How do I make a DC motor turn left and right: Sometimes we have to control our dc motor in 2 ways. like right and left. we can buy a circuit to make it. but here have an easy way to control the motor. dc motor has positive and negative …

how to use diode and capacitor: here is the diagram for using diodes and capacitors. this circuit is for making amplifier voltage. making an amplifier needs dc voltage. here we use a transformer to make ac 220 to 50-0-50 voltage. this transformer is a step-down transformer. here used a diode …

Water level indicator: This is a water level indicator circuit diagram. this circuit can use anywhere for water or oil levels. here used only 3 led for 3 levels. if we want to make more levels then we can increase more transistors and LED. here used NPN bc547 transistor. this …

MOSFET amplifier circuit diagram: This is a MOSFET amplifier. normally we use the transistor amplifier circuit diagram. but here in this circuit, we have to use MOSFET. MOSFET amplifiers are high-power amplifiers. we can use big voltage and amperes in this circuit. this circuit has 2 MOSFET. we are using …

Automatic fan controller:  This is a simple temperature controller circuit diagram. here used PTC C831 to control the room temperature.  this PTC works as a resistor. PTC resistor depends on temperature. this PTC is used in this automatic fan controller. Negative Temperature Coefficient (NTC) thermistors have less resistance at higher …

how to make a low pass filter for a subwoofer: this is a circuit for driving only a bass amplifier. this circuit makes bass only. when we use a sub-woofer.  every subwoofer needs a bass amplifier. every bass amplifier needs this circuit to make only bass. it’s called a low-pass filter. …

12-volt inverter circuit: This is a 12-volt inverter circuit. it’s a simple inverter circuit diagram. here used 2 MOSFET. IRFZ44. It’s a good quality MOSFET. it needs 12 voltage full-wave transformer. 12-0-12 voltage transformer. 12-0-12 voltage 10 amperes transformer needed. we know voltage X amperes=Watts. so, 12 X 10= 120 …

How to make pure DC voltage: This is a circuit to make ac to dc voltage. we make dc voltage using a diode. and we make pure dc to using a diode and capacitor. we use a transformer according to our needs. we make primary section and secondary section. primary …

Speaker Protection circuit diagram: This is a Speaker Protection circuit diagram. every amplifier needs this circuit. when the amplifier got any problem then this circuit disconnects the speaker. when the IC or transistor got a short circuit, then the voltage comes out from the audio output. to protect the speaker …

speaker crossover design: This is a crossover circuit for a speaker and tweeter. every soundbox needs this circuit to protect the tweeter and speaker. we have to use this circuit to protect the tweeter.  this is a speaker crossover design. Here we can see sound comes from an amplifier. the …