Battery charger (CB9121E)

Found in an Electronics Now from the 1980s, this circuit uses some components that are still common today. For others, equivalents can be tested.

| Clique na imagem para ampliar |

4 quadrant dimmer (CB7042E)
This interesting circuit found in an Elektor from the 90s controls loads in four quadrants of the driving...
Transistor Bistable (CB14010E)
This flip-flop was found in an old documentation, being able to use transistors of general use...
Oscillator with voltage comparator (CB9050E)
For the component values used in thisf this circuit, the frequency can be adjusted between 740 Hz and...