User:Kmashaye5220/enes100/myWork3

Write problem/project Goal
The main purpose is to make LAB power supplies like other power supply projects.

The specific goals of this project are:


 * 1. Figuring out how this power supply works


 * 2. Converting its outputs in order to become usable in LAB as a power supply

My First Task
This stuff is the most complicated power supply that I've ever worked. I expect it to produce lots of current because of its size. Its size indicates that it had taken apart from a big machine, and it has a big and complicated circuit. As I observed, its outputs have computer-like sockets. I should take apart it and try to recognize wires and their powers, then connect them to binding posts in order to get power from them easily.

Summary of actual work over first weekend
I opened up the power supplies lid. I is made up of two electrical boards: power supply and a complicated board containing lots of ICs. I tested the voltage of its switch. I realized the switch works properly. I followed wires from the power supply board to the other board. I cut and striped them. Then, I measured their voltages; I tested any combinations of two wires. I got no power. Again, I tested the voltage of the switch. I figured out it does not have power, neither works. I guess the complicated board give orders to the power supply board, so because I've cut the wires, even the switch does not work. After that, I started tracing the input power on the power supply board. I traced it until the half way between input wire and outputs, but it became so complicated. I gave up. Next, I made a tutorial for creating a test protocol for ATX power supplies. Here is its link: How to make a test protocol for ATX power supplies

Week1 Narrative
I opened up the lid, this big guy is made up of two parts, power supply and another board with lots of ICs; it looks like main board of a computer.

After that, I tested the switch again. I realized that the switch does not work anymore. I guess that the main board gives orders to the power supply board to make power. Now because the connection between the two boards does not exist, the power supply board also does not work. Then, I remove the switch and shorted the input power to the board and started tracing the power. I followed the power until the half way between input and outputs. I passed a couple of capacitors and get to ICs which I lost the trace; therefore, I finally gave up.

I got to create a tutorial for making a test protocol for ATX power supplies. Here is the tutorial:

How to make a test protocol for ATX power supplies

My Second Task
I have to do some research to determine that if there is a way to fix it again and get power from the power supply board.

Summary of actual work over second weekend
After trying many things to get power from the power supply, it was confirmed that the power supply board must be connected to the electrical board to make power. Therefore, I, with a little difficulties, figured out which power supply's wires had been connected to which slots on the electrical board before I cut them off. And I put them back. I measured their voltages; their maximum voltage is 1.6 volt although under the slots it's written that it produces 24 volts. So, I guess the electrical or the power supply board had been damaged which causes this shortage of voltage. I also found out that the electrical board has several outputs, so I measured their voltage and I got 1.6, 0.6, and 0.3 volts.

Week2 Narrative
First, I tried to figure out in what order the wires from power supply board were connected to this slot.

My Third task
I am going to drill 3 holes and put binding posts into them in order to get power from the system easily.

Summary of actual work over third weekend
How is what you did different than what you planned?

Week3 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Fourth task
''Record what you are planning on doing for the team during the final weekend of project work. ''

Summary of actual work over fourth weekend
How is what you did different than what you planned?

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).