00:03This video demonstrates how to make a 12-volt DC to 220-volt inverter
00:08alternating current, in order to possess or suggest this work to have energy
00:12electrical, given the crisis that countries like Ecuador or Venezuela are going through, which exists
00:17power outages, due to political causes and corruption.
00:22For this we have a 12-volt DC car battery; this circuit can be useful.
00:27to power a small light bulb, radio, cell phone charger, tablet, or other devices that require little power
00:32power, recommended for less than 100 watts.
00:35The circuit basically consists of an oscillator that generates a square wave signal
00:40For the 555 timer, we start with a 12-volt DC power supply.
00:47In our case, the car battery, represented as such, has a resistance of 10 kilo ohms.
00:56a 1000 microfarad electrolytic capacitor, another 9.5 kiloohm resistor, a capacitor
01:09of 100 nanofarads and 10 nanofarads, the 555, we add another resistor of 100 ohms,
01:31We also added a yellow LED as a pulse indicator and a transistor.
01:38TIP 41 AG, another transistor TIP 42 AG, another transistor TIP 42 AG, a capacitor of
02:002200 microfarads, and finally a 220 volt AC center-tapped transformer, and we carried out
02:14the connections.
02:32The circuit basically consists of an oscillator that generates a square wave signal
02:37originating from the transistors and their working configuration.
02:41When electrical energy is applied, because transistors are never identical,
02:46One of them will start driving and the other will be blocked, but since these feed back into each other
02:50from the collector to the base, after a short time the state of the
02:54transistors.
03:00This square wave signal is fed into the primary of the transformer and then amplified
03:05at 220 volts.
03:09Now for the oscilloscope connections we have, the probe is connected to ground, the
03:21Channel 1 is connected to the transformer input, channel 2 is connected to the signal output
03:30of 555 timer oscillator.
03:39To see the input and output voltages of the transformer, we have the multimeters available.
04:02Now, for the transformer configuration, we will use a simple rule of three, in the
04:06which we have if at the transformer input, as measured by the multimeters, it is
04:11of 5.5 volts and which corresponds to one turn, this so that it is multiplied by 1, and that
04:16does not affect the operation to be performed, since the voltage delivered by the circuit is
04:21of 5.5, which could be any other, failing that it is multiplied by 1, and in the entry
04:26And to get 220 volts AC, how many turns of the secondary winding will we need?
04:31We develop and solve this and it gives us 40 turns of the secondary coil, we replace this result
04:39The values in the transformer configuration, in the primary it will be 1, and the secondary will be
04:4440, in the simulation we already have the input values of the transformer, as well as
04:58The output, we observe, is 5.5 volts, which transforms it to 220 volts.
05:14We also see that the oscilloscope signals at the output of the 555, like that of the transformer
05:19In square wave, well if the video was useful to you don't forget to subscribe.
05:50Thank you!
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