# Selector DTMF por Pulsación Única 85ff ## Description Circuito digital puro a 5 V con un único pulsador para avance por toque corto, confirmación por toque largo de 2 s, visualización de 4 opciones por LED y transmisión DTMF mediante HT9200A. ## Project Details - **Owner:** forevermg - **Created:** 5/23/2026 - **Last Updated:** 5/23/2026 - **Visibility:** Public ## Key Components ### D1 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - Manufacturer Part Number: LTL-307EE - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED - Manufacturer Name: Lite-On Inc. **Pins:** - A [pin 2] - K [pin 1] ### D2 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: LTL-307EE - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - Manufacturer Name: Lite-On Inc. - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### D3 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - Manufacturer Name: Lite-On Inc. - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - Manufacturer Part Number: LTL-307EE **Pins:** - A [pin 2] - K [pin 1] ### D4 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - Manufacturer Part Number: LTL-307EE - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Lite-On Inc. - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### J1 — [Pin Header 01x02 2.54mm Vertical](https://www.flux.ai/jharwinbarrozo/generic-pin-header-01x02-2p54mm-vertical~4uy.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J2 — [Pin Header 01x02 2.54mm Vertical](https://www.flux.ai/jharwinbarrozo/generic-pin-header-01x02-2p54mm-vertical~4uy.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### S1 — [SWITCH-PUSH-6mm-H5mm-4pin](https://www.flux.ai/baronunread/switch-push-6mm-h5mm-4pin~4u.md) - Part Type: Switch - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1-1 [pin 1-1] - 1-2 [pin 1-2] - 2-1 [pin 2-1] - 2-2 [pin 2-2] ### U1 — [SN74LS193N](https://www.flux.ai/jecstronic/sn74ls193n~5cl.md) - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/lit/ds/symlink/sn74ls193.pdf - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SN74LS193N **Pins:** - A [pin 15] - B [pin 1] - BO [pin 13] - C [pin 10] - CLR [pin 14] - CO [pin 12] - D [pin 9] - DOWN [pin 4] - GND [pin 8] - LOAD [pin 11] - QA [pin 3] - QB [pin 2] - QC [pin 6] - QD [pin 7] - UP [pin 5] - VCC [pin 16] ### U2 — [NE555P](https://www.flux.ai/kicad-part-library/ne555p~vhf.md) - Domain: Consumer Electronics - Operating Voltage: 5V - Package or Case Code: DIP-8_W7.62mm - Part Type: Precision Timer - Manufacturer Part Number: NE555P - Datasheet URL: http://www.ti.com/lit/ds/symlink/ne555.pdf - Role: Signal Generation - Manufacturer Name: Texas Instruments Inc. - Role Details: Astable oscillator for dual-LED flasher **Pins:** - CONT [pin 5] - DISCH [pin 7] - GND [pin 1] - OUT [pin 3] - RESET [pin 4] - THRES [pin 6] - TRIG [pin 2] - VCC [pin 8] ### U3 — [NE555P](https://www.flux.ai/kicad-part-library/ne555p~vhf.md) - Datasheet URL: http://www.ti.com/lit/ds/symlink/ne555.pdf - Role: Signal Generation - Manufacturer Name: Texas Instruments Inc. - Operating Voltage: 5V - Manufacturer Part Number: NE555P - Domain: Consumer Electronics - Part Type: Precision Timer - Package or Case Code: DIP-8_W7.62mm - Role Details: Astable oscillator for dual-LED flasher **Pins:** - CONT [pin 5] - DISCH [pin 7] - GND [pin 1] - OUT [pin 3] - RESET [pin 4] - THRES [pin 6] - TRIG [pin 2] - VCC [pin 8] ### U4 — [SN74LS138N](https://www.flux.ai/adrian95/sn74ls138n~l4e.md) - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/sdls014/sdls014.pdf - Manufacturer Part Number: SN74LS138N - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~G2A [pin 4] - ~G2B [pin 5] - A [pin 1] - B [pin 2] - C [pin 3] - G1 [pin 6] - GND [pin 8] - VCC [pin 16] - Y0 [pin 15] - Y1 [pin 14] - Y2 [pin 13] - Y3 [pin 12] - Y4 [pin 11] - Y5 [pin 10] - Y6 [pin 9] - Y7 [pin 7] ### U5 — [SN74LS04N](https://www.flux.ai/lcsc/sn74ls04n~7zod.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410122031_Texas-Instruments-SN74LS04N_C183657.pdf - Manufacturer Part Number: SN74LS04N - Package or Case Code: PDIP-14_L19.7-W6.6-P2.54-LS8.3-BL - JLCPCB Part Class: Extended Part - LCSC Part Number: C183657 - Product Info Url: https://lcsc.com/product-detail/74-Series_TI_SN74LS04N_SN74LS04N_C183657.html - Part Type: Gates - Manufacturer Name: TI(德州仪器) **Pins:** - 1A [pin 1] - 1Y [pin 2] - 2A [pin 3] - 2Y [pin 4] - 3A [pin 5] - 3Y [pin 6] - 4A [pin 9] - 4Y [pin 8] - 5A [pin 11] - 5Y [pin 10] - 6A [pin 13] - 6Y [pin 12] - GND [pin 7] - VCC [pin 14] ### U6 — [SN74LS08N](https://www.flux.ai/jecstronic/sn74ls08n~4mp.md) - Manufacturer Part Number: SN74LS08N - Manufacturer Name: Texas Instruments Inc. - Datasheet URL: https://www.ti.com/lit/ds/symlink/sn74ls08.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1A [pin 1] - 1B [pin 2] - 1Y [pin 3] - 2A [pin 4] - 2B [pin 5] - 2Y [pin 6] - 3A [pin 9] - 3B [pin 10] - 3Y [pin 8] - 4A [pin 12] - 4B [pin 13] - 4Y [pin 11] - GND [pin 7] - VCC [pin 14] ### U7 — HT9200B - Manufacturer Part Number: HT9200B - Datasheet URL: https://www.microelectronicash.com/downloads/HT9200B.pdf - Manufacturer Name: Holtek **Pins:** - CE [pin 1] - CLK [pin 11] - D0 [pin 6] - D1 [pin 7] - D2 [pin 8] - D3 [pin 9] - DATA [pin 12] - DTMF [pin 13] - NC [pin 5] - S/P [pin 10] - VDD [pin 14] - VSS [pin 4] - X1 [pin 3] - X2 [pin 2] ### Y1 — [XIHCELNANF-3.579545M](https://www.flux.ai/lcsc/xihcelnanf-3p579545m~er9g.md) - Product Info Url: https://lcsc.com/product-detail/49S_3-579545MHz-12PF-30PPM-40-85_C117861.html - Manufacturer Name: TAITIEN(泰艺电子) - Manufacturer Part Number: XIHCELNANF-3.579545M - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_TAITIEN-Elec-XIHCELNANF-3-579545M_C117861.pdf - Package or Case Code: HC-49US_L11.5-W4.5-P4.88 - Part Type: Crystals - LCSC Part Number: C117861 - JLCPCB Part Class: Extended Part **Pins:** - OSC1 [pin 1] - OSC2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/forevermg/selector-dtmf-por-pulsacion-unica-85ff~j0](https://www.flux.ai/forevermg/selector-dtmf-por-pulsacion-unica-85ff~j0).* --- *Generated from [https://www.flux.ai/forevermg/selector-dtmf-por-pulsacion-unica-85ff~j0](https://www.flux.ai/forevermg/selector-dtmf-por-pulsacion-unica-85ff~j0)*