# Bluetooth 24-Letter LED Controller ## Description 12 V Bluetooth controller board for 24 LED letter outputs using an ESP32, I/O expansion, and low-side output drivers. Draft specification captured from an uploaded reference schematic image; exact schematic recreation needs confirmation of unreadable details. ## Project Details - **Owner:** dzpcb - **Created:** 5/30/2026 - **Last Updated:** 5/30/2026 - **Visibility:** Public ## Key Components ### D1 — [B340B-13-F](https://www.flux.ai/adrian95/b340b-13-f~y1g.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Diodes Incorporated - Part Type: Diode - Role Details: 3 A 40 V Schottky diode for LM2596 buck regulator - Manufacturer Part Number: B340B-13-F - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/844/B320B-B360B_Rev10-2.pdf - Role: Buck Catch Diode **Pins:** - A [pin 2] - K [pin 1] ### F1 — [696108003002](https://www.flux.ai/adrian95/696108003002~uyi.md) - Role: Protection - Manufacturer Part Number: 696108003002 - Datasheet URL: https://www.we-online.com/components/products/datasheet/696108003002.pdf - Manufacturer Name: Wurth Elektronik - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Input fuse holder provisionally selected for 20 A total 12 V LED load - Part Type: Fuse Holder **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [TE-1986242-2](https://www.flux.ai/tbjers/te-1986242-2~0v.md) - Role Details: 12 V input connector; selected for high current margin - Manufacturer Name: TE Connectivity - Connector Pitch: 15mm - Manufacturer Part Number: 1986242-2 - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=9-1773451-7_HIGH_POWER_TERMINAL_BLOCKS&DocType=Data%20Sheet&DocLang=English&PartCntxt=1986242-2&DocFormat=pdf - Role: Power Input - Current Rating: 125A - Voltage Rating: 600V **Pins:** - A1 - A2 - A3 - A4 - B1 - B2 - B3 - B4 ### J10 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role: Switching - Part Type: Connector - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J11 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role: Switching - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Manufacturer Name: Ningbo Xinlaiya Elec. - Part Type: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Part Number: XY301V-A-5.0-2P **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J12 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role: Switching - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J13 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role: Switching - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J14 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Part Number: XY301V-A-5.0-2P - Part Type: Connector - Manufacturer Name: Ningbo Xinlaiya Elec. - Role: Switching - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J15 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Manufacturer Name: Ningbo Xinlaiya Elec. - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J16 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J17 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Role: Switching - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Part Number: XY301V-A-5.0-2P - Part Type: Connector - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J18 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Part Number: XY301V-A-5.0-2P - Part Type: Connector - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J19 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J2 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Role: Switching - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J20 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Manufacturer Part Number: XY301V-A-5.0-2P - Part Type: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Name: Ningbo Xinlaiya Elec. - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J21 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J22 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Manufacturer Name: Ningbo Xinlaiya Elec. - Manufacturer Part Number: XY301V-A-5.0-2P - Part Type: Connector - Role: Switching - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J23 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Part Number: XY301V-A-5.0-2P - Part Type: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Manufacturer Name: Ningbo Xinlaiya Elec. - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J24 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role: Switching - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Manufacturer Name: Ningbo Xinlaiya Elec. **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J25 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Part Type: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Part Number: XY301V-A-5.0-2P - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J26 — [TSW-104-07-G-S](https://www.flux.ai/adrian95/tsw-104-07-g-s~983.md) - Datasheet URL: http://suddendocs.samtec.com/prints/tsw-xxx-xx-xxx-x-xx-xxx-mkt.pdf - Role: Switching - Package or Case Code: TSW10407GS - Part Type: Connector - Role Details: 4-pin 2.54 mm header for 3V3, GND, TXD0, RXD0 - Manufacturer Name: Samtec Inc. - Manufacturer Part Number: TSW-104-07-G-S - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J3 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Role: Switching **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J4 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Role: Switching - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J5 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role: Switching - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Part Type: Connector - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Name: Ningbo Xinlaiya Elec. **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J6 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Part Type: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Part Number: XY301V-A-5.0-2P - Role: Switching - Manufacturer Name: Ningbo Xinlaiya Elec. **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J7 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role Details: 12 V LED letter output connector rated above provisional 3 A per output - Part Type: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role: Switching - Manufacturer Part Number: XY301V-A-5.0-2P - Manufacturer Name: Ningbo Xinlaiya Elec. **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J8 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Role: Switching - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J9 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Role: Switching - Manufacturer Part Number: XY301V-A-5.0-2P - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Role Details: 12 V LED letter output connector rated above provisional 3 A per output **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### Q1 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role: Switching - Manufacturer Part Number: AO3400A - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q10 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role: Switching - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Part Number: AO3400A - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q11 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role: Switching - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Part Type: Transistor - Manufacturer Part Number: AO3400A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q12 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Part Type: Transistor - Role: Switching - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Manufacturer Part Number: AO3400A - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q13 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Manufacturer Part Number: AO3400A - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Switching **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q14 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Part Number: AO3400A - Role: Switching - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q15 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Manufacturer Part Number: AO3400A - Part Type: Transistor - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role: Switching **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q16 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Manufacturer Part Number: AO3400A - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role: Switching - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q17 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - Role: Switching - Manufacturer Part Number: AO3400A - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q18 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role: Switching - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Part Type: Transistor - Manufacturer Part Number: AO3400A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q19 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role: Switching - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Part Number: AO3400A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q2 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Manufacturer Part Number: AO3400A - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Role: Switching - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q20 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - Role: Switching - Manufacturer Part Number: AO3400A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q21 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Role: Switching - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - Manufacturer Part Number: AO3400A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q22 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role: Switching - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Manufacturer Part Number: AO3400A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q23 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Manufacturer Part Number: AO3400A - Part Type: Transistor - Role: Switching - Manufacturer Name: Alpha & Omega Semiconductor Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q24 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Manufacturer Part Number: AO3400A - Role: Switching **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q3 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Manufacturer Part Number: AO3400A - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role: Switching - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q4 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role: Switching - Manufacturer Part Number: AO3400A - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q5 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Part Number: AO3400A - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role: Switching - Part Type: Transistor **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q6 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role: Switching - Manufacturer Part Number: AO3400A - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q7 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Manufacturer Part Number: AO3400A - Role: Switching - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q8 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Part Type: Transistor - Role: Switching - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Part Number: AO3400A - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q9 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Manufacturer Part Number: AO3400A - Role Details: Logic-level low-side switch for one 12 V LED letter output; final thermal suitability depends on confirmed channel current - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Role: Switching **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SW1 — [6x6mm micro tactile switch](https://www.flux.ai/jecstronic/6x6mm-micro-tactile-switch~igw.md) - Part Type: Switch - Purchase Url: https://shopee.ph/20Pcs-Micro-Tactile-Switch-Momentary-Tact-DIP-Switch-2Pin-6-X-6mm-Micro-Touch-Push-Button-Switch-High-5mm-6mm-7mm-8mm-9mm-i.1018846655.22773354064?sp_atk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&xptdk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&is_from_login=true - Role: Switching - Role Details: Momentary user/control pushbutton **Pins:** - P1 [pin 1] - P2 [pin 2] ### SW2 — [6x6mm micro tactile switch](https://www.flux.ai/jecstronic/6x6mm-micro-tactile-switch~igw.md) - Role: Switching - Role Details: Momentary user/control pushbutton - Purchase Url: https://shopee.ph/20Pcs-Micro-Tactile-Switch-Momentary-Tact-DIP-Switch-2Pin-6-X-6mm-Micro-Touch-Push-Button-Switch-High-5mm-6mm-7mm-8mm-9mm-i.1018846655.22773354064?sp_atk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&xptdk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&is_from_login=true - Part Type: Switch **Pins:** - P1 [pin 1] - P2 [pin 2] ### SW3 — [6x6mm micro tactile switch](https://www.flux.ai/jecstronic/6x6mm-micro-tactile-switch~igw.md) - Part Type: Switch - Purchase Url: https://shopee.ph/20Pcs-Micro-Tactile-Switch-Momentary-Tact-DIP-Switch-2Pin-6-X-6mm-Micro-Touch-Push-Button-Switch-High-5mm-6mm-7mm-8mm-9mm-i.1018846655.22773354064?sp_atk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&xptdk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&is_from_login=true - Role: Switching - Role Details: Momentary user/control pushbutton **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [ESP32-WROOM-32E-N16](https://www.flux.ai/jecstronic/esp32-wroom-32e-n16~wqb.md) - Role: Controller - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf - Manufacturer Part Number: ESP32-WROOM-32E-N16 - Manufacturer Name: Espressif Systems - Role Details: ESP32 Bluetooth control module; antenna must be kept clear at PCB edge - Part Type: Module **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND [pin 43] - GND [pin 1] - GND [pin 38] - GND [pin 42] - GND [pin 40] - GND [pin 46] - GND [pin 41] - GND [pin 45] - GND [pin 15] - GND [pin 47] - GND [pin 39] - GND [pin 44] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 21] - NC [pin 20] - NC [pin 32] - NC [pin 19] - NC [pin 17] - NC [pin 22] - NC [pin 18] - RXD0 [pin 34] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - TXD0 [pin 35] ### U2 — [MCP23017-E-SP](https://www.flux.ai/jecstronic/mcp23017-e-sp~er.md) - Role: I/O Expander - Datasheet URL: http://www.microchip.com/mymicrochip/filehandler.aspx?ddocname=en023709 - Manufacturer Name: Microchip - Manufacturer Part Number: MCP23017-E/SP - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Provides 16 additional output channels over I2C - Part Type: Integrated Circuit **Pins:** - ~RESET~ [pin 18] - A0 [pin 15] - A1 [pin 16] - A2 [pin 17] - GPA0 [pin 21] - GPA1 [pin 22] - GPA2 [pin 23] - GPA3 [pin 24] - GPA4 [pin 25] - GPA5 [pin 26] - GPA6 [pin 27] - GPA7 [pin 28] - GPB0 [pin 1] - GPB1 [pin 2] - GPB2 [pin 3] - GPB3 [pin 4] - GPB4 [pin 5] - GPB5 [pin 6] - GPB6 [pin 7] - GPB7 [pin 8] - INTA [pin 20] - INTB [pin 19] - NC [pin 14] - NC [pin 11] - SCK [pin 12] - SDA [pin 13] - VDD [pin 9] - VSS [pin 10] ### U3 — [LM2596S-5.0/NOPB](https://www.flux.ai/adrian95/lm2596s-5p0nopb~ji8.md) - Role Details: 5 V buck rail sized for approximately 0.5 A logic load; final current depends on confirmed system budget - Datasheet URL: https://www.ti.com/lit/ds/symlink/lm2596.pdf - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Role: Voltage Regulator - Manufacturer Part Number: LM2596S-5.0/NOPB - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~ON~/OFF [pin 5] - FEEDBACK [pin 4] - GND_TAB [pin 6] - GROUND [pin 3] - OUTPUT [pin 2] - VIN [pin 1] ### U4 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Part Type: Integrated Circuit - Role: Voltage Regulator - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AMS1117-3.3 - Manufacturer Name: AMS - Symbol Style: Parametric - Role Details: 3.3 V logic regulator for ESP32 and I/O expander - Datasheet URL: http://www.advanced-monolithic.com/pdf/ds1117.pdf **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dzpcb/bluetooth-24-letter-led-controller~uh](https://www.flux.ai/dzpcb/bluetooth-24-letter-led-controller~uh).* --- *Generated from [https://www.flux.ai/dzpcb/bluetooth-24-letter-led-controller~uh](https://www.flux.ai/dzpcb/bluetooth-24-letter-led-controller~uh)*