How to make a small amplifier: This is the circuit diagram for 20watts using tda2030. These chips run a 4Ω speaker at 18W or an 8Ω speaker at 14W. this circuit diagram runs with positive negative and ground voltage. we can use a maximum of 15-0-15 voltage. 12-0-12 voltage is …

Crossover circuit diagram: This is a Crossover circuit diagram. here have one output for the bass speaker. one for the mid-range speaker. and one for tweeter output. why do we need a crossover for the soundbox? if we don’t use crossover in the soundbox then we lost the tweeter and …

Headphone amplifier: This is a Headphone amplifier circuit diagram. sometimes we need an amplifier for our headphones because of the low sound volume. some tv has no headphone output line. there have only one audio pre-out for another amplifier. there we need this circuit diagram. this circuit runs with 5 …

Transistor amplifier circuit diagram: This is a transistor amplifier circuit diagram. it’s the basic circuit. transistor makes small to big. small sound to a big sound. transistor only makes small to big. there are two types of transistors. PNP transistors and NPN transistors. The PNP transistor is a negative transistor …

Bass tone circuit diagram: This is a Bass tone circuit diagram. this is a simple circuit. it’s a very simple circuit diagram. but the quality is very good. it’s making our amplifier quality full. we can control the sound using this circuit. here used 3 100k volumes. one for Bass …

Music light for the amplifier: This is the music light for the amplifier. this circuit is for the amplifier. this circuit we use in the amplifier. this light can make the amplifier look nice. here used a Kia6966s. this Ic has 5 led outputs. this circuit run 6 to 12 …

how to make a speed controller for a dc motor: This is a simple circuit diagram for speed control for a dc motor. We can control the motor rpm as we want. here use one transistor only. C2072 is an NPN transistor. it’s a positive transistor. BCE transistor. we also …

how to make a voltage divider: This is a circuit to divide the voltage to make an amplifier. here used one transformer. one full wave transformer—50-0-50 voltage. but this circuit makes 100-50-0-50-100 voltage. sometimes we need dual power to make an amplifier. some amplifier circuits need dual power low and …

Fan regulator circuit diagram: This is a fan regulator circuit diagram. we can control our fan using this circuit. not only the fan. we also can control the light. this circuit will work under 100 watts and Ac220 volts.    here used one transistor BD136. one 104j 250 volts pf. …

Push-pull amplifier: This is push pull amplifier circuit diagram. input and output base amplifier. here used 2 transformers. One is an input transformer and the other is an output transformer. used 12 voltage only. we can use the battery for this amplifier.  here used PNP transistors. 2n2955 is the best …