dew formed

Looking at my camera during these hot days made me think: I was recording planetary images at 27°C ambient temperature, and the camera sensor indicated 35 degrees. A bit too hot for my taste. I put a cooling fan on and a bigger one near the camera, a few degrees went down. So I deployed the cavalry: a TEC1-12706 peltier element and a radiator to cool the camera down a bit. It may or may not have helped the image quality, given that the seeing is a much more impacting factor, and the seeing usually sucks, but the camera sensor went down 25°C. And dew formed (I hate these hot and humid days). The peltier’s nominal voltage is at around 12V, however, I figured that 12V is just too much to handle, so I dialed the voltage down to only 3.5V using an oversized (12A, to err on the safe side) buck converter and a 12V 3A mains power source. The camera’s body is aluminium, its back has four conveniently positioned M4 holes: an old computer’s radiator, some thermal grease, plus pliers and a RPi fan was all needed.

Jupiter at ten degrees lower than usual

Jupiter at ten degrees lower than usual

Saturn at ten degrees lower than usual

Saturn at ten degrees lower than usual

The peltier used

The peltier used

the power source: a universal 12V 3A direct current and a buck module in a nice, transparent box. Everything is oversized to err on the safe side

the power source: a universal 12V 3A direct current and a buck module in a nice, transparent box. Everything is oversized to err on the safe side

I’m still Hungarian: big, peltier, blue and tube

I’m still Hungarian: big, peltier, blue and tube

3.54 V, says the indicator, I set it far below 12V

3.54 V, says the indicator, I set it far below 12V

still, dew formed

still, dew formed

the added weight is negligable

the added weight is negligable

the voltage indicator is more for a sanity check

the voltage indicator is more for a sanity check

dew

dew

dew, now the connectors rubber caps start to make sense

dew, now the connectors rubber caps start to make sense

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