This is the analog part of the previous circuit with the pressure sensor for the altimeter. The circuit is from a Radio Electronics from October 1990.
This circuit is from the old RCA transistors manual of 1964. The transistor can be the BC558 and...
Found in a 90s PE Hobbyst Handbook, this circuit mimics the sound of a space gun. The components...
Found on an 80's Radio Electronics, this circuit is designed to pass the 300 to 34,000 Hz voice...