This circuit was obtained from Linear Technology documentation from the 80's. Powered by 5 V it can be used as a shield. The components are from the era.
This circuit consists of a voltage regulator for 6 V batteries with a very low voltage drop. The...
This circuit was obtained from a 1986 Spanish magazine Resistor. The magazine no longer exists, but...
We found this circuit of a transistor siren in a recent English publication. All components are still...