Telescope Power Distribution

These three projects each resulted in a usable telescope power box. They are different in design, except that they are in the same model of enclosure. One is completely passive, while the others are computerized and automated. The third one reports on current and amp-hours used.

The second is my favorite. It controls the power perfectly and costs quite a bit less than the third version. I measured the current one time, so I didn't get much out of the extra cost. It would have been easier to just put a meter on the input and look at it. I'm back to using version 2 again, because I like the port layout better.

The Telescope Power Distribution Box version 1 is a simple box with some filtration and 6 output jacks, which are on all the time. You plug it in and you get power. It has a 12v to 5V@4A voltage converter to power a Raspberry Pi 4B.

The Telescope Power Distribution Box version 2 has a Seeeduino XIAO and 8 high-side power switches. The 6 individual switched channels may be set to on, off, or automatic on. It also has two heater outputs that can automatically maintain the temperature at a set level above the dew point. A 5V@4A output powers a Raspberry Pi 4B.

The 3rd version of the Power Distribution Box has the same features of version 2 plus a Teensy 3.1 and reads the current for each switched channel and the two heater outputs. The current for each channel and heater is monitored and reported back to the Raspberry Pi, along with the amp-hours, watts, etc. It lives in the box from version 1.