12 Volt DC to 120 Volt AC Inverter

Ever needed a low power 120volt AC power source for your car, van or truck? Well this circuit should do the trick for you. It will supply 15 watts of AC power to a device. It should power lamps, shavers, small stereos and small appliances. If you draw too much power the circuit will shut down all by itself. The output of this circuit is a square wave so there may be some noticeable hum on audio units plugged into it. To reduce some of the hum increase the value of the output capacitor which is at .47uf now.

This circuit is designed to provide a low-power 120V AC power source suitable for use in vehicles such as cars, vans, or trucks. It is capable of delivering a maximum output of 15 watts, making it appropriate for powering small devices including lamps, shavers, small stereos, and other minor appliances.

The circuit employs a square wave output, which is essential for converting the DC input from the vehicle's battery to an AC voltage. However, this method of generating AC may introduce a noticeable hum, particularly when used with audio equipment. To mitigate this issue, an adjustment can be made by increasing the capacitance of the output capacitor, currently rated at 0.47 µF. This modification can help smooth the output waveform, thereby reducing the audible hum produced when audio devices are connected.

In terms of protection, the circuit incorporates an automatic shutdown feature that activates if the power draw exceeds the specified limit. This safety mechanism prevents potential damage to both the circuit and the connected devices by ceasing operation under overload conditions.

The circuit's implementation requires careful consideration of component ratings, particularly for the transformer and capacitors, to ensure reliability and safety during operation. Proper heat dissipation must also be addressed, especially if the circuit is expected to run for extended periods. Overall, this low-power AC power source circuit offers a practical solution for users needing portable power for small electronic devices while maintaining safety and efficiency.Ever needed a low power 120volt AC power source for your car, van or truck? Well this circuit should do the trick for you. It will supply 15 watts of AC power to a device. It should power lamps, shavers, small stereos and small appliances. If you draw to much power the circuit will shut down all by itself. The output of this circuit is a square wave so there may be some noticeable hum on audio units plugged into it. To reduce some of the hum increase the value of the output capacitor which is at .47uf now. 🔗 External reference