Step 26: Power Supply Part 2This tutorial is dated, if you are considering a CNC for your personal use, we would highly recommend
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This video will conclude the power supply circuit build. We left off at the capacitors and now we need to add the next capacitor. Two in all, and the capacitors will be connected in parallel. This will give me a relatively nice direct current (DC) voltage, which is our goal.
In the last video, I actually reversed the white and the green wires from the bridge rectifier to the capacitor. I connected the negative lead on the bridge rectifier to the positive lead to the capacitor. It's times like these you do not want to plug things in prematurely! I caught the error and de-soldered the leads and connected them correctly.
You will see that I don't use electrical tape sparingly. I use it to make sure all bare leads are completely covered very well. I also use it to make the job of connecting and soldering a little more painless. Electrical tape, just like duct tape, has many latent uses, such as taping the two capacitors together so they don't move around too much.
A fuse and a resistor are the next components to solder. I gave you the details on these in the last post, so I will spare you.
I test the circuit at the end, sitting on one cheek of my backside while tensing. I plug in the behemoth, tensing my cheeks again with my face turned in the other direction. I then proceed to flip the switch. No explosion with the exception of my computer screen warping for a split second. I also noticed a purple tinge of color to the same side of the screen requiring the need to degauss. The energy field of the transformer must have disturbed the CRT's ions. That's ok, because there was no explosion, no fizzle, no snap... nothing. Still suspecting something, I went ahead and picked up the end leads and tested them. I measured a successful 34 volts output. A huge relief!
A few individuals are interested in a bill of parts and costs. I will concentrate on manifesting the parts tonight and tomorrow for my next post. You can expect a list of parts with costs associated. The list will grow to exhibit alternatives in parts and electronics for a wide variety of solutions.