This detector with ultra-low deviation was found in an American documentation from the 90s. Operational amplifiers are from that time. The power supply must be symmetrical.
Found in an Electronics World of 1969, this circuit causes a light bulb to flash along with the...
This car circuit can be used in other applications with the proper choice of resistor. We found it in...
This simple TTL digital amplifier uses NAND gates and a high impedance speaker. ...