Update Shredder Pro Drawings

3. Build the machines/5. Shredder Pro/Shredder-Pro-Files/4 - Schematic/README.md

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+# Auto reverse for Precious Plastic Shredder!
+
+Hi all 🖐,
+here we doocument how to enable jam detection and autoreverse for shredder.
+
+More background info about the project can be found here: [Forum topic](https://davehakkens.nl/community/forums/topic/v4-shredder-arduino-code/).
+
+For now we have:
+
+- Arduino code
+- Flowchart
+- Wiring diagram
+
+## Principle of operation
+
+Use a microncontroller and hall effect sensor to measure motor current consumption and control motor rotation through relays.
+It uses a 3 position switch to enable shredding and manual reversing.
+
+## Arduino
+Install required libraries:
+
+- LiquidCrystal I2C
+- Wire
+
+Both can be installed using Ardunio Library Manager (available from IDE version 1.6.2)
+Sketch -> Include Library -> Manage Libraries ...
+
+Load shredderControl/shredderControl.ino to microcontroler
+
+### Params tunning
+Running params can be tunned for your particular setup via serial port
+
+Send "config" to enter into configuration mode, current reads will stop waiting for configuration
+Send values separated via comas (all are ints)
+
+`configV, v0A, startSpan, maxJams, minJamTime, unjamReverseT, maxCurrent`
+
+Default values are:
+
+`0,538,500,3,15000,3000,12`
+
+You can load default values by sending "reset"
+
+> GUI for configuration is being developed
+
+## WIP
+
+Things that are still on the TODO list:
+
+- [ ] Circuit diagram & PCB
+- [ x ] Allow configuring parameters from GUI
+- [ ] List of components