This circuit was found in a 90s Radio Electronics. The integrated circuit admits an equivalent. The power supply will depend on the integrated circuit used.
TTL square signals can be divided by 10 using this circuit. The maximum frequency depends on the...
This circuit indicates when the voltage of a 12 V battery is low. With changes, for example, the...
This is a basic inverter circuit for a 70 kHz crystal. We found it in an old documentation using an...