# 555 LED Blinker ## Description 5 V NE555 astable timer circuit that blinks an LED at about 1 Hz with current limiting, timing network, control-pin bypass, and supply decoupling. ## Project Details - **Owner:** devin-flux - **Created:** 6/7/2026 - **Last Updated:** 6/7/2026 - **Visibility:** Public ## Key Components ### D1 — [SML-D13FWT86C](https://www.flux.ai/cherepanyadima/sml-d13fwt86c.md) - Current: 5mA - Part Type: Optoelectronic Devices - Role Details: Blinking LED load on 555 output - Forward Voltage: 2.1V - Manufacturer Part Number: SML-D13FWT86C - Datasheet URL: https://www.snapeda.com/parts/SML-D13FWT86C/Rohm%20Semiconductor/datasheet/ - Role: Indicator - Manufacturer Name: Rohm Semiconductor **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [61300211121](https://www.flux.ai/adrian95/61300211121~11.md) - Current Rating: 3A - Role: Power Connector - Manufacturer Part Number: 61300211121 - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300211121.pdf - Manufacturer Name: Würth Elektronik - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: External 5 V and GND input; expected load under 20 mA **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [NE555P](https://www.flux.ai/adrian95/ne555p~870.md) - Manufacturer Name: Texas Instruments - Role: Timer IC - Role Details: NE555 astable oscillator, 5 V supply, ~1 Hz output - Part Type: Integrated Circuit - Manufacturer Part Number: NE555P - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fse555 **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/devin-flux/555-led-blinker-dnfqm~1z](https://www.flux.ai/devin-flux/555-led-blinker-dnfqm~1z).* --- *Generated from [https://www.flux.ai/devin-flux/555-led-blinker-dnfqm~1z](https://www.flux.ai/devin-flux/555-led-blinker-dnfqm~1z)*