amplifier circuit board using 12 volts: This is an amplifier circuit board using 12 volts. it’s an easy circuit. this circuit can make 10 watts like that. this circuit is for learning people only. here used 3 transistors. 2 transistors for the main and one for the driver transistor.  On …

bass tone circuit board: This is a bass-tone circuit board for the amplifier. here in this circuit no need for any voltage. it’s only the controller without the pre-amplifier. it is good to use a pre-amplifier with this circuit diagram. but sometimes there has no voltage. like if we want …

How to make 5 voltage using tip41c: This is a 5-voltage circuit diagram for the Bluetooth card or charging 4.2-volt battery. or anywhere we want. we can use 7805 to make 5 volts. but 7805 can make half amperes. Sometimes we need more amperes. here used tip41c transistor. this transistor …

How to make ac to dc: this is the circuit diagram for making ac to dc voltage. this is a step-down transformer. always we have to use a step-down transformer to use the voltage. our primary voltage is ac 220. normally we need lower voltage. like 12 volts /24 volts …

How to Build Step-Down Transformers with Calculations: here we are going to build a step-down transformer. this is a classic transformer. classic transformer made by E-core and the I-core. this type of transformer has a bobbin. we wind the wire to this bobbin. we have to calculate the bobbin size.  …

How to make 12-voltage SMPS: This is the 12-voltage SMPS circuit diagram. this is an easy circuit. used here KLY MK-21C Universal Power as the MOSFET. first makes ac 220 to Dc voltage 350. then the dc voltage goes to the transformer using this KLY MK-21C Universal Power. the transformer …

How to make 5 voltage: This is a circuit diagram to make strong 5 voltage. normally we use 7805 to make 5 voltage for audio Bluetooth cards or others. but 7805 makes 500ma amperes. but sometimes we need 2 amperes. then we can use this circuit. this circuit can make …

Adjustable voltage regulator using lm317: This is an adjustable voltage regulator using lm317. we can control the voltage from 1 to 35 voltage. if we use 12 voltage then we can control from 1 to 12 voltage. if we use 24 voltage then we can control from 1 to 24 …

12 voltage audio amplifier: This is 12 voltage audio amplifier circuit diagram. this circuit can use 12 voltage battery. we can use this amplifier in the car. normally the transistor needs dual voltage. like positive negative and ground. but here needs only positive and negative voltage. we can use 8 …

How to save Tweeter horn speaker: This is the circuit diagram to protect the tweeter horn speaker. this problem is a common problem. if we don’t use a capacitor to the tweeter then the tweeter will be burned. normally we use the bass speaker and the hi speaker and the …