Building of the electrical part
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iTender's brain : There is still a little work ... |
The ventilated radiator : I will make a frame to fix the radiator |
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The closed iTender's brain |
View of the whole |
Some screenshots of the first tests and settings |
Some screenshots of the first tests and settings |
This week I'm building the final version of iTender's brain. For this I fixed most of the component on a wooden board which will be fixed on the bottom of the piece of cabinet. The editing is not completely finished but I still well advanced. I'm still waiting for the reception of some pieces :
- additional peltier modules for faster cooling
- a circulator for the "cold circuit", this will help to reduce noise pollution
- A Zenner diode to be able to control the fan in PWM. This will help lower the noise of it. The zener diode avoids breaking the output of the rapsberry which drives the fan in case of power return.
This first assembly allows me even to perform the first test "life size" of the cold circuit: it looks pretty good. I still have two things to improve: noise and efficiency of the steering TEC. To drive them peltier each TEC is connected to a relay and I have a cascade operation depending on the cold demand. The only problem is that when a TEC is shut down it creates a thermal bridge between the cold circuit and the hot circuit. To optimize this I will see if I can drive the TEC in PWM with a 12V motor driver to have a much finer control and reduce power consumption.
I will continue the building on the construction of the prototype of the cabinet.
