Then apply the 12V 10A battery to this circuit and use the voltmeter to measure AC voltage output. Then, assemble all part on PCB as Figure 2. It is a upgraded version of 2n3055 circuit board with more power and sound quality. Powerful Stereo HI-FI Sound, 2 channel Stereo Input & Output. To begin with make the PCB or you can use the universal PCB. The 2N3773 power transistors designed for high power audio. This transformer, we may use secondary coil is the output voltage as you need, example we connects to the power amplifier that use AC 24 volts so we use AC 24V secondary coil etc. But there is load voltage will reduce to AC190Vģ.This circuit will has output as square wave form. Which normal I use 12V ct 12V makes the output voltage about AC 220V (no load). The primary coil of transformer use may use 9V CT 9V or 10V ct 10V or 12V ct 12V. But use need 100watt use must use 8A transformer so expensive for me.Ģ. Normally, use the 2-3A transformers for 20-30watt for the incandescent lamp. To increase current up to drive the output transistors Q7,Q8, then drive the transformer, finally to supply load.ġ. The output from divider circuit is sent to base of Q5,Q6. Because the generating the steady low frequency is very hard. Then this signal will sent to the two frequency divider makes the frequency is reduced down about 50HzĬause we don’t design the circuit to directly work at 50 Hz. It will generate the output frequency about 100 Hz at the collector lead of Q2. Let’s look at to both transistors Q1,Q2 will be connected together as the astable multivibrator form. Both transistors Q3,Q4 act as the frequency divider circuit The transistors Q1,Q2 act as the frequency oscillator circuit.Ģ. The maximum output power of this circuit about 100 watts, it is suitable for a normal lighting (all home lamps), also used for radio, mini TV, stereo or someone use it forįrom the schematic diagram in Figure 1 this circuit will include of 4 main section are:ġ. 500W power inverter circuit build using 10 pieces of well-known NPN power transistor 2N3055 to amplify the small AC signal produced by multivibrator module. Now they slowly become crystal controlled and that is a great advantage, because the. Someone use it in car or the high mountain etc. The cheap 433 MHz radio controlled switches/sockets had a one transistor regenerative receiver for years. It is designed for you that need to use appliances at outdoor or no electrical places. In this project, we will build a simple 12V power supply circuit using 2N3055. In the circuit high gain preamplifier, high-value bypass capacitor C 2 offers an almost short-circuit even to the lower frequency component and thus prevents loss of amplification due to negative feedback.Ĭheck out other preamplifier circuits posted in bestengineeringprojects.This circuit is 100 watt power inverter using power transistor 2N3055. A DC power supply takes AC from an outlet & converts it to regulated DC. The dc component of current through the resistor R 4 causes a dc voltage drop, which causes reverse bias at the emitter junction. Since the holes are just the lack of an electron, for the hole to move toward the collector, really, the surrounding electrons are moving out of the way. In a PNP transistor, current is carried by holes moving. As in a simple preamplifier circuit, the input signal is given to the base of transistor T 1 through coupling capacitor C 1. In a NPN transistor, current is carried by electrons moving from the emitter to the collector. Resistor R 1 and R 2 combination cross the Vcc supply and produce a positive dc voltage at the bias relative to the emitter. This biasing method is used because it produces excellent operating point stability. The circuit of the high gain preamplifier is built around a low-power NPN transistor T 1 which is here configured in common emitter mode using self-bias or emitter bias. Circuit Description of High Gain Preamplifier Circuit