# Yeasty Coffee Translation Collar ## Description Compact MPPT Solar-Powered Dusk-to-Dawn 0.5 W LED Light with NCP3065 SEPIC Buck-Boost Driver, BQ24650 MPPT Charger, MIC845 Comparator, Vertical JST-PH 2-Pin Battery Connector, Off-Board Solar Input Pads/Optional Connector, Centered Backside LED, 1.4 mm Perimeter Clearance #SEPIC #NCP3065 ## Project Details - **Owner:** mrtucker - **Created:** 1/19/2026 - **Last Updated:** 1/19/2026 - **Visibility:** Public - **Target LED Power:** 0.5W - **Domain:** Energy - **Control Method:** Comparator-based day/night hysteresis - **Solar Panel Model:** Voltaic P123 - **Operating Voltage:** 3.7V - **Storage Cell Type:** 18650 Li-Ion - **Power Requirements:** Solar - **Power Source:** Power Source - **System Architecture:** flowchart TD SP["Solar Panel"] --> U1["Li-Ion Charger IC (BQ24650)"] U1 --> BATT["Battery (JST-PH) Connector"] SP --> DIV["Voltage Divider"] DIV --> CMP["Comparator (MIC845)"] CMP --> LEDDRV["SEPIC LED Driver (NCP3065)"] BATT --> LEDDRV LEDDRV --> LED["LED L1I0-0850150000000"] SP --> SOLPADS["Solar Input Pads/Connector"] SOLPADS --> U1 - **Project Title:** MPPT Solar-Powered 0.5 W LED Dusk-to-Dawn Light - **Manufacturing Quantity Target:** 10 ## Key Components ### D1 — [BZT52C5V6-13-F](https://www.flux.ai/adrian95/bzt52c5v6-13-f~18c.md) - Role: Protection - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: OVP clamp for U1 VCC input - Manufacturer Part Number: BZT52C5V6-13-F - Package: SOD-123 - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Part Type: Diode - Manufacturer Name: Diodes Incorporated **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Manufacturer Part Number: SS14 - Part Type: Diode - Role Details: Freewheeling diode for buck-boost LED driver - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Flyback / Freewheeling - Package: SOD-123 - Manufacturer Name: Slkor(SLKORMICRO Elec.) **Pins:** - Anode [pin A] - Cathode [pin C] ### J1 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Package: TH_2P_5.08mm - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English - Manufacturer Name: TE Connectivity AMP Connectors - Manufacturer Part Number: 282837-2 - Role Details: Voltaic P123 panel connector - Role: Connector - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Role Details: Solar panel connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English - Package: TH_2P_5.08mm - Manufacturer Name: TE Connectivity AMP Connectors - Role: Connector - Part Type: Connector - Manufacturer Part Number: 282837-2 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Role Details: JST-PH 2-pin connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Connector - Role: Connector - Package: TH_2P_2.00mm **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J4 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Role: Connector - Role Details: Optional solar panel connector footprint - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English - Manufacturer Name: TE Connectivity AMP Connectors - Manufacturer Part Number: 282837-2 - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [BQ24650RVAR c28a](https://www.flux.ai/emrememili/bq24650rvar-c28a~2q.md) - Manufacturer Part Number: BQ24650RVAR - Datasheet URL: https://cdn2.flux.ai/copilot-datasheets/pdf-upload-4bb014f692daee80bffbe190de9c51631277d3867df81bdd632ebc6bd2664518/a116774d0664e40d44681c63ad44a0bc39790a3e3aef4b790b6364ef05bd0cf0.pdf?GoogleAccessId=graviton-mvp%40appspot.gserviceaccount.com&Expires=4877062866&Signature=H8fMdrXara3g3jeDfaLVWGpMF5FYPcZ62jpznLPZpbD38WxuafiWN1p0gBo9r%2FHPykz74Hb04eigK6mLvrJVm47KYrKXpVoSkoaFKHwFDvgvNmlpeVnamPwWGdSSAAdlUwW2L8vOoB9V2AFtxcxsfHAKsziUktKQbLMplax%2FDZ8T7BA3BDbqxj4jrEP1rbzwvVNbCZY7bQW0MOZSLaKw9ShSH29DRT8xDqMl227WJCu175bDg7JHJGwtnWybVanI6DZEZwku7Q3B2AU0Zauq3FBb2z7uoslT3r3L8RkjMUxfNBXZy9kgVVosfPVx40ws9rzAIarEEfNRgMTwy6oP0A%3D%3D - Package or Case Code: VQFN - Manufacturer Name: Texas Instruments - Part Type: IC - Role: Power Management - Role Details: Li-Ion battery charger with MPPT for solar panel input **Pins:** - BTST [pin 16] - GND [pin 11] - HIDRV [pin 15] - LODRV [pin 13] - MPPSET [pin 2] - PH [pin 14] - REGN [pin 12] - SRN [pin 9] - SRP [pin 10] - STAT1 [pin 3] - STAT2 [pin 5] - TERM_EN [pin 7] - TS [pin 4] - VCC [pin 1] - VFB [pin 8] - VREF [pin 6] ### U1 — [BQ24650RVAR c28a](https://www.flux.ai/emrememili/bq24650rvar-c28a~2q.md) - Manufacturer Name: Texas Instruments - Part Type: IC - Manufacturer Part Number: BQ24650RVAR - Datasheet URL: https://cdn2.flux.ai/copilot-datasheets/pdf-upload-4bb014f692daee80bffbe190de9c51631277d3867df81bdd632ebc6bd2664518/a116774d0664e40d44681c63ad44a0bc39790a3e3aef4b790b6364ef05bd0cf0.pdf?GoogleAccessId=graviton-mvp%40appspot.gserviceaccount.com&Expires=4877062866&Signature=H8fMdrXara3g3jeDfaLVWGpMF5FYPcZ62jpznLPZpbD38WxuafiWN1p0gBo9r%2FHPykz74Hb04eigK6mLvrJVm47KYrKXpVoSkoaFKHwFDvgvNmlpeVnamPwWGdSSAAdlUwW2L8vOoB9V2AFtxcxsfHAKsziUktKQbLMplax%2FDZ8T7BA3BDbqxj4jrEP1rbzwvVNbCZY7bQW0MOZSLaKw9ShSH29DRT8xDqMl227WJCu175bDg7JHJGwtnWybVanI6DZEZwku7Q3B2AU0Zauq3FBb2z7uoslT3r3L8RkjMUxfNBXZy9kgVVosfPVx40ws9rzAIarEEfNRgMTwy6oP0A%3D%3D - Role Details: Li-Ion battery charger with MPPT for solar panel input - Package or Case Code: VQFN - Role: Power Management **Pins:** - BTST [pin 16] - GND [pin 11] - HIDRV [pin 15] - LODRV [pin 13] - MPPSET [pin 2] - PH [pin 14] - REGN [pin 12] - SRN [pin 9] - SRP [pin 10] - STAT1 [pin 3] - STAT2 [pin 5] - TERM_EN [pin 7] - TS [pin 4] - VCC [pin 1] - VFB [pin 8] - VREF [pin 6] ### U3 — [NCP3065DR2G](https://www.flux.ai/lcsc/ncp3065dr2g~th63.md) - Manufacturer Name: onsemi(安森美) - Manufacturer Part Number: NCP3065DR2G - Role: Power Conversion - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809171606_onsemi-NCP3065DR2G_C145186.pdf - LCSC Part Number: C145186 - Part Type: DC-DC Converters - Role Details: Configured as SEPIC buck-boost LED driver for 0.5 W LED - Product Info Url: https://lcsc.com/product-detail/DC-DC-Converters_ON_NCP3065DR2G_NCP3065DR2G_C145186.html - JLCPCB Part Class: Extended Part - Package: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL **Pins:** - ComparatorInvertingInput [pin 5] - GND [pin 4] - IpkSense [pin 7] - N.C. [pin 8] - SwitchCollector [pin 1] - SwitchEmitter [pin 2] - TimingCapacitor [pin 3] - VCC [pin 6] ### U3 — [LT3756EUD-1#PBF](https://www.flux.ai/adrian95/lt3756eud-1pbf~nox.md) - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/LT3756-3756-1-3756-2.pdf - Package: 16-QFN_3x3 - Part Type: Integrated Circuit - Manufacturer Part Number: LT3756EUD-1#PBF - Role: Power Conversion - Manufacturer Name: Analog Devices - Role Details: Buck-boost LED driver for 0.5 W LED load - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~OPENLED [pin 3] - ~SHDN~/UVLO [pin 6] - CTRL [pin 16] - FB [pin 12] - GATE [pin 10] - GND [pin 17] - INTVCC [pin 7] - ISN [pin 13] - ISP [pin 14] - PWM [pin 2] - PWMOUT [pin 11] - RT [pin 5] - SENSE [pin 9] - SS [pin 4] - VC [pin 15] - VIN [pin 8] - VREF [pin 1] ### U4 — [MCP65R41T-2402E-CHY](https://www.flux.ai/adrian95/mcp65r41t-2402e-chy~jgr.md) - Part Type: Integrated Circuit - Datasheet URL: https://www.snapeda.com/parts/MCP65R41T-2402E/CHY/Microchip%20Technology/datasheet/ - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MCP65R41T-2402E/CHY - Manufacturer Name: Microchip Technology Inc. **Pins:** - IN- [pin 4] - IN+ [pin 3] - OUT [pin 1] - VDD [pin 6] - VREF [pin 5] - VSS [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/mrtucker/yeasty-coffee-translation-collar~sx](https://www.flux.ai/mrtucker/yeasty-coffee-translation-collar~sx).* --- *Generated from [https://www.flux.ai/mrtucker/yeasty-coffee-translation-collar~sx](https://www.flux.ai/mrtucker/yeasty-coffee-translation-collar~sx)*