Channel: Devon Crawford

Category: Science & Technology

Tags: dvd drivessoftware developmenthardware programming1865018650 battery cellslaptop batteries testingstepper motorslow level programmingcomputer science studentautomationsalvaging laptop batteriescomputer sciencedevon crawfordbattery capacity testinganalog circuits18650 battery harvestingc programmingbattery testing automationardunio programmingembedded programming

Description: This machine will automate the capacity testing of 18650 cells based on a constant 1 amp current draw. I have a few hundred 18650 cells that were salvaged from laptop batteries. Some may be good, and some may be bad. I want to assemble all of the good batteries into packs for my camera, phone, solar power bank, the list just goes on really. This machine is the first step. Also yes the stack of batteries was a very dumb idea but I tried to use the parts I already had. Obviously a DC(high rpm) motor is not suitable especially since you cant really do precise movements. Watch part 2: youtu.be/Gp6T2UscHwc Next Video: Previous Video: youtu.be/gZuNOqaDnSQ Hardware ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Constant Current Load (inspired by GreatScott): youtube.com/watch?v=8uBcywBUTkw&t=224s Battery Discharge Protection Circuit: Designed by me last summer :) This circuit monitors the battery voltage and disconnects it from the load at around 2.52V. It needs an external signal such as a switch or an Arduino digital write to turn on the battery once it disconnects. When the battery dies, the circuit disconnects itself from the battery, drawing zero current in its off state. Lithium-Ion Batteries Research: batteryuniversity.com/learn/article/lithium_based_batteries Social ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Website: devoncrawford.io Twitter: twitter.com/DevonCrawford13 Snapchat: snapchat.com/add/devoncrawfordyt Instagram: instagram.com/devoncrawford_ Github: github.com/devoncrawford Discord: discord.gg/sU2fur9 Patreon: patreon.com/devoncrawford Gear ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ - Video Editing Software (Premiere Pro CC): goo.gl/rKx66D - All Adobe Apps (I use this plan): goo.gl/hrTYFS - Keyboard (Velocifire TKL01) : amzn.to/2AQTjJQ - Monitors (Dell U2518D) : amzn.to/2AQQmco - Webcam (Logitech C920): amzn.to/2Cw588c - Desk Microphone (Blue Yeti): amzn.to/2FPFmzi - DSLR (Canon T7i): amzn.to/2T54mpZ - Wide Lens (Tokina 11-16mm F2.8): amzn.to/2MlpvcO - Full list of gear: devoncrawford.io/gear Music ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ BVLLVH - fool around Link: soundcloud.com/bvllvh/fool-around-prod-bvllvh zodivk - passionfruit(+) Link: soundcloud.com/zodivk/passionfruit ₪ jetson - ㅤㅤtemporary °ㅤㅤ Link: soundcloud.com/highimjetson/temporary Mozaic - Transition Link: soundcloud.com/eclecticimprint/transition