This interesting circuit converts BCD signals into a voltage that can be used in an analog application. The circuit was found in the July 1991 issue of Radio Electronics magazine.
Servo motors operate from the changes in the pulse width in a range between 1 and 2 ms. The...
This circuit uses a crystal phone and can be built with more modern transistors like the BC548. The...
Using junction FETs, a configurable configuration is achieved for very low frequencies. FETs can...