This is the circuit diagram of USB powered stereo computer speaker, or it widely known as multimedia speakers for PCs. The circuit has single-chipbased design, low-voltage electrical power supply, compatibility with USB power from computer, simple heat-sinking, inexpensive, large flexibility and wide temperature tolerance. At the heart of the circuit is IC TDA2822M. This IC… Read More »
This 300W OCL power amplifier -i’m sorry for the blur diagram, but it should be readable- use 4 pairs of 2N3055 dan MJ3055 transistor as the main power components. This is good circuit, i’ve built this OCL (ouput capacitor-less) power amplifier circuit for my school project, and of course i use it for my home… Read More »
The following is 4 x 25W quad audio amplifier circuit (amplifier with four inputs and four outputs) based TDA7381. This amplifier is designed for car audio system, but you can also use this circuit for other purposes. This circuit has a design very simple and very easy to build. Schematic diagram: If properly layouted and… Read More »
This 4W Audio Amplifier circuit is powered by 2 pieces of transistor TIP41. The circuit is very simple and incorporates darlington output transistors that will provide more than enough output current than is needed to drive a 3-ohm speaker. The 4W audio amplifier circuit is very simple and incorporates darlington output transistors that will provide… Read More »
This is the circuit diagram of 2 Watt mini audio amplifier. This circuit is inexpensive, easy and quite simple. This is general audio amplifier which can be used for computer, CD player or other devices which have headphone output. The circuit was deliberately designed using no ICs and in a rather old-fashioned manner in order… Read More »