This simple injector circuit can actually be powered by voltages from 3 to 9 V. The frequency is given by C1 which can be between 4.7 and 10 nF. The CMOS can also be 4011.
This circuit with LDR and neon lamp has its operating frequency given by the light. The circuit is from...
Rapid Prototyping Boards for 32-bit Applications Include Peripherals, Easy-to-use Interface and...
Often, unauthorized people use the phone to make improper calls. A control for this is achieved with...