We found this circuit in a Poptronics from 1998. The circuit can be extended to more competitors with another 4011. The power can be made with voltages from 6 to 12 V.
This oscillator takes advantage of the inductance of a high impedance magnetic earphone to...
This adjustable source was found in a 1979 documentation, but all components are still common...
The purpose of this Hartley oscillator is to produce the shot effect on a toy or other...