This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch the frequency of an oscillator by voltage. The circuit can act as a shield.
March 2017 - The new ERB-RD, ERB-RE and ERB-RG fuses from Panasonic's Micro Chip Fuses can now be...
Two inverters, of the 6 available in a Low-power Schottky 74LS04, are used in this anti-ring...
The integrated circuit used is a voltage reference from Motorola. This configuration was obtained in...