I am working on a project that requires a few electromagnets that have to attract small nails and then release them. The nails are on a wooden canvas (6mm thick) and they are surrounded by small glass covers. Electromagnets have to stay on the other side of the canvas and attract/release the nails which then fall on the glass and make tiny noises.
What kind of magnets would you reccoment?
I tried one that has a rating of 5KG at 12V but its very weak.
Is there also any driver needed for connecting it on Arduino?
Input Voltage: 12VDC
Power Consumption: 4W
Rated working current: 0.33A
Holding Force: 5kg / 11lbs
I tested it with two 9v batteries resulting in 18v. But its very weak.
I know that lifting force is less than holding force and I am also aware
of the inverse cube law, but still the distance is really very small and wonder
what should be the rating in order to achieve a strong field.
maronid:
..... a few electromagnets that have to attract small nails and then release them.
You might find that nails are not a good shape for being attracted to the electromagnets, exposing quite a complex shape that will inevitably distort the magnetic field.
Give it a try with some small ball bearings instead, which will always expose the same shape, and the maximum area, no matter what their orientation is w.r.t. the field
I am working on a project that requires a few electromagnets that have to attract small nails and then release them. The nails are on a wooden canvas (6mm thick) and they are surrounded by small glass covers. Electromagnets have to stay on the other side of the canvas and attract/release the nails which then fall on the glass and make tiny noises.
What kind of magnets would you reccoment?
I tried one that has a rating of 5KG at 12V but its very weak.
Is there also any driver needed for connecting it on Arduino?
mDSP
Seems like you want this project to cycle more than once. Do your magnets also need to pick up the nails from the glass? If so, you need to include that distance in your magnet calculation.
