# 555 LED Blinker ## Description Through-hole 9V NE555 red LED blinker circuit with on/off switch ## Project Details - **Owner:** brooks - **Created:** 5/5/2026 - **Last Updated:** 5/8/2026 - **Visibility:** Public ## Key Components ### BT1 — [967](https://www.flux.ai/jharwinbarrozo/967~fk9.md) - Role Details: 9V block battery connector feeding the on/off switch - Role: Power Input - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p36.pdf - Manufacturer Part Number: 967 - Part Type: Connectors **Pins:** - NEG [pin 2] - POS [pin 1] ### LED1 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - Role Details: Red LED driven by U1 output through R3 - Manufacturer Part Number: LTL-307EE - Manufacturer Name: Lite-On Inc. - Role: Indicator **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [AS11CH](https://www.flux.ai/adrian95/as11ch~i2s.md) - Datasheet URL: https://www.nkkswitches.com/pdf/Aslides.pdf - Part Type: Switch - Manufacturer Part Number: AS11CH - Role: Power Switch - Role Details: On/off switch between battery positive and switched 9V rail **Pins:** - P1 - P3 ### U1 — [NE555P](https://www.flux.ai/kicad-part-library/ne555p~vhf.md) - Role: Signal Generation - Datasheet URL: http://www.ti.com/lit/ds/symlink/ne555.pdf - Manufacturer Name: Texas Instruments Inc. - Domain: Consumer Electronics - Operating Voltage: 5V - Part Type: Precision Timer - Role Details: Astable oscillator for red LED blinker; approx 1.02 Hz using R1=47kΩ, R2=47kΩ, C1=10uF - Package or Case Code: DIP-8_W7.62mm - Manufacturer Part Number: NE555P **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] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/brooks/555-led-blinker~zc](https://www.flux.ai/brooks/555-led-blinker~zc).* --- *Generated from [https://www.flux.ai/brooks/555-led-blinker~zc](https://www.flux.ai/brooks/555-led-blinker~zc)*