crazybuoy
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Posts posted by crazybuoy
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There is a small circuit schematic attached where I am using voltage regulator 7812. I input 24VDC and 12VDC comes out from OUT pin. I want to make switch off & on NPN transistor with 12VDC buy using PNP transistor before NPN. And I will use PC printer port to provide the 1 & 0 pulse of 5VDC then how I should wire the circuit I want to just get the idea. Or is there any other way to do the same?
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Thanks guys, I have try to install 1K variable resistor and have adjust it to many values. But still the motor does not move any step. Is there any way to troubleshoot the circuit?
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Thanks, how about the value of resistor?
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How about to use big resistor to drop the 220v AC to 24v AC then use bridge rectifier to convert it to DC?
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I want transformerless power supply with 24V 2 Amp and I think any existing cell phone battery adopter can do it for me. I have an DC adopter (5V 250 mA) and want some changes in the circuit to get my desired volt & amp. You can review the circuit of any of your adopter, as most peoples has such a adopters.
You may also suggest any other circuit that can provides me transformerless power supply with DC 24V 2 Amp.
unexpexted performance of unipolar stepper driver.........
in Electronic Projects Design/Ideas
Posted
I am using the attached circuit. By providing 0 to Enable point, it starts moving the motor in both directions, some steps to one and some to other direction without any more input and stops by providing 1 to enable. I want to move one by one step. Please guide.