That's pretty cool. Too bad that the mechanism in the other drive is jammed.
Today on the bench: heating blankets.
These things are designed to fail after a while. The driver units are super simple.
Failure points here: the caps went bad (they serve as a capacitive dropper to provide the supply for the microcontroller). But also the 10 Ohm resistor burnt itself halfway open and took the thermal fuse next to it with it. I shorted that as a test until I can get a replacement.
These things are designed to fail after a while. The driver units are super simple.
Failure points here: the caps went bad (they serve as a capacitive dropper to provide the supply for the microcontroller). But also the 10 Ohm resistor burnt itself halfway open and took the thermal fuse next to it with it. I shorted that as a test until I can get a replacement.
The other heating blanket had a mechanical issue.
But the driver had already killed its dropper capacitor a while ago. This is a replacement. Those To-92 parts are the thyristors that switch the mains voltage through to the heating elements.
But the driver had already killed its dropper capacitor a while ago. This is a replacement. Those To-92 parts are the thyristors that switch the mains voltage through to the heating elements.
Newest acquisition: an IBM PS/2 Model 30. The 8086 variant.
This is one of those low end PS/2s that came with ISA instead of MCA.
This is one of those low end PS/2s that came with ISA instead of MCA.
The hard drive is a full height 3.5" affair, probably ESDI. But with this weird card edge connector. This is probably the only computer line that ever used these. So, there won't be a replacement for it.
I see lots of dirt, an empty CMOS battery that needs to go and a few of those explosive tantalums.
I bet the floppy drive needs work too.
I bet the floppy drive needs work too.