Thread
SE/30 soft power
Here is an alternative modification proposal, and slightly easier.
Pitfall: I cannot guarantee the regulation circuits as they will continue to have power during standby, So upon restart, an overshoot condition could occur before the power supply quickly recovers and stabilizes. This is why I chose the relay method cutting the entire 12V supply to the oscillator and control circuitry.
Pitfall: I cannot guarantee the regulation circuits as they will continue to have power during standby, So upon restart, an overshoot condition could occur before the power supply quickly recovers and stabilizes. This is why I chose the relay method cutting the entire 12V supply to the oscillator and control circuitry.
Oh, also, if you have a bad switching IC MB3759, It would be helpful to note you can replace this IC with your off-the-shelf common TL494 which is used in just about everything and is still being produced.
TL494 is a drop in replacement.
TL494 is a drop in replacement.
Re: the ADB signal . . .
The PB100 somehow has the ADB signal present on its Power Connector! I remember thinking how cool that might be for creating a rudimentary single plug Docking Station for BabyPB. At the time I was using it at my computer workstation (ergonomically correct) in the big closet I'd built next to the dining room table in our NYC co-op apartment.
Since the standard 100 series wall wart is a two is a simple two contact power plug, there must be a way to simply pipe the ADB signal to one or the other of these wires to get it into you external box. Such a circuit inside the SE/30 would prune back the cable monster a bit.
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On another note: check out the new developments in Switching Mac PSU's @$$tBits + ATX = ?????
I may not have been reading your OP correctly, but I've sourced a 250W ITX PSU that fits inside the IIsi PSU's sheet metal. IIRC, this is about the same size as your SE/30's PSU if not exactly the same PSU? Maybe you can stuff your proposed external box inside your SE/30?
I was reading your post in 68k Soft/Hard 68k Power and ATX conversions . . . and remembered something interesting:
The PB100 somehow has the ADB signal present on its Power Connector! I remember thinking how cool that might be for creating a rudimentary single plug Docking Station for BabyPB. At the time I was using it at my computer workstation (ergonomically correct) in the big closet I'd built next to the dining room table in our NYC co-op apartment.
Since the standard 100 series wall wart is a two is a simple two contact power plug, there must be a way to simply pipe the ADB signal to one or the other of these wires to get it into you external box. Such a circuit inside the SE/30 would prune back the cable monster a bit.
_________________________________________________________________________________
On another note: check out the new developments in Switching Mac PSU's @$$tBits + ATX = ?????
I may not have been reading your OP correctly, but I've sourced a 250W ITX PSU that fits inside the IIsi PSU's sheet metal. IIRC, this is about the same size as your SE/30's PSU if not exactly the same PSU? Maybe you can stuff your proposed external box inside your SE/30?