Found in a 90s Popular Electronics, this circuit checks if a remote-control transmitter is emitting signals. The sensor is a general-purpose type found in many electronic devices.
This second-order filter was found in old American documentation and can be applied to other...
Found in an old Elektor, this circuit uses two 7-segment displays to indicate the volume of an...
Found in a 90s Popular Electronics, this circuit makes use of power MOSFETs. Equivalent MOSFETs can be...