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Amplificador a Transistores 0.25 w a 0.5 w


works really well for me, is very easy to do, and inexpensive volume
beats many other devices!. It works with a voltage
from 3 to 12 volts, you should use a battery or power (if they manage to use it) 9v
Materials:
R1: A resistance violet red and golden yellow (4k7)
R2: resistor brown black green and gold (1M)
T1: A transistor BC548 or 2N3904 (the first is recommended)
T2: A transistor BC327 or 2N3906 (the first is recommended)
C1: A 10 uf capacitor
Swimming

one speaker cables 8 ohm, 0.5w recommended for 2 1 / 2 "
audio input:
click on the image to enlarge
signal and ground, then this will sevir in the diagram.

tin solder

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Diagram:



PCB:

Here is the pcb to make it to the plate (see tutorials)


to see the board finished here go