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OpenerPCR circuit board done

A question we encounter frequently is:

When will the PCR machine be finished?

Because we have not built a time-travelling machine (yet), we simply don’t know.

As of yesterday, we do know that the circuit board is done (*)!

Over the last months,  we have changed our approach: instead of using the complex OpenPCR schematics and software, we started over from scratch. Taking a step-by-step approach where we thoroughly understand each step. When returning from the maker faire in Beneden Leeuwen, a new schematic was drawn from scratch and the project was called ‘OpenerPCR’. This week, the OpenerPCR circuit board was etched, soldered, tested, debugged and we got it working:

 

OpenerPcr_1_0_working

One can see the Peltier element (used for heating and cooling) at the bottom left, the relay board (with two LEDs on) at the bottom (used to create an H bridge) and a potentiometer on the right (for regulating the LCD contrast). The thermistor is beyond the edge of the picture. The LCD display shows the text ‘Hello DIYbio’ and the relays are powered, both by the Arduino software.

So, the OpenerPCR circuit board is done (*)!

(*) Let’s assume this, for today