Just sharing my build here. Hopefully it's helpful for other diy-ers who want to build something like this.
Again build on a budget since I have more time than money LOL.
Scale works as usual, throw the bulk of the charge and with only one push of the button the trickler
tops powder up to the desired weight, shuts motor off and resets for the next cycle.
I am still waiting for a motor speed regulator from ebay so I can reduce the speed (drop rate) in case it drops larger kernels to fast.
Tested it with H335 and works great.
What I would do different next time is ordering the right sensor. I accidentally ordered a NO (normally open) contact one and should have been an NC (normally closed).
Since I did not want to wait another 6 weeks or so to get the right one I had to hook up a 12v NC relay to the circuit to make it work.
Material cost is roughly $ 21.00 after taxes for the sensor, motor, 12vdc wall wart transformer, magnets, plastic box, cable connector, momentary switch, circuit bread board and terminal strip including shipping cost for motor and sensor.
Other bits and pieces were just laying around in my garage (there is a lot of stuff there, you don't want to know..) and relays were salvaged from old electronics.
Momentary switch is wired up as a "latching relay" situation so it stays on until the sensor calls it enough.
The metal part is put on with double sided tape so in case I want to sell the scale at some point I can restore it
to original condition without holes drilled etc.
Again build on a budget since I have more time than money LOL.
Scale works as usual, throw the bulk of the charge and with only one push of the button the trickler
tops powder up to the desired weight, shuts motor off and resets for the next cycle.
I am still waiting for a motor speed regulator from ebay so I can reduce the speed (drop rate) in case it drops larger kernels to fast.
Tested it with H335 and works great.
What I would do different next time is ordering the right sensor. I accidentally ordered a NO (normally open) contact one and should have been an NC (normally closed).
Since I did not want to wait another 6 weeks or so to get the right one I had to hook up a 12v NC relay to the circuit to make it work.
Material cost is roughly $ 21.00 after taxes for the sensor, motor, 12vdc wall wart transformer, magnets, plastic box, cable connector, momentary switch, circuit bread board and terminal strip including shipping cost for motor and sensor.
Other bits and pieces were just laying around in my garage (there is a lot of stuff there, you don't want to know..) and relays were salvaged from old electronics.
Momentary switch is wired up as a "latching relay" situation so it stays on until the sensor calls it enough.
The metal part is put on with double sided tape so in case I want to sell the scale at some point I can restore it
to original condition without holes drilled etc.
Last edited:
