Motor - Revision history

Rew: /* Overview */

2017-09-09T07:12:44Z

Overview

2017-09-07T12:51:28Z

Datasheets

2016-04-22T06:35:00Z

Possible Configurations

2015-11-11T10:54:54Z

jumper settings

2015-11-02T11:50:25Z

2013-05-24T11:02:57Z

Jumper

2013-05-24T10:55:19Z

Jumper

2012-11-21T15:16:43Z

Pinout

2012-11-20T15:58:54Z

Jumper

2012-11-20T15:58:44Z

Jumper

@@ Line 8: / Line 8: @@
 This board is designed to control the direction and speed of two regular (brushed) DC motors, or one stepper motor.<br>
 It is of course also possible to (ab)use this board to control other loads, such as pumps, fans,  Peltier Elements, lightbulbs, etc.
+You can buy this board [https://www.bitwizard.nl/shop/Motor in our shop]
 == Assembly instructions ==

@@ Line 31: / Line 31: @@
 * [http://www.ti.com/lit/gpn/lm5109b The FET driver]
 * [http://www.fairchildsemi.com/ds/FD/FDS8884.pdf The 5A FETs]
 * [http://www.vishay.com/docs/65709/sij458dp.pdf The 15A FETs]
+Note: Each time we need to order new FETs it turns out the manufacturers have improved and that we can get better fets at a lower price. So... you might have FETs with better specs than these.
 == Additional software ==

@@ Line 21: / Line 21: @@
 === Possible Configurations ===
-We ship two different versions of this device; a 5A version, and a 15A version. A sticker on the bottom of the board defines which of the two it is.
+We ship two different versions of this device; a 5A version, and a 15A version.
 == External resources ==

@@ Line 82: / Line 82: @@
 The only LED is a power LED.
-== jumper settings ==
+== Jumper settings ==
 See [[solder jumpers]] on how to change the solder jumper.

@@ Line 1: / Line 1: @@
 [[File:SPI_motor.jpg|thumb|300px|alt=The SPI_motor PCB|The SPI_motor PCB]]
-This is the documentation page for the SPI_motor board.
+This is the documentation page for the SPI_motor board. That can be bought in the [http://www.bitwizard.nl/shop/expansion-boards/motor BitWizard shop].
 == Overview ==

@@ Line 70: / Line 70: @@
 | <10V || No jumper, external 10V to 14V power source connected to pin 2
 |-
-| 10V to 14V || Jumper on pins 1 and 2
+| 10V to 14V || Jumper on pins 1 and 2.  The motor voltage is used to drive the FETs
 |-
-| >14V || Jumper on pins 2 and 3
+| >14V || Jumper on pins 2 and 3. The onboard regulator generates 12V from the motor voltage.
 |}
+If a FET is built to use 12V gate voltages, it will only conduct partially when you drive it with lower voltages. The FET would run hot or self-destruct very quickly if that happens. So to prevent this from happening the FET-driver will not drive the FET at all if the gate-drive-voltage is not above 8V. That is why even if your motor runs on 5V you cannot use 5V for the gate-drive-voltage.
 === LEDs ===

@@ Line 64: / Line 64: @@
 === Jumper ===
-The FET drivers need a 8V to 14V power supply. Plese refer to the following table for the correct jumper settings:<br>
+The FET drivers need a 10V to 14V power supply. Please refer to the following table for the correct jumper settings:<br>
 {| border=1
 ! Motor voltage !! jumper setting

@@ Line 49: / Line 49: @@
 ! pin !! function
 |-
-| 1 || Output A1
+| 1 || Output B1
 |-
-| 2 || Output A2
+| 2 || Output B2
 |-
-| 3 || Output B1
+| 3 || Output A1
 |-
-| 4 || Output B2
+| 4 || Output A2
 |-
 | 5 || GND