Baldilocks
New Member
Hi, I've been out of electronics for about 10+ years and have gone a little rusty!
I want to use my basic stamp kit (I've got quite a lot) to run a small stepper, then use it to operate a length of Nitinol. The project is to measure out accurate lengths of magnesium ribbon using a stepper, then cutting it with a Nitinol actuated cutter (scissors!).
I believe that I can drive a power mosfet (diode protected) directly from the stamp, and the stepper directly from the mosfet. The only additional components are a couple of resistors - a few 10s of k in series with the gate and a meg or so from gate to drain to protect from static.
Picbits have a IRF540 28A 100v at 25p which look good to me for both the stepper and the wire. They also have a 24v 0.6A stepper which might be OK (I don't particularly want to use 24V - I work in a school and 12V is much more accessible.)
**broken link removed**
**broken link removed**
Has anyone got any comments?
I want to use my basic stamp kit (I've got quite a lot) to run a small stepper, then use it to operate a length of Nitinol. The project is to measure out accurate lengths of magnesium ribbon using a stepper, then cutting it with a Nitinol actuated cutter (scissors!).
I believe that I can drive a power mosfet (diode protected) directly from the stamp, and the stepper directly from the mosfet. The only additional components are a couple of resistors - a few 10s of k in series with the gate and a meg or so from gate to drain to protect from static.
Picbits have a IRF540 28A 100v at 25p which look good to me for both the stepper and the wire. They also have a 24v 0.6A stepper which might be OK (I don't particularly want to use 24V - I work in a school and 12V is much more accessible.)
**broken link removed**
**broken link removed**
Has anyone got any comments?