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[ts-7000] Relays at 7200 DIO

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Subject: [ts-7000] Relays at 7200 DIO
From: "carreras_marcos" <>
Date: Fri, 22 Jan 2010 13:59:11 -0000
Good morning folks!,
I need to drive two relays connected to both DIOs at my TS-7200. Due to the 
sink at these lines are 4mA ( 3,3V ), will need to drive them by using  
optocouplers. Any idea of which PN I Could use?, FYI, the Ic at the output 
stage, would have to drive a 260R coil ( around 40mA )

The second part of the question ( or the other question ) is:

Need to connect a 16x2 display at the Display port. I TS port has direct 
connection to the display ( based on a HD44780 ). My question is related to the 
contrast adjustment pin, which in the TS is biased to ground thru a 620R 
resistor. How should I connect this pin to the display one?

Thank you very much for your help...

Marcos





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