A 15 watt amplifier made using discrete components. Sergio designed this circuit for his...
The base of Ql is connected to the car"s ignition circuit. One side of the piezoelectric buzzer...
The chips that are termed "working well" yield about 300 mV under the beam from a laser pointer...
A common NPN transistor can be turned into a negistor by wiring it in reverse. The emitter is...
Most models produced in the 30s rely on very similar circuits; in particular the RF section of...