English Amiga Board - View Single Post - Getting one working Floppy Drive from two non-working ones

solarmon · 15 April 2020, 17:22

I haven'y measured the voltage so I cannot say. I have been using a logic probe which will indicate a high or low signal.

What I have observed is the following behaviour of the hall effect sensor pins and test points (TP):

Pin 2 seems to be the output and when the motor is turned on, it will go HIGH and with LOW pulses for each time the magnet passes the hall effect sensor. This signal goes to the IC on the right for further processing.

This is the bahaviour on a working Panasonic drive. I do not get the LOW pulses on my non working Panasonic drive, even with a replacement hall effect chip. Which I do not know if it is the correct one unless I swap it out with the working drive, which I'm reluctant to do.

15 April 2020, 17:22	#27
solarmon Registered User Join Date: Dec 2018 Location: UK Posts: 1,716	I haven'y measured the voltage so I cannot say. I have been using a logic probe which will indicate a high or low signal. What I have observed is the following behaviour of the hall effect sensor pins and test points (TP): Pin 2 seems to be the output and when the motor is turned on, it will go HIGH and with LOW pulses for each time the magnet passes the hall effect sensor. This signal goes to the IC on the right for further processing. This is the bahaviour on a working Panasonic drive. I do not get the LOW pulses on my non working Panasonic drive, even with a replacement hall effect chip. Which I do not know if it is the correct one unless I swap it out with the working drive, which I'm reluctant to do.