Flame Tracker V1
The major difference is the wavelength of light that it detects. My original compound eye detects light at 940nm which is just below the visible spectrum. This sensor detects radiated heat which is at a much lower frequency of 5-14um.
The thermopiles used are TPS334 produced by PerkinElmer and the amplifier used is an LTC1053CN quad precision opamp which can work at 5V and has an output swing that is almost rail to rail. I have attached data sheets for both.
At the moment this is a work in progress. I have already thought of several improvements that will be implemented in a second version. Below is a schematic of the prototype. Click on the picture for a more detailed image.
As you can see I have put the thermopiles in groups of 2. The groups are just up, down, left, and right. The two thermopiles in each group are wired in series. Each thermopile includes a local 30K thermistor which can be used for calibration if precise temperature measurement is required. For now this is not used.