Electronics Help Care electronics circuit diagram

Amplifier circuit diagram using 2n3055 and mj2955: It’s the amplifier circuit diagram using 2n3055 and mj2955. this is PNP and NPN amplifier circuit. in this circuit, we can use 25-0-25 to 50-0-50 voltage. it needs dual voltage. positive negative and ground voltage. here used a 2n3055 transistor for the NPN …

How to make 3.7-volt battery charger: How to make 3.7-volt battery charger? This is the circuit diagram of the 3.7-voltage battery charger. this is an auto charger diagram. normally we can’t find a 3.7 voltage transformer to charge this battery. we got 5-voltage or 6-voltage chargers. we can find 5 …

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 …

how to make water level?: how to make 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 …

how to make mosfet amplifier: how to make 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 …

how to make a fan controller?:  how to make fan 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 …

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. …

how to make 12 volt inverter: 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 …

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 …