25 W Mullard Amplifier (CB6176E)

Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz. Modern equivalent transistors can be used.

| Clique na imagem para ampliar |

Astable CMOS 4049 (CB24854E)
Found in the November 1984 issue of Radio Electronics magazine, this circuit generates frequencies that...
High Speed Optocoupler (CB23595E)
This circuit is suggested by Motorola, using a 4N26 type coupler and an MC1733 type operative. However,...
Electret polarization (CB6968E)
This polarization step for electret microphones was found in an Electronics Now from the 90s. The...