7" Touchscreen with Keyboard Rugged Raspberry Pi Tablet
Description
This is a mod of my [Rasptop 2.0 Laptop](https://www.thingiverse.com/thing:2859679) to create a pretty rugged mildly water resistant if built correctly tablet computer. It uses a lot of the same parts as the Rasptop 2.0 including the 7.2 volt 2s battery system. It features Raspberry Pi 3+ compatibility including the Pi4. The frame is mostly 5mm thick walls for strength and durability. I printed mine in PLA which is plenty strong and slightly flexible which helps but of course ABS would be the most hard core for this. #BOM: - Your favorite Raspberry Pi form factor computer. - [2S charger 9-15v input](https://www.ebay.com/itm/Charging-Charger-Module-1S-3-7V-2S-7-4V-Lithium-Li-ion-18650-Battery-Cell-8-4V/183533323601) - [2S Balance and Protection Board](https://www.ebay.com/itm/2S-8A-Li-ion-Lithium-LiPo-Battery-18650-Charger-Protection-Board-Cell-7-4V-8-4V/323268969256) - [DC to DC Buck Converter 5amps](https://www.ebay.com/itm/5A-Mini-DC-DC-Buck-Step-Down-Converter-Voltage-Regulator-3-3V-5V-6V-9V-12V-24V/263198737343) - [2S Charger Indicator](https://www.amazon.com/gp/product/B07KW1NC37) - [9 volt 5amp Power Supply, using 9v instead of 12v greatly reduces heat in the charger circuit](https://www.amazon.com/gp/product/B074TCY8MM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) - [Keyboard](https://www.amazon.com/gp/product/B0784B8QZ1/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) - [DC Jack with cover](https://www.amazon.com/Maxmoral-Connector-Waterproof-Threaded-Mounting/dp/B07S5ZLFDG/ref=sr_1_16?dchild=1&keywords=dc+jack&qid=1585365321&sr=8-16) - [16MM Waterproof Button](https://www.amazon.com/Coolais-Switches-Latching-Waterproof-Self-Locking/dp/B07J2DQFW6/ref=sr_1_8?dchild=1&keywords=waterproof+16mm+button&qid=1585365298&sr=8-8) - [7" Capacitive Touch Screen @ 1024x600px](https://www.amazon.com/Longruner-Capacitive-Display-800x480-Raspberry/dp/B071X8H5FB/ref=sr_1_9?dchild=1&keywords=7%22+hdmi&qid=1585365572&sr=8-9) - [Waterproof USB 2.0](https://www.amazon.com/Anmbest-Electrical-Waterproof-Connector-Industrial/dp/B07RPW5XGB/ref=sr_1_17?dchild=1&keywords=waterproof+usb&qid=1585365286&sr=8-17) There is the same in USB 3 for RPI4 use. - [USB Power Bank for the batteries x 2](https://www.amazon.com/gp/product/B078TFHXVY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) - [Sealing Tape for seams and around screen](https://www.amazon.com/gp/product/B0817K1JQT/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1) - [Short USB Type A Cable](https://www.amazon.com/Monoprice-1-5ft-24AWG-Cable-Plated/dp/B009GUXG92/ref=sr_1_49?dchild=1&keywords=1+foot+usb+3+type+a&qid=1585366148&sr=8-49) #Wiring:  Starting with the batteries I wired them each with a length of 20ga silicone wire then on the balance board you connect positive from one cell and negative from the other to the B+ and B+ tabs on the balance board. The leftover positive and negative wire both go to the BM pad together making a series connection. The P+ from the balance board then go to the switch. The P- goes right to the converter board input. At the power board input also wire in the battery meter. The P+ and P-are also where the positive and negative from the charger board attach so it can charge with the switch off. I used 24GA wire from the charger to the cells. I also used 24gs from the DC barrel jack to the charger board. #Be sure to set the voltage before connecting anything to the DC to DC converter! #No more than 5.2 volts. Set to 5.1 volts! When assembling use sealing tape on the seams between the case halve and around the screen. #it is currently a work in progress as I have not yet assembled mine! I made keyboard clips, these glue in with superglue to hold the keyboard in place. #Thank you!
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