We found this circuit in the August 1990 issue of Radio Electronics magazine. The two-digit circuit uses a pressure sensor and is powered by a 9V battery.
This circuit can be used to excite push-pull steps of audio amplifiers. From an audio signal at...
This integrator circuit uses the junction FETs which can also be the BF245 or MPF102. The...
This circuit is from a Radio Electronics from September 1969. The integrated circuit used is one...