Using the NE5205 integrated circuit this circuit was found in the May 1987 issue of Radio Electronics magazine. It can amplify signals up to 450MHz.
The bipolar transistors can be the BC548 and the FET a BF245. This configuration has a time...
This circuit emits an alert sound (interval beeps) if the car lights are left on and the ignition key...
We found this digital CMOS circuit in a documentation from the 90s. The circuit generates signals...