We found this circuit in a 1975 publication. The power supply must be symmetrical, but other voltages may be used. The LEDs can be of different colors. The circuit is connected to the analog tuning indicator of common FM receivers.
We found this circuit in a 1975 publication. The power supply must be symmetrical, but other voltages may be used. The LEDs can be of different colors. The circuit is connected to the analog tuning indicator of common FM receivers.
