We found this circuit in an American publication from the 90s. It generates pulses that can be modulated in amplitude. The supply can be done by voltages from 5 to 12 V and the frequency depends on C1 and C2.
This simple neon lamp power indicator circuit was found in the January 1971 Radio Electronics...
This circuit was found in Radio Electronics magazine from June 1958. The maximum distance depends on...
Using two common operationals, such as 741, this circuit serves as a medium control in an...