Wiring schema blogs

 The PCB contains just 2 components:


1. 10uF electrolytic capacitor
Make sure you insert this component with the positive lead (the long wire) facing right, with the strip on the body facing left. Push it most of the way into the PCB.

2. M66T IC
This has 3 wires. Spread the wires slightly and insert it with the flat
part of the case facing left. Push it about halfway into the PCB


CONNECTING THE SPEAKER


Now connect 2 solid core wires of about 30mm in length to the speaker terminals. Solder the other end to the large copper pads on the underside of the PCB.

 Left shows how to connect the battery, switch and PCB together.
You will need to either cut the positive lead, or add another wire to link the micro switch to the PCB. It depends how much wire you need.
Connect the power leads by feeding them up through the large hole first, then through the smaller holes.

Have you been use the IC above? if those who have not, IC above is used or applied to the audio power amplifier. IC processing is quite good for use on amplifier home, or room. IC used is SI1020G who have not very high output with only 20W 8 ohm impedance speakers. Supply voltage ranging from 12 volt to 23 volts.

Below schematic audio amplifier with IC SI1020G

Part List

R1 = 100K

R2 = 1R

C1 = 2u2F

C2 = 100uF
C3 = 47uF

C4 = 10uF
C5 = 2200uF
C6 = 47uF

C7 = 100uF 

Simple Ni-cad charger Circuit Diagram uses constant current LEDs to adjust charging current. It makes use of LEDs that pass a constant current of about 15 mA for an applied voltage range of 2-18 V. They can be paralleled to give any multiple of 15 mA and they light up when current is flowing.The circuit will charge a single cell at 15, 30 or 45 mA or cells in. series up to the rated supply voltage limit (about 14 V).