PiSCSI / piscsi

PiSCSI allows a Raspberry Pi to function as emulated SCSI devices (hard disk, CD-ROM, and others) for vintage SCSI-based computers and devices. This is a fork of the RaSCSI project by GIMONS.

https://piscsi.org

BSD 3-Clause "New" or "Revised" License

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Heat question for SN74LS641-1 #484

Closed timmcross closed 3 years ago

timmcross commented 3 years ago

Info

Which version of Pi are you using: 3B+
Which github revision of software: master
Which board version: 2.4a
Which computer is the RaSCSI connected to: p4 1.5GHz, Adaptec 2940, WinXP

Describe the issue

First off, great project! Built the board from the ground up and worked the first time!

One thing I noticed was that the SN74LS641-1 chips get quite hot during operation. Is this expected? Would small heatsinks be recommended?

Thanks, Tim

rdmark commented 3 years ago

@timmcross The transceivers do run hot! They're rated for 70C, and anecdotally they run fine naked. If you have room for them, heatsinks probably won't hurt though!

See this post for more details: https://68kmla.org/bb/index.php?threads/rascsi-development-thread.6868/post-426873

Pacjunk commented 3 years ago

Here's mine. I use "RAM chip heatsinks". They still get quite hot, but anything is better than nothing. Haven't had any problems running for several hours.

20211127_190059 .

hsiboy commented 3 years ago

Yeah, mine run hot and sing! Depending on what Rascsi is doing, i can hear a faint whine coming from them.

rdmark commented 3 years ago

Added an FAQ entry for this. Closing out this ticket! https://github.com/akuker/RASCSI/wiki/FAQ