This simple electronic music box circuit was found in the April 1985 issue of Radio Electronics. The components are common, and the note adjustments are made with trimpots.
When this circuit is activated the LED flashes for a moment indicating that the function has been...
This is the basic configuration for using a moving bar indicator or bargraph using the LM3914...
This circuit was found in old documentation. Transistors can be general purpose JFET types and the...