This is a 3.7-volt to 12-volt converter circuit diagram: 18650 model 3.7 voltage battery is a common battery. everywhere we can use this battery. the laptop used this battery. mobile power bank using this battery. Small hand fan using this battery. bicycle using this battery. many power banks are using …
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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 …
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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 …
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Sometimes we have to control our dc motor in 2 ways. like right and left, reverse and forward. We can buy a circuit to make it. But here is an easy way to control the motor. dc motor has positive and negative terminals. If we can change the terminal, then …
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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 …
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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 …
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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 …
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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 …
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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. …
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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 are used. 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. …
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Electronics Help Care Amplifier circuit diagram