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.
The 4028 CMOS IC not only contains the complete decade counter, but also the 7-segment decoder...
Found in an EDN from the 90s, this circuit makes use of integrated circuits of the time, some of...
With this circuit a logic output signal from a microcontroller or other digital TTL configuration can...