This interesting transistor circuit has several effects and an included amplifier. The circuit is monophonic and powered by standard batteries. The number of keys can be changed.
With this circuit you can control up to 3 A of LEDs in different sequences, using a PWM...
In the figure we have the transmitter of a data transmission system with optical fiber suggested by...
Using the 723 integrated circuit, this circuit was obtained from an article in the August 1971...