This circuit can be powered by 2 or 3 small batteries. The resistor can have values between 220 ohms and 1k. The LED is any color. We found it in old English documentation.
Continuity Test (CB22130E)
- Details
- Written by: Newton C. Braga
This circuit can be powered by 2 or 3 small batteries. The resistor can have values between 220 ohms and 1k. The LED is any color. We found it in old English documentation.
