Small audio amplifier circuit: This is a Small audio amplifier circuit diagram.LM1875 is a monolithic power amplifier offering. it’s 30Watts Output Power. very low distortion and high-quality performance. The LM1875 delivers 20 watts into a 4Ω or 8Ω load. ±25V supplies can make 30 watts.  Supply Range 16V-60V The LM1875 …

Driver transistor amplifier circuit : This is a Driver transistor amplifier circuit. this is only the driver board. we need the main transistor to make the sound. we can use transistors according to our needs. one pear transistor ( 2sc5200 and 2sa1943) can make 150 watts. if we want 300 …

Audio amplifier circuit using TDA2030: This is the Audio amplifier circuit using TDA2030. this diagram can make 30 watts. we can use 12-0-12 voltage to 18-0-18 voltage. it’s a mono diagram. here used dual TDA2030 IC. This diagram is in bridge mode.    This is the diagram The list of …

Amplifier circuit using stk412-150: This is one of the best Amplifier circuit using stk412-150. this diagram can make 200+200 watts. using 70-35-0-35-70 voltage. positive high positive low, negative high, and negative low voltage are used here in this diagram. stk412-150 ic can make 200+200 watts using dual voltage. it’s a …

soft power on the circuit: This is soft power on the circuit diagram for the amplifier. every amplifier needs this circuit for soft stater. this circuit switches on the amplifier in a soft mode. sometimes we can see some amplifier makes a noise when the amplifier is switched on. if …

12 voltage amplifier 50 watts: This is a 12 voltage amplifier 50 watts. this circuit can make 20 watts + 20 watts. it’s a stereo circuit diagram. this circuit runs with 12 voltages. we can use this circuit in the car amplifier. C1/C2=47uf 25volts. C3/C4=1uf 25 volts. C5=220uf 25volts. R1=3k9. …

surround amplifier circuit: This is a surround amplifier circuit diagram using tda7294. this circuit can make 100 watts in bridge mode. this circuit is a mono diagram. here needs positive negative and ground voltage.  we can use 15-0-15 to 35-0-35 voltage. if we need stereo we have to use a …

speaker crossover circuit: This speaker crossover circuit is for bass speaker mid speaker and tweeter. we have to use this circuit to protect the speaker and tweeter. if we don’t use this circuit then the tweeter will burn. and the sound also will not be good. every soundbox needs this …

Adjustable power supply:  This is an adjustable power supply. we can adjust the voltage using this circuit. it’s an easy circuit diagram. here use lm317 ic. we can adjust 1.25 voltage to 37 voltage and 1.5 amperes. this circuit is only for DC voltage. transistor circuit diagram of 2sa1943 and …

Capacitor voltage calculation: This is the Capacitor voltage calculation list. we can learn the value code from this photo. ceramic capacitor got only the value code. we have to know the code value. we can see here that this circuit has 2 capacitors. both are different value codes. like 1A …