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started working on assembly instructions
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docs/1_ASSEMBLY.md
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# Robot assembly
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This file contains assembly instructions for building the robots and soldering the electronics.
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## Components
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The robot consists of the following components:
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* [Adafruit Mini 3-Layer Round Robot Chassis Kit](https://www.adafruit.com/product/3244)
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* [Wemos D1 mini](https://aliexpi.com/41SY)
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* [Wemos D1 mini battery shield](https://aliexpi.com/sNwB)
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* [Wemos D1 mini motor shield (v1.0.0)](https://aliexpi.com/wngF)
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* LiPo battery
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In addition you will need the following tools:
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* A soldering iron
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* Solder wire
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* Heat shrink tube
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* Some wires
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* Battery connectors (female)
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* Velcro tape
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* Self adhesive tape
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* Isolation tape
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* Pin headers
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For the camera based position detection of the robots you will need:
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* A camera
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* A printer
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* Paper
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* Cardboard
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## Assembly instructions
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#### Robot chassis
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Assemble the chassis according to the instructions provided by adafruit ([see here](https://learn.adafruit.com/tri-layer-mini-round-robot-chassis-kit)).
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### Soldering the electronics
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1. Solder on two rows of 8 male pin headers to the D1 mini
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![alt text](https://imaginaerraum.de/git/Telos4/RoboRally/raw/branch/master/docs/images/d1_mini_pins.jpg "")
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2. Solder on two rows of 8 female pin headers to the battery shield
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3. Solder on two rows of 8 female pin headers to the motor shield as well as a single row of bent pins. Make sure they are soldered on the right way around.
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4. In addition solder a jumper to the motor shield to connect the RTS and 3V pin. This will become important later on. Also solder the I2C bridge.
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- Note:
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3. Connect the + pin of the connector from the battery shield to the + pin of the motor shield.
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For this cut some small piece of wire and remove the isolation on both ends. then twist the ends and put some solder on both ends. Cut a piece of isolation and wrap it around the wire. Make sure you do this before soldering on the second end of the wire.
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After this is done, repeat the same with the - connection. Please make sure that you do not reverse the polarity!
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