The simplest inverter 1.5 V - 220 V

I have never seen an inverter circuit simpler than this one. To repeat, you will need a minimum of parts - no more than 10 pieces. To obtain an output voltage of 220 volts, we need one 1.5 volt AA battery.
The simplest inverter 1.5 V - 220 V

Inverters are needed where it is not possible to connect to a 220 volt network. Inverters are divided into two types: some have a sinusoidal output voltage with a frequency of 50 Hz and are suitable for powering almost any load. Other modified ones have a high output frequency, about 500-10000 Hz and not always a sinusoidal waveform.
Inverters with a sine wave frequency of 50 Hz are expensive, since a large transformer or simulation electronics unit is needed to generate a 50 Hz sinusoidal pulse.
The simplest inverter that we will make belongs to 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 - aliexpress
AA battery case - 1 - aliexpress
Switch - 1 - aliexpress
Printed circuit board - 1 - aliexpress
BC547 transistor (domestic analogue of KT3102, KT315) - 1 - aliexpress
BD140 Transistor with radiator (domestic analogue of KT814, KT816) – 1 - aliexpress
Capacitor 0.1 µF – 1- aliexpress
30 kOhm resistor - 1 - aliexpress
Tools:
Soldering iron, if you don’t have it, take it here - aliexpress

The simplest inverter 1.5 V - 220 V

Scheme


Let's start getting acquainted with the inverter with a diagram. This is an ordinary multivibrator based on a composite transistor. The result is a generator at the output of which there is a step-up transformer.
Let's put together a diagram. The board is prototyping, with a lot of holes. We insert the parts and solder them with jumpers according to the diagram.
The simplest inverter 1.5 V - 220 V

Checking work


If all components of the circuit are in good working order, and the circuit is assembled without errors, then the inverter starts working immediately and does not need adjustment.
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. Insert the battery and close the switch. The light came on.
The simplest inverter 1.5 V - 220 V

Of course, its brightness is lower than when powered from the mains, but the fact that it operates from a 1.5-volt element is a breakthrough!
Naturally, as everywhere else, the law of conservation of energy applies here. Based on this, it follows that the current in the battery circuit will be several times higher than in the light bulb circuit. In general, the battery must be alkaline, then there is a chance that it will work a little longer.

When installing and working with the inverter, be especially careful, the voltage of 220 volts is dangerous to life. And, believe me, a 1.5 volt battery is enough to give a person a devastating electric shock, and even cause cardiac arrest. As you know, to do this it is enough to pass about 100 mA through a person, which this inverter is quite capable of.
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Comments (16)
  1. Petrovich
    #1 Petrovich Guests 15 February 2018 16:36
    6
    Is it possible to connect a lithium-ion battery to the input of such an inverter?
  2. Petrovich
    #2 Petrovich Guests 21 February 2018 17:48
    1
    Is it possible to connect a battery of about 6 volts (lead) to such an inverter? Will it not burn out? or maybe there is another simple but interesting scheme?
  3. Tolik
    #3 Tolik Guests 24 March 2018 16:41
    4
    You can use both lithium ion and 6V, you just need to select the resistor values ​​and you may have to install a more powerful transistor at the output. But in general, it is better to use a 2-cycle multivibrator using field-effect transistors. From 1 can of lithium, you can easily get 20-30W. The parts will include 2 feta, 2 resistors, 1 inductor, 4 diodes and a small condenser.
  4. sergeiva13
    #4 sergeiva13 Guests 7 April 2018 22:39
    2
    Dear author, in all homemade products they are trying to make a powerful high-voltage high-voltage source. And for me, for homemade work, I need a low-power, high-voltage adjustable source. I've already done a lot of these, but my record is 200 mW. I would like it to be less. Maybe you can give me some advice?
    Yes, logging in via facebook failed. Please do it. exception.
    Sincerely.
  5. ah
    #5 ah Guests 21 July 2018 18:48
    6
    how to increase the power of this simple circuit to 1000 watts?????
  6. putnik
    #6 putnik Guests 20 August 2018 17:16
    8
    The author is burning!))
    Let's say a light bulb consumes 10 watts. Let's say the efficiency is 75%. As a result, when converted to the primary winding, we have a current consumption from a finger-type battery in the region of 9 amperes!))) show me such a battery. I am silent about the collector current limits.
  7. zOMBY sTAR
    #7 zOMBY sTAR Guests December 19, 2018 04:55
    2
    IS THE OUTPUT ACTUALLY ALTERNATING VOLTAGE??? THANK YOU
  8. Guest Pavel
    #8 Guest Pavel Guests 24 December 2018 15:57
    4
    At the output there is a high-frequency voltage, there is an arc, but neither the LED nor the housekeeper lights the lamp
  9. Karbofos
    #9 Karbofos Guests 24 May 2019 04:11
    2
    Even if we have a battery, there is little we can squeeze out of the circuit. Let's say we have 2700 mAh, within an hour we will get a current of 2.5A (rounded for margin). This is a power of 3.75 watts. The efficiency of the converter in the_best_case_is 50 percent, then the output power 1.8 W. What can be done with this is a big question...
    And yes - I did the conversion on a ready-made transformer using a 2-cycle circuit and with a 12V power supply. He was only able to pull out a neon lamp “candle in the wind” with a voltage of 90V (instead of 220) and an efficiency of less than 40%.
    There is a discrepancy between the parameters of the “accidentally turned up” transformer and the requirements of the circuit, because in a similar push-pull circuit, but with the appropriate transformer, 15 W were squeezed out with an efficiency of about 80% (the load is the same savings).
    1. Edward
      #10 Edward Guests 16 January 2020 14:35
      1
      I agree with you, the law of conservation of energy has not been canceled, it is unrealistic to get more power from a 1.5 volt battery
    2. Edward
      #11 Edward Guests 16 January 2020 14:44
      3
      I assembled many circuits using a single-cycle blocking generator circuit, and I managed to squeeze out a decent amount, but with a normal power source with a decent current. Specifically, I powered the LB40 fluorescent lamp from a 12 Volt 18 A/h battery, generator blocking circuit: transistor 13005, resistor 2.2 kOhm .ferrite transformer Ш7*7, primary winding 60 turns of wire 0.5 mm2 with a tap from the middle. secondary winding 300 turns 0.25 mm2, Everything worked perfectly in the field from a car battery
  10. Andrew
    #12 Andrew Guests December 26, 2019 04:06
    1
    If the transformer is 6V->220V, then why, when powered from 1.5 V, will it turn out to be 220V and not 55?