Found in the February 1997 Electronics Now magazine, this circuit controls motors according to the transistor used. For the transistor indicated, the maximum current is 200 mA.
A frequency divider for digital signals can be constructed based on a single 4018 integrated...
This transmitter emits a modulated signal at a frequency given by the first transistor in the...
The figure shows how to use an LM3914 with a variable range moving point. The circuit has an...