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geekhack Marketplace => Great Finds => Topic started by: didjamatic on Mon, 05 April 2010, 14:03:48

Title: Vintage HP
Post by: didjamatic on Mon, 05 April 2010, 14:03:48

Vintage HP 85-B Computer (http://cgi.ebay.com/HP-85B-Computer-New-QIC-Drive-Hewlett-Packard-HP85B_W0QQitemZ290421755460QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item439e7c4e44#ht_11555wt_1021) - check keyboard pics.

(http://www.motionsoftware.com/downloads/ebayphotos/hp85/hp85B_1_3.jpg)
(http://www.motionsoftware.com/downloads/ebayphotos/hp85/hp85_4_10.jpg)

Title: Vintage HP
Post by: ch_123 on Mon, 05 April 2010, 14:07:53

Those look like the switches used in the DEC VT-100. Inside the plastic border there are two arms with electrical contacts on them. The depression of the border causes the two arms to move together until they meet and the circuit is made.

Did I mention that they're boring linear switches?

Title: Vintage HP
Post by: didjamatic on Mon, 05 April 2010, 14:12:59

Ah, same concept as Space Invader Switches then.

(http://lh6.ggpht.com/_-sQ6TN93LvU/Sxpw7u4RtdI/AAAAAAAAAFE/JZ9OtquD0Dc/s800/10%20126.jpg)