# 9V 555 Red LED Blinker TH ## Description Through-hole NE555 astable circuit that blinks a red LED about once per second from a switched 9V battery. ## Project Details - **Owner:** brooks - **Created:** 5/15/2026 - **Last Updated:** 5/15/2026 - **Visibility:** Public ## Key Components ### J1 — [967](https://www.flux.ai/jharwinbarrozo/967~fk9.md) - Role Details: Through-hole Keystone 967 9V battery connector supplying the estimated <15mA blinker load. - Role: Power Conversion - Manufacturer Part Number: 967 - Manufacturer Name: Keystone Electronics - Part Type: Connectors - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p36.pdf **Pins:** - NEG [pin 2] - POS [pin 1] ### LED1 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - Role Details: 5mm through-hole red LED used as the visual blink indicator, driven at about 4.7mA through R3 from the 555 output. - Part Type: LED - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Signal Generation - Manufacturer Part Number: LTL-307EE - Manufacturer Name: Lite-On Inc. **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 - Role Details: SPST through-hole slide switch; carries the estimated <15mA total circuit current from the 9V battery. - Part Type: Switch - Manufacturer Part Number: AS11CH - Role: Switching **Pins:** - P1 - P3 ### U1 — [NE555P](https://www.flux.ai/adrian95/ne555p~870.md) - Role Details: Astable oscillator from switched 9V rail; timing set by R1=47kΩ, R2=47kΩ, C1=10uF for about 1 second period. - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fse555 - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: parametric-v1 - Manufacturer Part Number: NE555P - Role: Signal Generation - Manufacturer Name: Texas Instruments **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/9v-555-red-led-blinker-th~z0](https://www.flux.ai/brooks/9v-555-red-led-blinker-th~z0).* --- *Generated from [https://www.flux.ai/brooks/9v-555-red-led-blinker-th~z0](https://www.flux.ai/brooks/9v-555-red-led-blinker-th~z0)*