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- From: devos@eba.eb.ele.tue.nl (Gert Jan de Vos)
- Newsgroups: comp.sys.acorn.tech
- Subject: Re: IDEDisc4 DEADDEAD: Alive!
- Date: 29 Nov 1993 14:47:34 +0100
-
-
- Thanks to everyone who replied, I reconnected the drive with a friend's
- datacable and now it works fine, even though my own cable seems to be fine
- when checked with a multi-meter. The fan regulator is working fine
- too, here is a schematic of this simple but effective regulator:
-
- +-----//-----+-------+-------+---o +12V
- | | | |
- \ | \ |
- / 10k | / | T1: Any NPN will do, eg: BC550
- \ NTC | 820 \ | T2: PNP which can go up to 2A,
- / 330uF |+ / | eg: BD238
- \ 16V === \ | '-
- | | +----|< T2 Use P1 to select a default
- | | | / | \ fan speed such that the fan
- +-----//-----+----|< T1 | will always keep running.
- | | -' |
- | | 10k |
- | +-/\/\/-+---o Fan+
- | | |P1 |
- \ \ +---+
- / / |
- 2k \ 270 \ ---
- / / / \
- \ \ |
- | | |
- +-------+-------+---o GND
-
- Gert-Jan
- --
- Gert-Jan de Vos devos@eb.ele.tue.nl | No matter what problem,
- Dpt. of Electrical Engineering | there's always a solution
- Digital Information Systems Group | which is simple,elegant
- Room EH11.26 Eindhoven University of Technology | and wrong...
-
-
-