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Mini Adjustable Voltage Regulator
Razor Blade Cutter
You're on the right track. This is similar to the one I have listed above, except it measures 2.5v - 30v, which is sufficient for most applications like this little power supply. The ones I have actually measure up to 100v DC, but you will be perfectly OK with this one below.And yes, you could use a mini ATX power source as the input to the voltage regulator, in place of the two 9v batteries in series like I show. You will just be limited to the max voltage the ATX power source output is. Most are 5v and 12v. Sometimes have 24v output. I would recommend the 12v or 24v, but you can use any voltage up to the max input voltage of the regulator IC that you choose. If you are going to run a lot of current through it, I would recommend using a heatsink on the regulator. You could even screw it to the ATX case. The advantage of this circuit is the fine-tuning you get with a 10-turn potentiometer. Attach pics whenever you build yours.http://www.dx.com/p/mini-led-dc-2-5-30v-volt-volta...
The only link I found for this Volt Meter is this one :http://www.dx.com/es/p/v27d-t1-0-56-3-digital-led-voltmeter-black-dc-3-2-30v-229568#.V7tBO_krKUk
Thankyou ! I will try to find a link. here in Brazil there are no much info about this type of component, they sell it and "thankyou for your business !"... By the way, would be perfect for me if I can use this with a PC Mini ATX power source. Do you think is safe ? Thankyou for your response !!!
No worries. It's good to get questions like this because sometimes other people have the same question. Do you have a link to this volt meter? I can tell more by the description and specs.The one I posted in the link above requires 4.5v to 28v DC input, then it can measure 0v to 99v DC.Power specifications:4.5V to 28V DC power0V to 99.9V DC measurement
Well I think its exactly the same :)
Hi ! Sorry for bring this up again, I hope this will not be a problem....I bought everythng to make this Instructable, I really need something like this for my lil lab... btw, i´m a begginer, and I only found this Mini Digital Volt Meter I atached the images. The seller told its 3.5 / 100 Volts, and the white cable can work with voltages as small as 1.5 volts. Do you think I can use it ? ( was very cheap anyway ) Thanks in advance !
Hand Held Non-Powered Engraver
http://www.reuk.co.uk/LM317-Voltage-Calculator.htmThere are many calculators out there to help determine the fixed values (if you wanted to used fixed rather than potentiometer), however, this link has a nice table that shows various ranges. I have not had any issues with using the 20K and 1000ohm as noted. If you were to use a 10k, I think you would be OK with 500ohm. Try out the calculator and figure out what voltage range you will be working with, that might help determine what values make most sense. Also, it's a simple formula, try doing a few manual calculations just for fun.
Oh sorry. One more thing. Im guessing that if you use a 1000 ohm resistor with the 20k pot, If i use a 10k pot i would use a 500 ohm resistor. Correct? Or am i doing this wrong?
Thanks! Helps alot! Theres just so many different alterations and options its hard to tell what to get! Love the instructable too, its exactly what i was looking for!
Can you put a link to the potentiometer you used please? Im having trouble finding the right one
Repair mouse with double click problem
I actually ended up swapping the switch with another one from my other Intellimouse Optical that wasn't working for a different reason.
Here are two very close up pictures I had from my Intellimouse Optical USB. They are very similar to the ones all of you have shown. Hope this helps someone to see it close up.
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