Many beekeepers see the greatest challenge in the construction of the beehive’s weighing frame. As our picture gallery shows, there are many racks suitable for reproduction. In addition, our Facebook group also allows an exchange/trade among each other. In this article I would like to introduce the possibility to build your own scale rack. Otherwise there is the possibility to buy a scale on eBay (75€ incl. load cell). So completely without metal work like welding.
Build your own scale frame
Alexander has compiled an excellent documentation of his work, how he built the scale frame himself:
Modify eBay platform scale
As already mentioned in the article on load cells, it is possible to remove suitable load cells from an existing personal scale. Such scales are often inexpensive compared to the pure component prices. This variant behaves quite similarly. However, in addition to the load cell, this platform scale also includes the base frame for the apiary.
You can order the platform scale here: https://www.ebay.de/itm/Plattformwaage-Paketwaage-Bodenwaage-Industriewaage-klappbar-LED-150kg-10g-Akku/173660951761 But there are also alternatives from 50€ to 70€!
In the following picture gallery the steps for the conversion are shown. Many thanks to Martin!
The controller (it even has a lead-gel battery built in, you can still use it if you want to work with solar) and also the rod can actually be removed. What is needed is the load cell around the frame. To disconnect the controller from the rest, simply disconnect the cable inside the case.
The colours of the cables fit exactly to those in the description of the HX711. The built-in load cell outputs an analog signal that must be converted. The HX711 is used for this purpose. Now only the HX711 has to be connected to the Raspi.
Translated 06.10.2019 by JK