Difference between revisions of "Interface the HX711 to Pi"

Revision as of 06:17, 19 April 2014

Two DCT Electronic HX711 boards with metal shield.

DCT Electronic HX711 board plugged into P5

Building a Raspberry based electronic scale using the DCT Electronic HX711 board is as easy as Pi!

The DCT board comes with two sets of male headers, straight and right angle, and a metal shield.

Order the board for $6.99 on Ebay
This one for $2.19 should work, too.
Download the software from gitHub
git clone https://github.com/ggurov/hx711
Solder a 1x4 straight female header in P5 on Pi (bottom side of board) and a 1x4 male header on the DCT board
Solder the load cells to the DCT board.
Plug the DTC board into the Pi.
Change the GPIO pins in hx711.c from 30 and 31 to 28 and 30. This way they are all on one side of P5:

#define CLOCK_PIN       30
#define DATA_PIN        28

@@ Line 5: / Line 5: @@
 The DCT board comes with two sets of male headers, straight and right angle, and a metal shield.
-You will need a female header 1x4 ([http://www.amazon.com/Gino-2-54mm-Straight-Single-Headers/dp/B00899WQ6U/ref=sr_1_1?s=electronics&ie=UTF8&qid=1397881924&sr=1-1&keywords=headers 2.54mm Pitch Straight Single Row PCB Female Pin Headers]) and load cells.
+You will need a 1x4 female header ([http://www.amazon.com/Gino-2-54mm-Straight-Single-Headers/dp/B00899WQ6U/ref=sr_1_1?s=electronics&ie=UTF8&qid=1397881924&sr=1-1&keywords=headers 2.54mm Pitch Straight Single Row PCB Female Pin Headers]) and [http://www.phidgets.com/products.php?category=34&product_id=3135_0 load cells].
 #Order the board for $6.99 on [http://www.ebay.com/itm/Weighing-Sensor-AD-Module-Dual-channel-24-bit-a-d-Conversion-HX711-Shieding-/400460838550 Ebay]<br>[http://www.ebay.com/itm/Weighing-Sensor-AD-Module-Dual-channel-24-bit-a-d-Conversion-HX711-Shieding-/400460838550 This one] for $2.19 should work, too.