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  1. Now that PWM controlled fans are so common, how cool would it be to build on that idea and have a fully software controlled fan as a menubar extension on classic macs there's a library here https://create.arduino.cc/projecthub/tylerpeppy/25-khz-4-pin-pwm-fan-control-with-arduino-uno-3005a1 and I'm sure the arduino could handle reading the fan tacho signal too
  2. What kind of issues? It would be nice to know some of the symptoms, I have trouble with sata/ide drive corruption on mine unless i run it off a slow scsi2sd drive. It will often just lock up doing heavy IO from the cdrom drive too, it's been really frustrating. Did you just recap the small smd cans or the large electrolytics too?
  3. I wonder how hard it would be to take it further and automatically turn the screen off and on based on the video signal, switching the sweep voltage off if there's not a single bright pixel detected in 20 seconds or something. DIY DPMS
  4. I'd say a typical single cpu tower computer usually draws somewhere around 100W when idling and 150-200W when working hard, the trick would be how to implement a working thermostat so you have a feature complete space heater... Maybe hook a digital thermometer to a serial port and write a simple program to only waste cpu cycles when the room temperature is below the setpoint? http://ppcluddite.blogspot.com/2012/07/power-consumption-on-power-macs.html has some more exact figures for various tower macs. Seems like the G5 is the one to get if you want a proper furnace! I
  5. Thanks everyone for sharing your repair experiences, it was an awesome help to finally get my SE/30 recapped and fixed. I was stumped by the black vertical lines but after inspecting the corrosion damage around the old caps under a microscope and thinking that maybe there's something I'm not seeing, I finally desoldered UE8 and found the broken trace. A bodge wire later and my SE/30 is good as new. Now that I have a microscope it's making me really want a ultrasonic cleaner because the corrosion looks really disgusting up close and brushing with IPA apparently just smears it around
  6. I still think the dishwasher is a worthwhile final Hail Mary after hosing down a board with contact cleaner, manually scrubbing with IPA and vinegar didn't work, it's revived a lot of boards for me. No lead poisoning yet but I do run a bunch of machine cleaning cycles afterwards to get the worst electronics smell out of it The biggest downside of the dishwasher is probably that anything that gets knocked off the board is going down the drain never to be seen again. One of my 840av boards lost some tiny SMD components that way and I haven't been able to restore it. An
  7. For what it's worth I'm not using any SCSI device at all in my beige g3. It boots from a 120gb ssd (partitioned as 4g,4g,50g,60g) through a SATA-IDE bridge and the CDROM is an IDE cdrw model I grabbed from an old G4 tower. You should be able to install a wide range of old generic IDE cdroms i think. I would save the expensive SCSI2SD for an older Mac without IDE. As for modifying the IDE cable I had a tiny 1mm drill bit and carefully drilled out the plastic from the connector so I could push it into the motherboard. The blocked hole is pin 20, you only have to drill the motherboard
  8. It was a complete nightmare to remove the pins from my new ATX supply to rewire the plug, even with the right pin removal tools from ebay it took at least an hour just to learn a working method to release the pins. If i had to do it again I would much rather buy an extension cable like in the instructions I linked, cut the wires that have to be changed and solder them back together while leaving the plug pins alone. As long as you're not in a hurry the proper cable is quite cheap to get, something like https://www.amazon.com/24-Pin-Detachable-Extension-Conversion-Cable
  9. I had all sorts of trouble getting my Beige G3 to install and boot MacOS from SSD until I replaced the 40 wire cable with a newer 80 wire one. You might have to modify the new cable too since the mac doesn't have the key pin removed from the IDE pin header on the motherboard. The beige g3 tower is also not terribly difficult to mod to use a standard ATX power supply, I have a brand new one in mine. You have to rewire some pins in the power cable and make sure the jumpers are set correctly on the motherboard to avoid damaging it. I followed this guide: https://forums.macrumors.com/t
  10. On a lot of the mac boards I've recapped there's a tiny dot of glue under each of the caps, probably to stop them from moving around during production before going into the reflow oven. I've had some accidents with ripped pads trying to lift them off with hot tweezers, but now I've bought a hot air rework station after I saw someone use hot air to remove them in a youtube video with great results. It softens the glue and makes it really easy to lift the caps off, you just have to be careful not to melt other components in the vicinity of the caps.
  11. Wohoo I got it to work! The solution was to replace the standard 40 wire IDE cable with a modern 80 wire IDE cable, I think that improved the signal integrity enough that the SATA bridge works reliably The only tricky bit is that the IDE connector on the motherboard has all 40 pins while the new cable had a key and wouldn't fit. I decided to drill a hole through the key position, i think you could just cut off pin 20 on the board but I didn't want to mess up and cut the wrong pin, hacking the cable seemed less scary... If anyone else is struggling with unreliable SATA
  12. Thanks! It didn't solve the problem but at least it clued me in on what the problem might be. Silverlining includes a TimeDrive benchmarking tool that reported tons of read errors during testing. It seems like writing to the drive works fine but reading the data back causes a lot of garbage. That explains why I can install the OS but not boot from it. I'll try to find a different SATA/IDE bridge, I think it's probably the bridge chipset that doesn't like the ATA controller in the G3.
  13. I'd love to know some confirmed working combinations.. I've tried a SATA to IDE bridge in my new PowerMac G3 Beige with three different SSDs (intel, ocz and kingston) and although all of them showed up and would let me partition, format and install an OS on them the machine would either instantly freeze or crash with bus errors and illegal instructions when I tried to boot from them. I made sure the partitions I installed to was on the first 8gb of the drives, too... I've ordered a CF slot adapter to boot from, hopefully that will work better. The IDE to mSATA adapters
  14. On my Quadra 840AV i thought networking was broken on my logic board because it didn't seem to send anything through the AAUI adapter and I couldn't ping it even with a static IP, but it turned out I had to use the Appletalk control panel to switch appletalk over from the printer port to the ethernet port and then suddenly TCP/IP started working as well in MacOS 8.1. No idea if that is a bug or limitation or what. I'm just happy it works now
  15. This is system 7.5.3 and Norton 3.5. Getting slight powermac 9600 envy from that system ratings table! I'm glad to see all those rounds in the dish washer made my mac slightly faster than your average 840
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