GPIO pins on 633

[lcdud]

Is there a way to control the GPIO pins on the 633 independently of the ATX functions? If so, what kind of currents can they sink or source?

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[CF Tech]

There is no "standard" support for the GPIOs right now. We will customize them to meet the needs of OEM customers on demand.

The pins are rated at + - 20mA.

 

[lcdud]

Bummer... ok, can I do the following:

A Fan connector at 0% is "off",
a Fan connector at 100% is "on",

is there any ripple from the PWM motor-speed control on there, or could I "abuse" these ports by connecting a 12V relay (400Ohms = 30mA) with appropriate diode?

 

[CF Tech]

It should be fine to operate a relay using the fan connector. You might want to insert a "catch diode" just to be sure.

What are you trying to control?

 

[lcdud]

It should be fine to operate a relay using the fan connector. You might want to insert a "catch diode" just to be sure.

What are you trying to control?

great, just found a 12V dip relay with built-in clamping diode and 1260 Ohms coil. Right now I have a couple of ideas... fueled by the knowledge that 19200 RS232 runs 100ft or better, I can see a number of spots in the house where an LCD might do well.

Can I run the module on a remote power supply (provided it's 5/12) and connect only the Rx/Tx/GND wires on the serial?

I know, lot's of questions. Thanks for the help in advance.

 

[lcdud]

btw, if only the pwm duty-cycle was programmable, we could use the fan-connector directly to control an RC servo

 

[CF Tech]

It should not hurt to separate the power supplies, as long as ground is common.