This circuit with its light source was found in American documentation two years 70. Or transformer of the type found in small transistor radios of the time. The transistors are general-purpose.
This simple, unregulated power supply is indicated for non-critical projects that require currents up...
This alarm uses several sensors that directly trigger a sensitive relay. A larger relay can be...
This is a well-known oscillator configuration with complementary transistors. In this case, the...