# May 2026 9V 555 LED Blinker ## Description Through-hole 9V battery-powered 555 timer circuit that blinks a red LED about once per second through an on/off switch, designed for easy hand soldering. ## Project Details - **Owner:** brooks - **Created:** 5/19/2026 - **Last Updated:** 5/19/2026 - **Visibility:** Public ## Key Components ### BT1 — [967](https://www.flux.ai/jharwinbarrozo/967~fk9.md) - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p36.pdf - Part Type: Connectors - Manufacturer Name: Keystone Electronics - Role Details: 9V battery snap, total load about 15mA peak - Manufacturer Part Number: 967 - Role: Energy Storage **Pins:** - NEG [pin 2] - POS [pin 1] ### D1 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Signal Generation - Manufacturer Part Number: LTL-307EE - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - Role Details: Red through-hole LED driven by U1 output through R3 - Manufacturer Name: Lite-On Inc. - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [200USP9T1A1M2RE](https://www.flux.ai/jecstronic/200usp9t1a1m2re~y9j.md) - Part Type: Switch - Role: Switching - Manufacturer Part Number: 200USP9T1A1M2RE - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: SPST through-hole on/off switch for 9V battery rail, about 15mA load - Datasheet URL: https://eswitch.wpengine.com/wp-content/uploads/2022/06/200U.pdf - Manufacturer Name: E-Switch **Pins:** - COM [pin 6] - NO [pin 4] - SUPPORT_TERMINAL_1 [pin 1] - SUPPORT_TERMINAL_2 [pin 3] ### U1 — [NE555P](https://www.flux.ai/kicad-part-library/ne555p~vhf.md) - Role Details: NE555P DIP-8 astable oscillator powered from switched 9V - Role: Timing - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: DIP-8_W7.62mm - Part Type: Precision Timer - Operating Voltage: 5V - Manufacturer Part Number: NE555P - Domain: Consumer Electronics - Datasheet URL: http://www.ti.com/lit/ds/symlink/ne555.pdf **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/may-2026-9v-555-led-blinker~03](https://www.flux.ai/brooks/may-2026-9v-555-led-blinker~03).* --- *Generated from [https://www.flux.ai/brooks/may-2026-9v-555-led-blinker~03](https://www.flux.ai/brooks/may-2026-9v-555-led-blinker~03)*