# 3×AA LED Torch ## Description Simple handheld torch powered by three AA cells, using a white LED, maintained on/off switch, and an 82 Ω current-limiting resistor for reliable brightness. ## Project Details - **Owner:** dacre - **Created:** 8/20/2026 - **Last Updated:** 8/20/2026 - **Visibility:** Public ## Key Components ### D1 — [LED D5.0mm White](https://www.flux.ai/vasyl/led-d5p0mm-white~67p.md) - Role: Power Conversion - Forward Voltage: 3.3V - Functional Group: Torch Power Path - Role Details: 5 mm through-hole white LED light output; expected current approximately 15–20 mA from 3×AA through 82 Ω R1; anode fed through R1 and cathode returned to GND - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### J1 — [B2B-PH-K-S](https://www.flux.ai/adrian95/b2b-ph-k-s~fx.md) - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: JST_B2B-PH-K-S - Manufacturer Part Number: B2B-PH-K-S - Role Details: Polarized battery input for external 3×AA series holder; pin 1 BATT+, pin 2 GND; 4.5 V nominal, 4.8 V fresh - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Voltage: 4.5V - Power Requirements: Battery - Manufacturer Name: JST - Role: Power Conversion - Part Type: Connector - Functional Group: Torch Power Path - Symbol Style: parametric-v1 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW1 — [Slide Switch SW_SPDT](https://www.flux.ai/404src/slide-switch-swspdt~nq.md) - Role: Switching - Manufacturer Name: Wealth Metal - Datasheet URL: https://www.taydaelectronics.com/datasheets/A-5111.pdf - Functional Group: Torch Power Path - Role Details: Maintained SPDT slide switch used as SPST on/off; C throw intentionally unused - Purchase Url: https://www.taydaelectronics.com/slide-switch-1p2t-through-hole-0-5a-50vdc.html - Manufacturer Part Number: SS12F44G5 **Pins:** - A [pin 1] - B [pin 2] - C [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dacre/3aa-led-torch~mor](https://www.flux.ai/dacre/3aa-led-torch~mor).* --- *Generated from [https://www.flux.ai/dacre/3aa-led-torch~mor](https://www.flux.ai/dacre/3aa-led-torch~mor)*