200 W 12 V to 115 V inverter (CB7153E)

This circuit was found in Philips documentation from 1969. The components are from the time including transformers that are commercial types.

| Clique na imagem para ampliar |

9 V Battery Tester and Cell (CB15087E)
If the battery is good, the LED flashes. This simple tester uses an LM3909 integrated circuit. We found...
Colpitts Crystal Oscillator (CB19355E)
The crystal used in this oscillator can have frequencies up to 30 MHz or more, depending on the...
100 kHz to 20 MHz radio (CB18322E)
This 1967 commercial radio covers 6 wave bands selected by appropriate coils. The circuit...