This interesting circuit for the RDA8851 allows you to obtain two volumes with a simple touch. The circuit is from an Electronics Now from December 1988. Note the amplifier voltages.
This simple digital circuit tester can work with TTL technology when powered by 5 V and with CMOS...
This circuit receives, through a coil, audio signals emitted by another coil connected to the...
This circuit is from the LM317's own manual obtained from an old documentation. The IC should be...