Step 4: Planning to Connect It Up

I printed out the pin diagram and drew the external connections in. Peak and hold inputs were held inactive. The internal reference was used. The decimal points were set to be displayed, and the 2V/ 200mV selection would be by an external switch.
I've never heard of etching with saltwater. Could you please elaborate on this?
Webmaster, the thumbnails don't enlarge when clicked.
Where did you acquire the max1498. I seem to have a hard time finding them online for quantities under 1000. I was hoping to get maybe 5 of them.
Maxim will send you two pieces free if you just ask.
Since I was using recycled components, this prototype has an abundance of decoupling capacitors and unnecessary wiring. If you are interested in manufacturing this thing, you are best advised to go to the manufacturer's web site to look at the datasheets and other recommendations regarding assembly
forgive my question but this one reminds me of my counter project. if this were a push button queue counter for clients, how can u make the push button counter to have a 3-second delay? tnx :)
I might be wrong, but I cannot find any reference to the 1498 being calibrated at the factory. You are using the internal voltage reference which can vary anywhere between 2.007V and 2.089 with 2.048 being the nominal voltage. I see that it has offset calibration but that can't be confused as span calibration. If your reference voltage can vary +-2% then your measurements can off be 2%. This only gives you about 3 digits of accuracy Still this is a very cool part and project.
Cool, Another one of those Kick Butt PCB board designs

About This Instructable




Bio: Hi. I'm Chandra Sekhar, and I live at the southern tip of the Indian subcontinent. I'm interested in building small one-off circuits around ... More »
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