#garfield Logs

Jan 22 2023

07:43 AM rue_mohr: <rue_mohr> marking codes:
07:54 AM rue_mohr: <rue_mohr> 13T
07:54 AM rue_mohr: <rue_mohr> KNM
09:01 AM rue_shop1: so
09:01 AM rue_shop1: nobody uses these dual transitors
09:02 AM rue_shop1: not dual NPN or NPN+PNP
09:02 AM rue_shop1: nowonder they are not cheap from china
09:06 AM rue_shop1: I got test code that oscillates the motor at 1.3kHz
03:49 PM rue_shop1: https://www.google.com/url?sa=i&url=https%3A%2F%2Fappiontools.com%2Fcontent%2FG5Twin_Manual.pdf&psig=AOvVaw2MpA4GCQ9WhVLULQKd6IDd&ust=1674509575086000&source=images&cd=vfe&ved=0CA4QjhxqFwoTCKDVpbaQ3PwCFQAAAAAdAAAAABAZ
04:21 PM Tom_L: all that for a redirect
09:08 PM aandrew: what are those working codes?
10:09 PM rue_shop3: marking codes for dual transistor NPN/PNP
10:10 PM rue_shop3: I want to make PUT boards
10:10 PM rue_shop3: they seemed like the logical choice, but
10:10 PM rue_shop3: NOBODY uses those parts, I went thru all the boards here, and there aren't any used to anywhere
10:11 PM rue_shop3: so although I bought some from china, I'm going to probably design a board that uses two sot23 transistors
10:11 PM Tom_L: PUT?
10:11 PM rue_shop3: programmable unijunction transistor
10:11 PM rue_shop3: its an anti-SCR
10:12 PM rue_shop3: the trigger comes off the other side of the device
10:12 PM Tom_L: those are old aren't they?
10:12 PM Tom_L: like darlington pair old?
10:16 PM rue_shop3: yea they dont really do them anymore
10:18 PM Tom_L: not sure i ever ran across one
10:18 PM Tom_L: if i did i don't recall it
10:18 PM Tom_L: just like germanium