Pakistan Science club's DIY project Homemade inverter ups
Video Part One
Video Part two
Video Part One
REQUIRED THINGS MADE
A SIMPLE INVERTER:
1. 12 by 12 Volt
transformers.
2. 2 Transistor
(1047).
3. Copper wire for
winding OR for an additional coil (Note: The number or gauge of copper wire
must be identical as that of secondary coil of transformer).
4. Vero-board.
5. 2 (1 k-ohms)
resistance.
6. 2 Heat sinks.
7. Wires.
8. Screws or nuts.
9. Paper.
10. Battery as the input or source.
TOOLS REQUIRED:
1. Solding iron with
solding wire.
2. Multimeter.
3. Screw driver.
PROCEDURE:
1. First we have to
do winding (additional coil) in between the gaps of the transformer in the
direction of secondary coil (decide whether the coil of secondary coil is in
clockwise or anti-clockwise).
2. Use a paper strip
to cover the coils of the transformer.
3. Give 5 turns to
the wire in direction of secondary coil, at the center twist the wire in order
to make a third or center terminal, then again give 5 more turns. In this
manner you will get three terminals. The purpose of making these three points
is that we can use our transistor easily which is of three terminals, more ever
the one is for pulse generation while the other two serve as the load terminals.
4. Now find the base
of the transistor by connecting it with multimeter i.e. the terminal which
gives reading on both of the other two terminals when positive end of the
multimeter connects to it. Mark the base by either slight twist or another
means so that you can remember it easily.
5. Take a Vero-board
and insert the two transistors in it and sold them.
6. Join the pieces of
wire at base and emitter of the both transistors by means of solding.
7. Connect the
collector of the transistors with one another with the help of wire.
8. Sold the
resistance of 1 k-ohms between collector and emitter of each transistors.
9. Join the heat sink
with both of the transistors with the help of screw or nuts.
10. Join the emitter of the transistor with one terminal of
the secondary coil (transformer), similarly for the other one.
11. Connect the base of the transistor with one end of our
additional coil, in the same manner for other end. (Note: The connections are
made with the starting and ending terminals of the additional coil and not with
the center or twisted one).
12. Now join the wire with center terminal of the secondary
coil (transformer) which would act as the positive terminal for the input (Join
it with positive terminal of battery). Similarly join another wire with the
twisted end (the center terminal of additional coil) which along with collector
wire will serve as negative terminal for input (Join it with negative terminal
of battery).
13. The load will be connected at the base terminals of the
transistors which were already joined with the terminals of the additional
coil.
14. The simple inverter is ready to test now. With help of
some changing, it can easily be converted into a UPS.
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