This is an inverter/converter, it convert 12V of the battery into 110/220V DC (Not AC).
The output voltage is adjustable from 0 to 300V DC.
It has a feedback loop to maintain the output voltage constant regardless of input voltage / load change.
It also has under voltage protection to shut down the inverter when the battery voltage drops below 10.5V.
Efficiency was 78.95% for me but you can try different transformers with different frequencies for higher efficiency.
Maximum output power could be 200 watt to 500 watt depends on the size of the transformer, but since the output is DC you can connect many inverters in parallel to increase the power !
This inverter can not be used with induction motor or any load that need AC voltage only (such as old power supplies with 50/60Hz transformer),
The load could be LED light bulb, Incandescent light bulb, TV, Laptop charger, Phone charger, Universal motor, Blender, printer, Inverter Ceiling fan (BLDC Fan), Drill ... etc.
Parts list:
IC TL494
IC CD4093
Fast Recovery Bridge rectifier D4SBL40
MOSFET IRFZ44n (2 pcs)
Zener diode 10V 0.5Watt
Diode 1N4148 (2pcs)
Potentiometer WH148 - 10K
Multiturn Potentiometer 3296W - 2K
Multiturn Potentiometer 3296W - 1M
Capacitor 4700uF 16V
Capacitor 47uF 400V
Ceramic Capacitor 2nF
Ceramic Capacitor 100nF (2pcs)
Resistor 1K 0.25Watt (2pcs)
Resistor 100K 0.25Watt (4pcs)
Resistor 22K 0.25Watt
Resistor 27K 0.25Watt
Resistor 10K 0.25Watt (4pcs)
Resistor 4.3K 0.25Watt
Resistor 33ohm 0.25Watt (2pcs)
Ferrite transformer center taped 12-0-12 to 220V 300 Watt (FB30-12)
IC Socket 14 DIP
IC Socket 16 DIP
Heatsink for Mosfets (2pcs)
Heatsink for Bridge rectifier
DC Fuse 30A (Car fuse)
DC voltmeter (optional)
Terminal connector HB-825 2P
Knob for the Potentiometer
Universal US UK EU AC Power Panel Outlet
Circuit:
Note: do not use regular bridge rectifier, only fast recovery one !
Watch this video for more details: