# [Walkthrough] Transistor Switch Relay ## Project Details - **Owner:** nico - **Created:** 5/18/2022 - **Last Updated:** 12/27/2022 - **Visibility:** Public - **Forks:** 2 - **Copies:** 3 ## Key Components ### B2 — [Battery Holder 1 Cell SMD](https://www.flux.ai/jharwinbarrozo/battery-holder-smd-1-cell-18650~wj1.md) - Manufacturer Part Number: 1042 - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/userAssets/file/M65p27.pdf - Voltage: 4.2V **Pins:** - NEGATIVE - POSITIVE ### J2 — [XY301V-A-5.0-3P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-3p~ox.md) - Manufacturer Part Number: XY301V-A-5.0-3P - Datasheet URL: https://datasheet.lcsc.com/lcsc/2005271131_Ningbo-Xinlaiya-Elec--XY301V-A-5-0-3P_C557652.pdf - Manufacturer Name: Microchip **Pins:** - PIN1 - PIN2 - PIN3 ### K1 — [SPDT SRD Series Form C](https://www.flux.ai/jharwinbarrozo/spdt-srd-series-form-c~yz.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021933_Ningbo-Songle-Relay-SRD-05VDC-SL-C_C35449.pdf - Manufacturer Name: Ningbo Songle Relay - Manufacturer Part Number: SRD-05VDC-SL-C - Part Type: Switch **Pins:** - A - B - COM - L1 - L2 ### Q1 — [S8050-JH](https://www.flux.ai/jharwinbarrozo/s8050-jh~k9s.md) - Manufacturer Part Number: S8050 - Beta / hFe: 300 **Pins:** - B - C - E ### SW1 — [B3FS-1050P](https://www.flux.ai/jharwinbarrozo/b3fs-1050p~hog.md) - Manufacturer Part Number: B3FS-1050P - Datasheet URL: https://datasheet.lcsc.com/lcsc/1809271215_Omron-Electronics-B3FS-1050P_C231326.pdf - Part Type: Switch - Manufacturer Name: OMRON **Pins:** - P1 - P2 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/nico/walkthrough-transistor-switch-relay~0kb](https://www.flux.ai/nico/walkthrough-transistor-switch-relay~0kb).* --- *Generated from [https://www.flux.ai/nico/walkthrough-transistor-switch-relay~0kb](https://www.flux.ai/nico/walkthrough-transistor-switch-relay~0kb)*