This is a simple circuit for blinking an LED using a relay and a capacitor.
The Circuit
In the three different circuits below, you can build the relay circuit first in fast switching mode, then in slow switching mode, then with the blinking LED.
Parts List
| Reference | Value |
|---|---|
| Battery | 9V |
| Capacitor | 1000 µF |
| LED | Light-emitting Diode |
| Relay | DigiKey # 2449-J104D2C9VDC.20S-ND |
| Resistor | 470 |
The Layout
Here's how to connect this on a breadboard. Check if your relay pinout matches the one here, or update if not.
