MMDVM Jumbospot Battery Case

thingiverse

This is an 18650 battery case designed for the popular Jumbo-Spot MMDVM hat and Pi-0-W computer board. It lets you take your hotspot wherever you go, or just use it at home and unplug when needed without rebooting the system. It's built around the adjustable li-ion boost power supply board and other easy-to-source parts. A note on the parts: I've found that charger board dimensions and push button switch sizes vary between orders. You may need to sand the edges of the board for a proper fit. The switch might be tight, but I can upload a modified file if you ask. Parts List: - Li-ion 18650 3.7V 4.2V Battery Charger Board DC-DC Step Up Boost Module (http://www.ebay.com/itm/303216487352) - 3.7V Li-ion Battery Power Level Indicator Module For Led Voltage Display Meter (http://www.ebay.com/itm/173654256564) - Belt Clip For BAOFENG Radios BF-666S BF-777S BF-888S (http://www.ebay.com/itm/271911858839) - 4 x Metric M2.5X18mm Stainless Steel Allen Hex Socket Cap Head Fastener Screws - 4 x Metric M2.5 Stainless Steel Allen Hex Bolt - 6 x Steel Thread Rolling Screw for Plastic, Black Zinc Plated, Pan Head, Phillips Drive, #2-28 Thread Size, 1/2" Length (Amazon ASIN#B00GDXUD2S) - uxcell AA Battery Positive Negative Conversion Spring Contact Plate (Amazon ASIN# B00O9XVE2M) - Mini Push Button Latching On Off Switches (http://www.ebay.com/itm/183366037839) - JST connector set (Amazon ASIN#B01M5AHF0Z) - Clear PLA 1.75mm Filament - 18650 Battery - Pi-0-W - JumboSpot with integrated UHF ceramic antenna on board. You'll also need hookup wire, soldering skills, and a multimeter to set the output voltage of the dc-dc boost controller. I set mine to 5.2 volts. 05/22/2010 step files now uploaded. 73, KC6NKK