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 came out at a Wireless World in January 2000. The circuit can be easily assembled as it uses...
This circuit was found in a Electronics Handbook (1989). The shown amplifier provides a few...
This instrumentation amplifier uses three operational ones, and the components must maintain the...