/challenges-projects/design-challenges/smarter-life/b/blog/posts/oven-control-with-psoc-4-post-7I started with the op-amps. I put it in the non-inverting mode, I measured the voltage at the Arduino compatible I/O header J2. I could measure only digital voltage VDD = 3.42 volt. When the noninverting input is connected to VSS the outp...en-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/smarter-life/b/blog/posts/oven-control-with-psoc-4-post-7Sun, 22 Dec 2013 16:07:50 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:8d8b787a-a04a-496d-8feb-93cd22e6f35fvsluiter2<p>Hi Dab,</p><p>It&#39;s not that weird is it? Looks like a standard noninverting opamp...Pin2 has a voltage divider as input, and pin 1 is the inverting input. Output voltage would be ( 1+(10k/20k))*Vin.</p><p>&nbsp;</p><p>Mala: please do check all connections, I think you can also set up an opamp as buffer. If you&#39;re missing the feedback resistor it &#39;ll act as a comparator....</p><img src="https://community.element14.com/aggbug?PostID=17060&AppID=105&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/design-challenges/smarter-life/b/blog/posts/oven-control-with-psoc-4-post-7Sat, 21 Dec 2013 19:44:29 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:8d8b787a-a04a-496d-8feb-93cd22e6f35fDAB0<p>I have not seen an Opamp connected like that.</p><p>&nbsp;</p><p>I would go back to basics and set it up for unity gain, ground the + input, setup the 10K potentiometer between vcc and ground with the center tap as the input to the - input and then watch the output as you lower the voltage on the input.</p><p>&nbsp;</p><p>If there is an issue, I am sure the Cypress people can get it worked out for you.</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=17060&AppID=105&AppType=Weblog&ContentType=0" width="1" height="1">