# 9V 555 LED Blinker ## Description Hand-solderable 9V battery-powered red LED blinker using a 555 timer in astable mode, with on/off switch and required decoupling/bypass capacitors. ## Project Details - **Owner:** ltembedded - **Created:** 5/25/2026 - **Last Updated:** 5/25/2026 - **Visibility:** Public ## Key Components ### D1 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - Part Type: LED - Manufacturer Part Number: LTL-307EE - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Current Limiting - Role Details: Red LED blinks from 555 output through current-limiting resistor - Manufacturer Name: Lite-On Inc. **Pins:** - A [pin 2] - K [pin 1] ### J1 — [967](https://www.flux.ai/jharwinbarrozo/967~fk9.md) - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p36.pdf - Role: Power Conversion - Manufacturer Name: Keystone Electronics - Role Details: Through-hole 9V battery snap; expected load about 15-25mA peak including NE555 and LED - Manufacturer Part Number: 967 - Part Type: Connectors **Pins:** - NEG [pin 2] - POS [pin 1] ### S1 — [200USP9T1A1M2RE](https://www.flux.ai/jecstronic/200usp9t1a1m2re~y9j.md) - Manufacturer Name: E-Switch - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://eswitch.wpengine.com/wp-content/uploads/2022/06/200U.pdf - Role Details: Through-hole SPST on/off switch for the 9V battery supply - Part Type: Switch - Manufacturer Part Number: 200USP9T1A1M2RE - Role: Switching **Pins:** - COM [pin 6] - NO [pin 4] - SUPPORT_TERMINAL_1 [pin 1] - SUPPORT_TERMINAL_2 [pin 3] ### U1 — [NE555P](https://www.flux.ai/adrian95/ne555p~870.md) - Manufacturer Part Number: NE555P - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: parametric-v1 - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fse555 - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Role Details: Astable oscillator at ~1.06 Hz from 9V battery; NE555P supports 4.5V-16V supply - Role: Timing **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/ltembedded/9v-555-led-blinker~jn](https://www.flux.ai/ltembedded/9v-555-led-blinker~jn).* --- *Generated from [https://www.flux.ai/ltembedded/9v-555-led-blinker~jn](https://www.flux.ai/ltembedded/9v-555-led-blinker~jn)*