Pull-up jumpers

Q&A for AnalogX Analog to CAN interface. <a href="https://wiki.autosportlabs.com/AnalogX">Installation and Operation Guide</a>
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petik
Posts: 16
Joined: Sat Jan 30, 2016 2:47 am

Pull-up jumpers

Post by petik »

Just got my analogx recently and i'm wiring up an oil temp gauge. Looks like there are pads on the back of the pcb to solder down a 2.2k. What I wanted to clarify is how the wiring should look like at this point if the 2.2k is on board. Does that mean that I only connect the ground and the input and skip wiring in the 5V (since it is internally pulled up? Also, what size SMD resistor is recommended (i.e. - 0604)?

brentp
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Joined: Wed Jan 24, 2007 6:36 am

Post by brentp »

Hi,

Those pads are for jumpering to enable a 2.2K pull-up resistor that is already on-board. You do not need to solder a 2.2K resistor in that place.

Normally the jumper is open; to enable the resistor, solder across the joint.

Also please make note of the possible limitations using thermistor-based (non linear) sensors here:
https://wiki.autosportlabs.com/AnalogX# ... ct_systems

Regards,
Brent Picasso
CEO and Founder, Autosport Labs
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petik
Posts: 16
Joined: Sat Jan 30, 2016 2:47 am

Post by petik »

brentp wrote:Hi,

Those pads are for jumpering to enable a 2.2K pull-up resistor that is already on-board. You do not need to solder a 2.2K resistor in that place.

Normally the jumper is open; to enable the resistor, solder across the joint.

Also please make note of the possible limitations using thermistor-based (non linear) sensors here:
https://wiki.autosportlabs.com/AnalogX# ... ct_systems

Regards,
Thanks Brent. I'm hooking up oil temp so i'm reasonably happy with just having accuracy at >200F.

brentp
Site Admin
Posts: 6281
Joined: Wed Jan 24, 2007 6:36 am

Post by brentp »

Makes sense. Glad that will work for you!
Brent Picasso
CEO and Founder, Autosport Labs
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