We found this circuit in a Japanese 1968’s documentation. The circuit makes use of transistors from that country common at the time of publication. Observe the symmetrical power supply for the circuit.
This circuit was found in 1978 documentation, using the National Semiconductor's LM380. The...
April 2017 - The new Alps UGMZ2AA Bluetooth communication modules can be found on Mouser...
This configuration triggers an external circuit or simply an LED for time given by R1 and C1 (T =...