1. Dan Aronin

    Darlington transistor POWER AMPLIFYING

    Hi all, I just couldn't find the answer on web so I had to ask you guys. Based on my understanding, input power is ideally equal to the output power of a circuit unless it is dissipated to heat. So I was looking at the ULN2003 Darlington controlling a 28byj-48 stepper motor using an Arduino...
  2. A

    How can a AC source be regulated to specific DC?

    Currently I am trying to power an Arduino project with a mechanical battery. I am using a stepper motor (NEMA23) as generator for it only needs low RPM to reach full potential (Around 600 RPM). Output of the stepper was determined at 1.8A AC @ 33V. This should be enough power for all the...
  3. Theo_KVA

    Electrical switch for a non-chemical battery - How to do it?

    Hi everyone, I’m seeking guidance. I have a tricky situation which I don’t really know how to get out of. I want to design a system which would consume the least amount of power possible. The idea is to have an ESP8266 do a simple task every minute (updating a e-paper display) and sleep the...
  4. Theo_KVA

    Generator at low RPM for a non-chemical battery - What to look for?

    Hello! I’m in the process of trying to build a non-chemical battery. I sick a bit of guidance as I tend to go down an engineer rabit hole, because of the complexity that the project is aiming. My goal is to make some kind of object that could store enough energy to charge a smartphone’s...
  5. S

    Vixen DD-2 telescope motor controller not light on LED and not working

    I have a vixen DD-2 telescope controller, which is not working. In my cases the LED on the controller doesn't lighting up. The controller remote is rated 12V/ 0.96A. I have confirmed the capacities of all the capacitors and the voltage at points A to E: A : 12.1V B : 12.1V C : 0.5V D: 0.9V...
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