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» » »The simplest inverter 1.5 V - 220 V
I have not seen an inverter circuit easier than this. For repetition, you need a minimum of parts - there are no more than 10 pieces. To obtain a voltage at the output of 220 volts, we need one finger battery with a voltage of 1.5 volts.
The simplest inverter 1.5 V - 220 V

Inverters are needed where there is no way to connect to a 220 volt network. Inverters are divided into two types: some have a sinusoidal voltage of 50 Hz at the output and are suitable for almost any load. The other modified one has a high frequency output, of the order of 500-10000 Hz, and not always a sinusoidal waveform.
Inverters with a sinusoidal frequency of 50 Hz are expensive, because a large transformer or a simulation electronics unit is needed to generate a sinusoidal pulse of 50 Hz.
The simplest inverter that we will do is in the second group. And it is suitable for powering various switching power supplies, such as a phone charger, an energy-saving light bulb - fluorescent or LED.

Required Components

Transformer 220V - 6V. You can tear it out of an old tape recorder, receiver, etc. or buy here -
AA Battery Case - 1 -
Switch - 1 -
Circuit Board - 1 -
BC547 transistor (domestic analog of KT3102, KT315) - 1 -
BD140 Transistor with a radiator (domestic analog of KT814, KT816) - 1 -
Capacitor 0.1 uF - 1-
30 kOhm resistor - 1 -
Soldering iron, if suddenly you don’t have it here -

The simplest inverter 1.5 V - 220 V


We begin our acquaintance with the inverter with a circuit. This is a common multivibrator on a composite transistor. The result is a generator at the output of which there is a step-up transformer.
Putting the circuit together. The board is a breadboard with a lot of holes. We insert the parts and seal them with jumpers according to the scheme.
The simplest inverter 1.5 V - 220 V

Work check

If all components of the circuit are serviceable, and the circuit is assembled without errors, then the inverter starts working immediately and does not need to be configured.
The simplest inverter 1.5 V - 220 V

The simplest inverter 1.5 V - 220 V

We connect an energy-saving lamp to the inverter output. We insert the battery and close the switch. The light comes on.
The simplest inverter 1.5 V - 220 V

Of course, its brightness is lower than when powered by a network, but the fact that it works from an element with a voltage of 1.5 volts is a breakthrough!
Naturally, like everywhere here, the law of conservation of energy applies. Based on which it follows that the current in the battery circuit will be several times higher than in the bulb circuit. In general, the battery must be alkaline, then there is a chance that it will work a little longer.

When mounting and working with the inverter, be especially careful, the voltage of 220 volts is life threatening. And, believe me, 1.5 volt batteries are enough to deliver a shocking electric shock to a person, and even cause a cardiac arrest. As you know, for this it is enough to pass about 100 mA through a person, which this inverter is quite capable of.
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Comments (9)
  1. Petrovich
    #1 Petrovich Guests February 15, 2018 16:36
    Is it possible to connect a lithium-ion battery to such an inverter?
  2. Petrovich
    #2 Petrovich Guests February 21, 2018 17:48
    Is it possible to connect a battery of about 6 volts (lead) to such an inverter? Does it not burn? or maybe there is another simple but interesting scheme?
  3. Tolik
    #3 Tolik Guests March 24, 2018 16:41
    It is possible to use lithium-ion and 6V, only the resistors must be selected and the output transistor may have to be more powerful. But in general, it is better to use a 2-stroke multivibrator with field-effect transistors. From 1 can of lithium, you can easily get 20-30W. For details, 2 fetas, 2 resistors, 1 inductor, 4 diodes and a small Conder will be released.
  4. sergeiva13
    #4 sergeiva13 Guests April 7, 2018 10:39 p.m.
    Dear author, in all home-made products they are trying to make a powerful high-voltage source of high voltage. And for me, for home-made work, a low-power high-voltage regulated source is needed. I've already done a lot of such, but my record is 200 mW. And I would like - less. Can you tell me?
    Yes, login via facebook - failed. Do it. an exception.
  5. ag
    #5 ag Guests July 21, 2018 18:48
    how to raise the power of this simple circuit to 1000 watts ?????
  6. putnik
    #6 putnik Guests August 20, 2018 17:16
    The author is burning!))
    Let's say a light bulb consumes 10 watts. let's say that the efficiency is 75%. as a result, when recalculating to the primary winding, we have a current consumption from a finger battery in the region of 9 amperes!))) show me such a battery. I am silent about the maximum currents of the collector.
  7. zOMBY sTAR
    #7 zOMBY sTAR Guests December 19, 2018 04:55
  8. Guest Pavel
    #8 Guest Pavel Guests December 24, 2018 15:57
    at the output there is a high-frequency arc voltage but the lamp does not light either the LED or the housekeeper
  9. Karbofos
    #9 Karbofos Guests May 24, 2019 04:11
    Even if we have a battery, then little can be squeezed out of the circuit. Suppose we have 2700 mAh, within an hour we get a current of 2.5A (rounded for stock). This is a power of 3.75 watts. Converter efficiency in the best case of 50 percent, then the output power 1.8 watts. What can be powered by this is a big question ...
    And yes - I did the conversion on the finished transformer in a 2-stroke circuit and with 12V power. He could only pull out a candle in the wind neon lamp at a voltage of 90V (instead of 220) and an efficiency of less than 40%.
    There is a mismatch between the parameters of the “accidentally turned up” transformer and circuit requirements, because in a similar push-pull circuit, but with the corresponding transformer, 15W was squeezed out at an efficiency of about 80% (the load is the same saving time).

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