DSO138mini case with 18650 lithium cell holder

thingiverse

Part 1 of a 3D printable DSO138 Mini case with single lithium 18650 cell holder is now available. Part 2 is still pending, but contributors are free to grab the files and create the top with buttons. I'm not too fussed about a top; my DSO180 Mini has a usable version on my bench already :). My DSO180 Mini also features a lithium charger module option that allows it to run from or charge the lithium cell via USB power. The battery is handy when working away from a USB source. The cell contacts are made from brass shims cut to fit the slots at each end, bent over towards the cell contacts in typical fashion. Solder them off of the case so you don't melt the slots. The Case Template SKP file shows the buttons and switch positions on Sketchup Make; use it to transpose to a case top. The STL shows them as holes... Addendum: I bought the JYETech JYE118 Li-Ion charge module for a few dollars from Banggood.com, and fitted it where the header is for it (this charges the 18650 cell). I did one more thing of note though; I lifted one pin of Zener diode D2 on the control board, allowing charging of the 18650 without running the DSO138 via USB power at the same time. You can turn it on via the switch and run with USB in, but I prefer not to have the screen running if I'm just charging. This seems more normal that way. If you print the case in clear ABS, the charge LED, power LED, and trigger LED are all quite visible glowing through the sides :)