This is the circuit of a European commercial amplifier. It was published in Radio Electronics magazine in September 1958 and has a power of 5 watts with good sound quality.
The circuit shown in the figure makes use of an LM3909, a low consumption and low voltage IC. The...
This circuit generates a signal whose frequency can be calculated using the formula next to the...
This circuit causes the LEDs of an array of 100 LEDs to flash sequentially along the lines. The...