I needed to revise the power board I’m using for driving the pump laser diodes. The current power board is still a little noisy — it doesn’t work at all if you don’t have an EMI filter on the data bus, and it will stop working if you turn the current up too high. Also, since I designed it I changed how the bus interface connector is going to work. Time for another revision!
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The final TEC board is done and appears to work great.
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My second prototype TEC controller was a bit of a failure but the same circuit on a real board fares much better.
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I redesigned my TEC controller to use the LTC1923 chip so I can use higher powers on the outputs.
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The next board to design is a TEC controller board to control temperatures of the laser.
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