- #1
tefavolc
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how to make auto-switching device using transistor??
Make Auto-Switching Device Using Transistor
- Thread starter tefavolc
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In summary, the conversation is about how to make an auto-switching device using transistors to convert DC voltage into AC. The circuit involves using a transistor to control the current and switching it fully on and off to produce the desired output. The speaker also suggests using an opto-coupler or pulse transformer to drive the new transistor. The conversation also mentions the importance of proper design and precautions when working with such devices.
- #2
poor mystic
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Please describe what you want to switch
- #3
- #4
poor mystic
- 128
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I don't know what you mean by a 'simpler key'.
Do you want to replace the switch with a transistor?
Please tell us what the circuit is for, and where those outputs go.
Do you want to replace the switch with a transistor?
Please tell us what the circuit is for, and where those outputs go.
- #5
tefavolc
- 29
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poor mystic said:
ys i want to replace the switch by transistor and i want a way to make the transistor base currents vary from zero into some value so the transistor will act as auto switch and then i can convert the input dc voltage into ac and the transformer work..
- #6
poor mystic
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Tf I have read this correctly, you want to use the circuit as the centre of a DC to AC converter. Is that correct?
- #7
tefavolc
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poor mystic said:
yes ...
- #8
poor mystic
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When you control a current by using a transistor, the transistor gets hor just as a resistor would if it were soaking up the power. So to operate the transistor in a half-on mode makes the transistor get hot and lots of power gets wasted.
Usually, people wanting to produce AC power from this kind of circuit do not use the "half-on" mode of the transistor. They switch the transistor fully on and fully off, and rely on filtering to clean up the resulting mess.
Usually, people wanting to produce AC power from this kind of circuit do not use the "half-on" mode of the transistor. They switch the transistor fully on and fully off, and rely on filtering to clean up the resulting mess.
- #9
poor mystic
- 128
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You can most easily drive the new transistor from an opto-coupler or pulse transformer.
There will be no need to filter the output from the new transistor, in fact you want about as unfiltered an output as you can get. The current from your new transistor is a tickler for the power transistors; it initiates a cycle of current in the high power part of the circuit.
I think it likely that the load will be critical for the operation of this circuit since feedback from the load enters the power driver circuit.
There will be no need to filter the output from the new transistor, in fact you want about as unfiltered an output as you can get. The current from your new transistor is a tickler for the power transistors; it initiates a cycle of current in the high power part of the circuit.
I think it likely that the load will be critical for the operation of this circuit since feedback from the load enters the power driver circuit.
- #10
tefavolc
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thnx for info. do you know simple way to convert the dc into ac without transistors??link me the way if you know
- #11
poor mystic
- 128
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Anything that actually works has to be simple on some level, but the question is too broad for a short answer.
Good men have spent their lives on power supply design; the results of their efforts are not to be summed up in a few words as a 'done deal'.
I suggest that if you are really interested in learning a bit more you'd probably find the study of electronics rewarding.
Depending on what you want to design, electronics design work can be reasonably easy, and it is very satisfying to implement one's ideas in the real world!
Good men have spent their lives on power supply design; the results of their efforts are not to be summed up in a few words as a 'done deal'.
I suggest that if you are really interested in learning a bit more you'd probably find the study of electronics rewarding.
Depending on what you want to design, electronics design work can be reasonably easy, and it is very satisfying to implement one's ideas in the real world!
- #12
tefavolc
- 29
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see that vedio ... that is what iam taking about... how can he convert the dc into ac by using the transistor ... my idea is the transistor he use doesn't reverse the dc current in the transformer it only pass the current in two oppesit direction I1 and I2 as shown on my attach. paper ,and those currents still cannot operate the transformer coz they still dc currents,,, pls if anyone can help ?
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- #13
poor mystic
- 128
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I looked at the video, and although I could not hear the sound and can't comment on all the details, I can see that the heart of this device is the transformer.
A transformer is an inductor, which produces an large output voltage when input current is changed quickly. When switching the transformer on and off, current changes rapidly and a high voltage can appear for a short time.
Please take care with this sort of thing, it is the kind of thing people are often careless with but there is always the chance of causing a heart attack, even in a healthy person.
A transformer is an inductor, which produces an large output voltage when input current is changed quickly. When switching the transformer on and off, current changes rapidly and a high voltage can appear for a short time.
Please take care with this sort of thing, it is the kind of thing people are often careless with but there is always the chance of causing a heart attack, even in a healthy person.
FAQ: Make Auto-Switching Device Using Transistor
How does a transistor work?
A transistor is a semiconductor device that can amplify or switch electronic signals. It consists of three layers of material, typically made of silicon, with different levels of conductivity. By applying a small voltage to one layer, called the base, the transistor can control the flow of electrons through the other two layers, called the emitter and collector. This allows it to act as an electronic switch or amplifier.
What components do I need to make an auto-switching device using a transistor?
In order to make an auto-switching device using a transistor, you will need a transistor, resistors, a power source, and the components you want to control (such as lights or motors). You may also need a breadboard, wires, and a soldering iron depending on your preferred method of prototyping.
How do I design the circuit for an auto-switching device using a transistor?
The circuit design for an auto-switching device using a transistor will depend on the specific components and desired functionality. Generally, the transistor will act as a switch to control the flow of current to the components. You will need to determine the appropriate resistors and voltage levels for your specific components and design the circuit accordingly.
What are the advantages of using a transistor in an auto-switching device?
Transistors offer several advantages in an auto-switching device. They are small, reliable, and can handle high currents and voltages. They also have a fast switching speed, making them ideal for switching applications. Additionally, transistors are relatively inexpensive and widely available, making them a popular choice in electronic circuits.
Can I use a transistor in place of a relay in an auto-switching device?
Yes, a transistor can often be used as a replacement for a relay in an auto-switching device. However, it is important to make sure that the transistor can handle the required current and voltage for the components being controlled. A relay may be a better choice for high power applications, but a transistor can often provide a more compact and efficient solution.