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This is a Simple But  low-power inverter uses only 9 parts and turns 10 to 16 Vdc into 60-Hz, 115-V square-wave power to operate ac equipment up to 25 W. The first section of the 556 timer chip is wired as an astable oscillator with R2 and C1 setting the frequency. The output is available at pin 5. The second section is wired as a phase inverter. Low-Power Inverter Circuit Diagram:  That output is available at pin 9. Resistors R3 and R4 keep output transistors Q1 and Q2 from loading down the oscillator. The two transistors drive the transformer push-pull fashion. When one transistor is biased-on, the other is cut-off. The transformer is a 120 V/18 VCT unit that is connected backwards, so that it steps the voltage up rather than down. Oscillator circuit U1, R1, R2, and C1 operates from about 4 to 16 V with a very ~stable output.

This is simple and Low-cost Electronic Circuit Project of Multiple Output DC Converter Circuit Diagram . A DC converter circuit taking one single DC input and converting to parallel multiple DC outputs. Simple But Multiple Output DC Converter Circuit Diagram: Circuit Project Notes : This circuit uses a single DC input (nominally 12 Volt) and converts to four simultaneous output voltages of 9, 6, 5 and 1.5 Volts. The output voltages are controlled by common 78xx series regulators, offering 9, 6 and 5 Volt DC outputs. The 1.5 Volt supply is derived using an LM317 regulator. To reduce power and heat the LM317 is fed from the 5 Volt regulator output. The LM317 output is calculated from: Vo = 1.25 (1 + R1/R2) With R1 200 ohms (use 180 plus 22 ohm in series) this works out to be 1.5 Volt. F2,3,4,5 are the output fuses and are set at 500 mA (0.5 A). If the full 500mA is taken from each output then the DC input supply must be capable of sourcing at least 2 Amp. LED 1 illuminates to show the ci...

This is a heavy duty but low-cost Electronic Circuit . The operation amplifier A1 directly drives the VN64GA with the error signal to control the output voltage. Peak rectifier Dl, CI supplies error amplifier A1 and the reference zener. This extra drive voltage must exceed its source voltage by several volts for the VN64GA to pass full load current. Heavy Duty But Low-Cost Battery charger Circuit Diagram: The output voltage is pulsating dc which is quite satisfactory for battery charging. To convert the system to a regulated dc supply, capacitor C2 is increased and another electrolytic capacitor is added across the load. The response time is very fast, being determined by the op-amp. The 2N4400 current limiter circuit prevents the output current from exceeding 4.5 A. However, maintaining a shorted condition for more than a second will cause the VN64GA to exceed its temperature ratings. A generous heat sink, on the order of 1°C/W, must be used.