User:Kshew12/ENES-100/project 1: Power

Week1 Narrative
The previous goal for project wa to re-purpose power supply for use in electrical projects which has the ultimate goal of recharging batteries using solar panels.

However, I could not find any documentation of failures or success on Wikiversity.

My main duty for this weekend on the project was to get familiar with the circuit built in power supply and what resistors it contains determined by the color of resistors.

Also, I searched a space to attach the meter reading the voltage on the power supply.

Week2 Narrative
As week 2 progressed, I found that it was difficult for me to work on Power Supply Tester by myself even with the circuit layout from the circuitlab:

(https://www.circuitlab.com/circuit/zp64qr/powersupplytester/) <-- I could not upload this picture on my wikiversity because of "right" issues. Apparently wiki doesn't recognize the page as Public.

Anyways, as I requested assistance from my team member, Lukas was more than interested in helping me with the project that he wanted to trade project with me, which I agreed to since he was more inclined in wiring stuff than myself. As I worked on the mini refrigerator. I noticed that three wires were attached to the thermostat. Tracing back those wires from behind, I realized that the green wire is used as grounding and from then on I assumed that black wire is negative and the white wire is positive since black usually represents negative cord while the red one represents positive in Physics. However, on thermostat, the 3 possible choices of placing wire were not labeled so I placed white one on top and black & green on the bottom as represented in the picture on the bottom, "The zoom-in view of thermostat..." After plugging the power cord to the outlet, I quickly realized that it was not the correct order because it blew up the fuse. I was a bit scared and frustrated because I hate feeling of electric shot and I was not expecting result

Moving forward, my next going to do is swap the white one with black to see if that works; however, I will be asking other members' advice before I do that because I do not want to blew up fuse again.

Week3 Narrative
As third week progressed, I was searching for the documentation of refrigerator because I could not figure out the ways to approach the problem of it not working. I wanted to see if the people who took out the thermostat in the first place documented their work so I could read their success and failures; however, I could not find that on wikiversity. I do not want to the brake fuse again so I will wait until I know the actual problem. On the other hand, I got to learn information about my teammate's project on the recharge-able battery system and the power supply tester. We will be presenting them on following week.

Week4 Narrative
Simplified Edited version.

What I have done this week: - Found the past documentation of the mini freeze by searching "Haier refrigeator bc-50p correc thermostat correction" on google. Brittany's old documentation: https://en.wikiversity.org/wiki/User:BrittanyJ/ENES-100/Project_3/Design

- I corrected my wiring position based on Brittany's old documentation.

- Left it on for about day to see if there was any temperature difference.

- Watched a video about mini freezer, http://www.youtube.com/watch?v=sylSVZKGB9I, which hinted me that there might be a problem with the overload relay.

- Looked for reset button on starter relay and overload relay.

- Traced the sealed system, compressor and evaporator and took pictures of them.

Just had realization that this is exact same process as the air conditioner and heat pumper!