Equalizer circuit diagram 7band: This is an Equalizer circuit diagram 7band. this board is for mono audio. if need a stereo then have to use a two-circuit. here no need for any voltage because it’s a passive circuit. every amplifier needs a good-quality graphic.  All voll will be 100k and …

Amplifier circuit diagram using Mosfet: This is an amplifier circuit diagram using MOSFET. here used Irf9530 and Irf930. Irf9530 is a positive mosfet and Irf930 is a negative mosfet. this circuit can make 200 watts maximum. here used 50-0-50 voltage and 5 amperes.  this is a mono board. if we …

Low Mid and High Circuit Diagram: This is a Low Mid and High control circuit board. this diagram is so easy and simple. it’s a mono-circuit diagram. it’s without a pre-amplifier circuit. this circuit does not need power because it’s without a pre-amplifier. it can control low frequency, high frequency, …

Password Switch: This is a security system for any electric goods. like light, motor, fan. sometimes we need a password for the light or motor. for this situation, we can use this type of switchboard. like used 10 switches 5 will be on and another 5 will be off. then …

Turbo Bass Circuit: This is the Turbo Bass Circuit diagram. this circuit makes the extra bass. This is also a pre-amplifier. we need this type of board for the subwoofer. low-pass filter also for subwoofer but this circuit is different board. this circuit works with 2.0 stereo sound but the …

100 watts amplifier circuit: This is a 100-watt amplifier circuit diagram using TDA7294. this is one of the popular diagrams. we can get 100 watts from this board. here we can use 15-0-15 voltage to 45-0-45 voltage. we will get the watts according to the using voltage. this is a …

How to make running light: This is a running light circuit diagram. it’s a simple diagram. this circuit runs with 5 voltages only. it has 5 LED lights. Ne555 is very widely used in many electronic projects, like using timers and also as well as LED control circuits. like this …

Mid-low high circuit diagram: This is the Mid-low high circuit diagram. this is one of the best single-voltage pre-amplifiers. here used 9 voltage. this is a mono board. if we need stereo then we have to use dual board for the dual side.  Component list: P1=0.022, P2=0.022, P3=100pf, P4=0.1, P5=0.01, …

Amplifier circuit using stk4141: This is an amplifier circuit using stk . in this diagram, we can use stk4141 to stk4191. this diagram can make 50+50 watts using 4191. we can use 25-0-25 voltage to 50-0-50 voltage according to the Ic, here, we need dual voltage: positive ground and negative …

Refrigeration system: This is a refrigeration system diagram. this is the raw diagram for the refrigeration system. every air condition or freeze are the same diagram. there will be an air compressor and 2 condensers. One is the hot condenser and the other one is the cold condenser. there we …