ToobieSnack
Well-known member
- Joined
- Mar 3, 2005
- Messages
- 493
hello all
xvlk has offered a wonderful solution for a DIY hall probe for measuring magnetic flux ..
questions:
what is ... smd - transistor?
what gets inserted into the magnetic gap? this smd device OR some kind of wire probe ??
known magnetic flux of FDD for comparison/calibration?
betamax device??????
here is his explaination:
can we colaborate and elaborate on this design ... so that we can all have this info for the future ..?
i had often wondered if a DIY hall probe was possible .. now ..
thanks to xvlk we have a solution ...
PRR don't you have a hard drive guru for assistance on this subject?
i thought i remembered you post something about your friend that is HD guru..
thanks again xvlk... :thumb:
looking forward to everyone's input on this so we can have a complete design with options pertaining to readily available materials.
thanks
ts
xvlk has offered a wonderful solution for a DIY hall probe for measuring magnetic flux ..
questions:
what is ... smd - transistor?
what gets inserted into the magnetic gap? this smd device OR some kind of wire probe ??
known magnetic flux of FDD for comparison/calibration?
betamax device??????
here is his explaination:
Hall probe is on every older Floppy disc drive.
it is some SMD-transistor looking device under magnet glued onto
inertor.
it have four legs - one grounded , one connected via resistor to +5 V
and two goes to the big IC.
that two connect to the multimeter and
measure mV.
the GND and + connect via resistor of several kOhms to the 4,5 or 9 V battery.
Then you must calibrate it. I use magend gap from HDD which I
calibrate at school metrology lab.
I never use FDD hall probe. I use Hall probes from old Betamax recorder.
xvlk
can we colaborate and elaborate on this design ... so that we can all have this info for the future ..?
i had often wondered if a DIY hall probe was possible .. now ..
thanks to xvlk we have a solution ...
PRR don't you have a hard drive guru for assistance on this subject?
i thought i remembered you post something about your friend that is HD guru..
thanks again xvlk... :thumb:
looking forward to everyone's input on this so we can have a complete design with options pertaining to readily available materials.
thanks
ts