2000-5000W INVERTER

THIS CIRCUIT IS SIMPLE YET MUST BE BUILT PROPERLY TO AVOID FIRES 
AND MELTDOWN.

THE OUTPUT IS A MODIFIED SQUARE WAVE THAT RUN ALMOST 
ANYTHING INCLUDING COMPUTERS AND MONITORS.

MOST PARTS IN THIS CIRCUIT CAN BE SUBSTITUTED WITH OTHER SIMILAR 
PARTS…EXAMPLES ARE:

OPTO COUPLERS, MOSFETS, MAIN POWER TRANSFORMER, DIODES, ETC…

DON’T BE AFRAID TO EXPERIMENT WITH DIFFERENT VALUES TO OBTAIN 
BETTER EFFICIENCY AND MORE STABLE OUTPUT.

BELOW IS THE ENTIRE PARTS LISTING…

R1, R2=4K7		R3=18K	R4=47K	R5, R10=10K	
R6=2K			R7, R8, R12, R14, R15=1K		R9=12K
R11=10 ohms		R13=10MEG		R16, R18=1K8
R17, R19=22 ohms	R20, R21=100 ohms		R22=100 ohm 8W M-film
(ALL RESISTORS ARE 1W UNLESS STATED)

C1, C8, C12=100nanoFarad polyester
C2, C5, C6, C9, C10, C11=100uFarad 25V electrolytic
C3, C4, C7=1nanoFarad Polyester
C13=47PICO CERAMIC
C14=68PICO CERAMIC
C15, C16=2.2uF 63V metallised polyester film
C17=30uF 220vac 60hz motor capacitor
C18=22000uF 16v electrolytic
C19=0.22uF 250vac class X capacitor (basically a filter capacitor for ac line)

D1, D3, D4, D5=BA157  1AMP fast recovery rectifier diodes
D2, D7=5MM GREEN LED
D6, D12, D13, D14, D15=1N4002
D8, D9, D10, D11=BZX88C12V (basically 12v zener diodes at 2-4amps each)
D16=6AMP 50V RECTIFIER DIODE

Q1, Q2=IRFZ44 (TRY TWO IN PARALLEL IF ONE DOESN’T WORK) OR IRF640 
POWER MOSFETS

IC1=7808
IC2=SG3524
IC3=555 TIMER IC
IC4=4060B
IC5=4017B
IC6=4071B
IC7, IC8=4N35 OPTO COUPLER

L1=1000uH 1.1AMP CHOKE
L2, L3=10uH MIN AXIAL CHOKE
L4=7.5mH x2 common mode choke, 8amps rated
L5=2.4mH 8amp toroidal choke
T1=1000VA-2000VA inverter transformer**see note at bottom of pages.
FS1=400milliamp glass fuse
FS2=250milliamp glass fuse
FS3=30A HRC CERAMIC FUSE X3 CONNECTED IN PARALLEL
FS4=8AMP HRC CERAMIC FUSE
X1=3.8-4MHZ CRYSTAL (actual value should be 3.93216mhz).
VDR1=25KOHM 1W RESISTOR
LP1=NEON LAMP WITH 200OHM RESISTOR



Note about T1.

T1 should be either a store or surplus bought 24vct to 120vac 1000-2000va transformer.
Or
You can custom wrap your own transformer for better performance.

Try this:

50 turns 20ga magnet wire center tapped as the primary.
250 Turns 14-12ga magnet wire as the secondary.
All wrapped on a common laminated iron transformer form.

THIS CIRCUIT CAN BE MADE MUCH SIMPLER BY SIMPLY REPLACING THE 
PULSE FORMING CIRCUIT INVOLVING IC4 AND IC5 WITH A SIMPLE 2 
TRANSISTOR PUSH PULL MULTIVIBRATOR CIRCUIT CONNECTED TO IC7A 
AND IC8A…OF COURSE TIMED FOR PROPER 60HZ OUTPUT.




COPYRIGHT UU ELECTRONICS 1999