DSO 150 Shell - Battery shell v2

thingiverse

This is a recreation from scratch of the first DSO Shell + battery + USB charging. The Freecad source file is included if you want to modify it. The design uses a TP4056 to charge the battery and a boost converter to bring it up to around 8.5 volts. You may need to filter the DC/DC output if you notice a lot of noise - this was not a significant issue in my case. The part list is identical to the first version: * Boost: https://www.ebay.com/itm/5PCS-MT3608-2A-DC-DC-Step-Up-Power-Apply-Module-Booster-Power-Module-for-Arduino-/201206848274?hash=item2ed8dcdb12 * TP4056 including protection circuit: https://www.ebay.com/itm/5PCS-5V-Micro-USB-1A-18650-Lithium-Battery-Charging-Board-Charger-Module-/400665524431?hash=item5d4986b8cf * Switch: https://fr.gearbest.com/diy-parts-components/pp_237508.html?wid=21 Some tips: - You will need to use supports and they can be a pain to remove, but it is doable. - You'll need to clip a bit of the original power switch if you installed it. - If you use large batteries like in the pictures, space will be very tight. But you can use smaller batteries such as those for Nokia 3110 phones. There isn't enough room for 18650 batteries, but smaller ones can fit. Be careful: some boost converters on eBay have the wrong potentiometer value. It should be 100k (104) and it is actually 1k (102).