This is a bass booster circuit that use transistors as base. It is designed to increase a low frequency of audio on cheaper than ICs or normally circuit.
This 100W amplifier circuit by transistors, but very well OCL amplifier schematic.Use transistor MJ15003,MJ15004 as main. Power supply +38V 0 -38V 3A. [...]
his is Digital multimeter circuit using ICL7107. dc digital meter circuit to smart full function, measure DCV, ACV, DC Amp meter, AC Amp meter, Ohms [...]
See simple intercom circuit using transistors and a few parts. So easy build and cheaper than ICs. For a small home and learning.
See simple Infrared Intruder Alarm circuit. Even it is best. But it is a good teacher to learn electronics. Using infra-red system.
Simple electronic drum circuit project is an Instrument of this era really, various sound effects and many others, using digital IC and more
I recommend you to make a Simple speaker delay circuit. Imagine you finished a normally OCL power amplifier. Every time you turn on within the first 3 seconds. You may…