Hydroponic dill

New Bed Heating Element

This is the heating element I ordered off eBay. After examination I found out that it is not any different from my previous attempt to heat the bed. It is comprised from nichrome wire wound around a cardboard, I can not identify what it is made of, sandwiched between an aluminum heatsink and an aluminum plate. After screwing it on the bed, it achieved the required temperature after about 5 minutes. The only downside I see for the moment is that the heatsink is very tall and there some leakage which is about 40V. Touching it while connected on the grid, it didn't kill me so I suppose it is "safe".
After leaving it on for 2 hours, no smoke appeared, so it seems to be working good. Soon a temperature sensor will be added.

3D Printer Axis Test

The first video shows the x axis test while the second shows all axis test.

There is also a picture of the electronics I used.

1s Lipo Charger

These are the PCBs I ordered from OSH Park. Falsely I ordered a 4 place DIP switch when I needed a 3 place. The charger seams to work well even though I didn't have the opportunity to test it long enough since it charges the batteries really fast. The DIP switch selects between 0.5A-2A charging current with a 0.5A step.

The goal is to implement a modular and configurable charger which can adapt to the given battery configuration. 

The charger needs a 2A 5V power supply, which fairly common.

New hot end nozzle

This is my new failed 3d printer hot end nozzle. The main problem is that the heat induction is not good enough so the nichrome wire inside overheats and burns. Also I was so impatient that I used steel washers that I had in hand and didn't wait for aluminum ones. Anyhow I am going to test the nozzle after I replace the nichrome wire.