This is a challenge issued by friends and family. The goal here is to make a robot that can bring beverages from another area to wherever the people are , allow the person to get their drink , then leave. It does not need to be fully autonomous , even remote control is acceptable. It does not need to grab them from the fridge, preloaded beverages are acceptable. This is Ez Robot though, I believe we could do better than that! Well anyways to start the project off I am using a roomba base. I picked up a stainless steel trash can last night as a outside casing. I will show you the rest as we go
By jstarne1
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Using some basic math here you can see that the new Peltier is 3 to 5 times more powerful. Even with this I'm concerned it's not enough for what I want. I will figure it out though
I know you will Josh, you always do. I'll ship your laptop soon, had a family emergency and just got back. But I found this sweet base for my next robot. The soda can is for scale, it is 3 feet long and 17 inches wide.
it uses a 12 volt battery like the ones I used for Mini-BWow that's going to be a really big base , hopefully a outside robot.
Actually it is going to be my big indoor bot/butler and surveillance bot. I found a little grill at Goodwill that is going on the top. It will house my paintball gun. This thing already uses a 12V 8ah battery. Excited to start working on it, even though I have several others that aren't finished yet. I think I'm taking a page from the Josh Starnes Bot Building Book...
Ok so I spend part of the day getting basic materials like 1/8" aluminum bar stock that's is just about the same width as the pelteirs by about 38mm wide. I removed the original Peltier and see it is a 12706 , the last number indicates the aperage at full on. Notice the previous tests showed it drew 2.8 amps at the most. That tells me most likely something was wrong with the Peltier or the thermosister governing it.
Ok so both 12710 peltiers are hooked up with ample heatsink thermal paste. I will run it for a while and see if the heatsink handles the heat dissipation without getting much warmer than room temp. This is what you want afterwall. You want the peltieri to move as much power asppossible without warming the heatsink up. The 35 to 40 degree difference is dependent on this. If the heatsink was 100 degrees the cold side is 65 degrees which would not work at all! I plan to test this and see how the performance is and go from there. These tests will determine if I move to a larger cooling setup for chilling or if I'm sitting pretty.
8 pm Ok so first 30 min weren't so good . I checked it and thi inside chiller was really hot and the outside which should be hot was barely warm. So that sucks. Apparently the hot side was different so o reversed voltage and promptly smoked my cooling fan. Ugh ! So I have it switched bit I bet it will take just as long to move the heat to the correct side. I will offer updates every fee minutes.