Simple diagrams circuits - small electronic projects

Tr1 and Tr2 transistors funcitons as direct coupled voltage amplifiers. R6 resistor, D1 and D2 diodes determine the standby current of complement driver stage (Tr3/Tr4) and output stage (Tr5/Tr6). C3, C5, C6 and R3 help keeping stability. Amplifier’s input sensitivity is 400mA at 4 ohm load and 12V supply and 600mV at 8 ohm load [...]

A simple two-stage amplifier. Use any general-purpose NPN with high gain. It will drive low impedance headphones directly. A speaker will probably require further boost. …. วงจรขยายเสียงขนาดเล็กมาก ใช้ทรานซิสเตอร์เพียง 2 ตัวเท่านั้น อ่านต่อ

The 5534/2 is a low-distortion, low-noise device, having also the ability to drive low-impedance loads to a full voltage swing while maintaining low distortion. Furthermore, it is fully output short-circuit proof. วงจรแอมป์หูฟัง ที่เสียงดี ด้วยไอซี NE5532 อ่านต่อ