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So I was going to take a new video for someone on here who was curious how the potentiometer worked in the system, but I had a minor electrical meltdown.... I had my scope hooked up and was watching the waveform and the probe arced from one of the outputs to ground, and it literally blew the...

I'll try to get a video with the potentiometer up this evening. I think any fan would work, but my goal is to keep the moving parts inside the flask. I think an aluminum heat sink sized properly should pull enough heat off of them. I like your ideas for using an LCD, I need to find one of...

I'm going to put heat sinks on the bottom of the coils so they conduct heat away from the platform (where the flask sits), not sure how good this will work. The heat from the coils isn't too bad. Since I have a temp sensor available I've thought about using that to create a control loop for...

I am using two H-Bridges, each H-Bridge drives 2 Pairs of coils. The data sheet I have says each driver can handle 1A, which I am under (total current for each IC is ~1.2A). I might migrate this project to a 24Vdc supply, instead of 12Vdc to get the current down (I have access to the same coil...

If I were you I would start out with the basics, just so you understand the relationships between the arduino hardware and the software you will write. Get yourself an Arduino, a breadboard, some LED's, and a few switches (sometimes you can find all of these items in a prepackaged kit) and...

It is manufactured by a company called Hoffman. You should be able to find them on Digi-Key's website. I found mine at a local electronics shop. Good idea! I wanted to make sure my software was optimized before I dug into the hardware. I can breadboard this pretty easily, it makes enough...

Great questions! I am actually powering all coils at the same time. I discovered through some testing that if I repel the stir-bar from one location while attracting it at the next it improves speed and response. Since I have (4) magnets each coil will be energized at any time. Although, I...

Bloomington! Glad to see another person from MN on here so quickly.

I'll take this as a compiment! If you're ever interested in electronics a good place to start would be Radio Shack. They have some good books available that start with the basics, and for probably $50/$60 you can buy an Arduino (cheap and easily programmable controller), some LED's, a...

Check out this link to my YouTube video: It is still in the prototype phase, but it works! I am using a custom PCB that I designed and purchased through expressPCB. The board is using an Arduino Pro Mini 16MHz microcontroller. The H-Bridges are SN754410NE units from TI. I have suppressor...

Hi All! I've been brewing for a couple years, and everytime I type a question into Google it directs me to this forum. I finally decided it was time to join! I'm excited to be a part of this forum, and hopefully I can contribute to help make up for all of the great info I've taken out...