Raspberry Pi 8486806 Handleiding


Lees hieronder de 📖 handleiding in het Nederlandse voor Raspberry Pi 8486806 (6 pagina's) in de categorie Niet gecategoriseerd. Deze handleiding was nuttig voor 40 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld

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Gertbot Advanced Rev 0.2 8-Sept.-2014
1
Gertbot Advanced
Rev-0.2, 8-Sept.- 2014
The Gertbot is a motor controller board for the Raspberry-Pi. For details how to operate it read the
Gertbot manual and/or the Gertbot GUI. This manual describes how to unlock some of the more
challenging features of the board.
Contents
Cascade. .................................................................................................................................................. 2
More current for DC motors. .................................................................................................................. 3
More current for Stepper motors. ............................................................................................................ 5
Going to DC 10 Amp. ............................................................................................................................. 5
Going to Stepper 10 Amp. ...................................................................................................................... 6
Uploading new software. ........................................................................................................................ 6
Board Erase. ............................................................................................................................................ 6
Gertbot Advanced Rev 0.2 8-Sept.-2014
2
Cascade.
To use two or more boards you need to make a cascade cable. That is a flat cable with up to four 8-pin
female headers. This is such a cable:
The length of the cable depends on how far apart you want to mount the boards. If you stack them
using 15mm stand-offs you need 120 mm cable. You also need an 8-pin IDC press connector per
board. I put a video on YouTube how to make a press connector a while ago:
http://www.youtube.com/watch?v=sMiRoXY_oZg.
The following picture shows an example how the cable can be connected to four boards.
Note that the jumpers on the picture above . You must give each board a unique ID. are wrong
The following diagram shows the with the jumpers: ID
ID=0 ID=1 ID=2 ID=3
Gertbot Advanced Rev 0.2 8-Sept.-2014
3
More current for DC motors.
One H-bridge can pass 2.5A. As we have four of them it is possible to combine bridges to allow more
then 2.5A. Here is the part of the schematics which deals with the signals we are going to mess about
with:
Beware the A1, A2, .. D2 here are NOT the out s of the bridge put
on the terminals. These are internal signals on the board.
H0, L0, H1, L1, H2, L2, H3, L3 are signals from the controller. They are going to the H-bridges to
control the outputs. Coming from the factory the following connections are present:
H0 A1 A2 H1→ L0→ →B1 B2 L1→
H2 H3 D1 D2→C1 C2 L2→ → L3→
To make two bridges work in parallel for a we have to give them the same control signals. DC motor
Thus to connect A and B in parallel we need the following connections:
H0 A1 A2→ L0→
H0→B1 B2 L0→
The board has a special layout to make this easy. In this case the board layout looks just like the
schematic: Un-solder R14, rotate it 90 degrees and solder it down again:


Product specificaties

Merk: Raspberry Pi
Categorie: Niet gecategoriseerd
Model: 8486806

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