We found this configuration in a 1990 Poptronics. The circuit can be powered by voltages between 6 and 15 V, changing the resistors in series with the LED. The frequency is set at R7.
This is a circuit for receiving signals from the previous transmitter. The circuit uses a common...
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
A touch of the X1 sensor causes the motor to be activated for a time that can be adjusted in P1....