Code Sidetone Generator (CB26323E)

This code practice circuit was found in a 1990s issue of Radio Amaterur Today magazine. It produces an audio tone with the 555.

| Clique na imagem para ampliar |

Regulator with Reference Voltage (CB19409E)
The reference voltage determines the output voltage on this circuit which has a maximum current of 5 A....
Low Pass Filter with Transistors (CB19699E)
This filter of two transistors has the cutoff frequency determined by the formulas next to the...
R1524x Low Current LDO Regulators
July 2017 - Ricoh's new 200mA R1524x voltage regulators are available from Mouser Electronics with...