Amplifier circuit using TDA2005: This is the amplifier circuit using TDA2005. Here are three diagrams using the same IC. 2 diagrams are stereo. One is the bridge mode. The stereo diagram makes 10+10 watts. And bridge mode makes 20 watts. The voltage should be no more than 15 volts.    …

Amplifier circuit diagram using TDA2005: This is an amplifier circuit diagram using TDA2005. It’s a complete audio circuit board. mono board. This board can make 25 watts in bridge mode. 12-volt-operated audio board. It’s also with a pre-amplifier and bass treble controller. Here are 3 adjustable volumes: 1st one for …

Amplifier circuit diagram using ECG1355: This is an amplifier circuit diagram using ECG1355. ECG1355 hybrid power amp module. probably 35 years old IC. This board can make 100 watts. It’s a mono audio board. The stereo needs a dual circuit. Here needs a minimum of 30 volts to 60 volts. …

Amplifier circuit diagram using STK490-310: This is an amplifier circuit diagram using STK490-310. This board can make 20W+20W to 75W+75W. The voltage is 35-20-0-20-35 to 50-30-0-30-50. STK490-040 TO STK490-110 voltage should be 35-20-0-20-35 volts. and STK490-140 to STK490-340 voltage should be 50-30-0-30-50 volts.  We can use STK490-040,STK490-070,STK490-090,STK490-110,STK490-140,STK490-220,STK490-310,STK490-340 ic in this …

Amplifier circuit diagram using STK4199MK2: This is an amplifier circuit diagram using STK4199MK2. It’s a 2.1 audio circuit. It has 3 inputs and 3 outputs. Left speaker + Right speaker and the Subwoofer output. Voltage needs 55-35-0-35-55. Positive voltage high and low. negative voltage, high, and low. This diagram has …

Amplifier circuit diagram using TDA7370: This is an amplifier circuit diagram using TDA7370. Here are 2 circuit boards. One is a 4-input and 4-output, and Another is a 2-input and 2-output. Normally, it’s for car audio. we can get 8+8+8+8 watts and 18+18 watts using 12 voltage.  Audio amplifier circuit …

DIY amplifier circuit diagram using STK4148: This is a DIY amplifier circuit diagram using STK4148. Hybrid-IC STK4048V. This is a mono power amp. The circuit output power is 150 watts. We can use a minimum 40-0-40 voltage to 87-0-87 voltage. To make stereo, we have to use the dual board. …

Power amplifier circuit diagram using STK4040: This is the Power amplifier circuit diagram using STK4040. This board can make 100 watts. It’s a mono diagram. we can use 30-0-30 voltage to 45-0-45 voltage. For stereo needs dual board. In this diagram can use STK4024V,,STK4026V,STK4028V,STK4028X,STK4030V,STK4030X,STK4032V,STK4032X,STK4034V,STK4034X,STK4036V,STK4036X,STK4036XI,STK4038V,STK4038X,STK4038XI,STK4040V,STK4040X,STK4040XI,STK4042II,STK4042V,STK4042X,STK4042XI,STK4044II,STK4044V,STK4044X,STK4044XI. this all STK.      Class …

Class-D power audio amplifier 500 watts: This is a Class-D power audio amplifier 500 watts. This circuit diagram can make a maximum of 600 watts using 200 volts. It’s a mono circuit diagram. Here, use IRS20124’s IC for the driver circuit. and an IRFP260N MOSFET  for the output. This circuit …

Class d amplifier circuit using IRF250N: This is a Class d amplifier circuit using IRF250N. This diagram can make 300 watts of output. It’s a mono audio diagram. Here, use IRS2011 for the driver IC, and the IRF250N MOSFET for the output. This MOSFET can make 150 watts. Here, use …