How to make a Light Sensitive Sound Generator Circuit?
An oscillator circuit may have many applications. The diagram below shows how to make it work as a light sensitive sound generator using a LDR and a 741 operactional amplifier.
This blown fuse indicator circuit warns us, lighting a LED, when there is a problem in an electrical installation protected by the fuse.
It is very important to correct the faults in the electrical system of an automobile or motorcycle or other, as soon as possible. This circuit will warn us when this happens.