1. Thermo-Cooler Controller Kiefer, Mary, Molly, Sam

2. Debrief from Telecom (Highlights) What we got clarified: ▫Time Efficiency > Power Efficiency ▫+/-.1K = goal ▫Purchase own TEC ▫Don’t worry about cOpper plate/radiator Background Info ▫Previous/Common Solution = Linear Controller ▫Marlow Literature ▫DC  DC converters have ~85% efficiency

3. Debrief from Telecom (Highlights) What’s important? ▫Minimize electrical noise ▫Longevity of TEC ▫Time efficiency ▫Power efficiency What’s added bonus? ▫Electrical components that can operate in vacuum ▫Copper plate/radiator operation

4. Temporary TEC and stuff 3-stage TEC-- $45.50 + $2.60 potting/sealing ▫Potting/sealing  water resistance ▫Goes down to 217K (not 200K) Minimum Order -- $85

5. Temporary TEC and stuff (cont.) Thermistors only go to 233K (not low enough) K-type thermocouple temperature meter--$45 ▫Problems:  Reads temp down to 223K (TEC goes down to 217K)  +/- 3°C error on temp readings under 273K Thermocouple wire--$24.70 ▫Do we need this (vacuum testing)? Thermal paste--$14.50 ▫To attach temp measure to TEC cold side Total- $132.30

6. Our system 12 V Signal ‘Actual’ SW Active(?) Filter TEC Can we do this with a passive RC filter? Outputs the signal we want Smooths and reduces the signal down to 7V Cool detector to 200K (+/-.1K) 12V DC

7. Current Assignments Research the signals we want to input ▫Pulse frequency ▫Differences between pulses Look into RC filter ▫Can we reduce/smooth 12V  7V with passive filter? What does it require? Expand model of TEC PERT chart