Audio Preamplifier (CB18331E)

This small audio amplifier uses germanium transistors and a 12 V supply. The circuit is from a Japanese technical documentation from the 1960s.

| Clique na imagem para ampliar |

Solar Transmitter (CB14876E)
This small FM transmitter can be powered by solar cells in the range of 1.2 V to 6 V. Its range...
80 Hz Clock (CB6084E)
Found in a Hands On Electronics of the 80s, this circuit makes use of an integrated circuit of the time...
Voltage Level Detector (CB12391E)
When the input voltage exceeds the value set in R4, the LED lights up, indicating this. The...