This mixer was found in Silicon Chip documentation from the 90's. The circuit uses integrated circuits from that time.
This is a Serial In - Parallel Out or Serial Out [SIPO or SISO] shift register using the...
This circuit was obtained in a 1973s documentation. The transistors may be BC558 for the PNP and...
This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that...