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Low power inverter circuit

pidja105

Oct 16, 2015
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Hello,
I built inverter from schematics attached, I attached pictures on breadboard and transformer I used.
But It does not work, it has no voltage on output of the transformer, on picture smaller transistor is npn and bigger is pnp, what I can change in the circuit in order to work?
 

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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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Do you have a circuit diagram and/or a web site you got the idea from?

Can you tell us about the transformer you've used?
 

Alec_t

Jul 7, 2015
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I would guess your transistors, or the 555, can't handle the current demand of the transformer primary.
Is that a hand-wound transformer? How many turns on the primary and secondary?
 

73's de Edd

Aug 21, 2015
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Sir pidja . . . . . . .

Check this referencing and see if the pin 2 and pin 7 improper assignment, as is being designated in RED LETTERING, might be relevant to your situation.
But it looks like your schematic is also in agreement . . . . .there must have been an earlier schematic which had those pins being interchanged.

http://www.sentex.ca/~mec1995/circ/555dcac.html


73's de Edd


.
 
Last edited:

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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pins 6 and 2 appear to be connected on the breadboard.

my suspicions are (in order of likelihood):

1) failure to oscillate
2) incorrect wiring of/to drivers
3) a problem with the transformer

Does anything get hot?

What is the input voltage and how much current is being drawn?
 
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