Blinking LED Circuit Design
Make a circuit that blinks a red LED once per second.
Power it with a 9V block battery through an on/off switch.
Use components that are easy to hand-solder.
Thought for 3 sec
I can’t modify the project right now because there are no available ACUs, so no schematic work has been created yet.
What remains to do once ACUs are available:
- Add a hand-solderable 555 timer circuit powered from a 9V battery.
- Add an SPST on/off switch in series with the battery.
- Use through-hole parts: NE555 DIP-8, red 5 mm LED, resistors, capacitors, battery clip, and switch.
- Configure the 555 as an astable oscillator for ~1 Hz blinking.
Suggested starter values:
- IC: NE555P / LM555 DIP-8
- R1: 10 kΩ
- R2: 68 kΩ
- C timing: 10 µF electrolytic
- LED resistor: 1 kΩ
- Supply decoupling: 100 nF across 555 VCC/GND
- Optional control pin capacitor: 10 nF from pin 5 to GND
This gives roughly a 1-second blink period and is beginner-friendly to solder on perfboard or a PCB.
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