Re: [DIYbio] Electronic requirements for redesign of Arduino PCR thermal cycler

Cartridge Heater 3/8" Diameter, 3.2" Length, 220VAC, 300W
25A SSR-25 DA Solid State Relay Input: DC 3-32V Output: AC 24V-380V
Arduino board Pro Mini atmega328 5V 16M, DC input: 5V up to 12V, Max 150mA output
MAX6675 Module, Working voltage: DC5V, Operating Current: 50mA
100cm Length Wire Teflon line K-type Thermocouple Sensor Temperature Probe
60mm x 60mm x 15mm 3 Pin 12V Cooling Fan
12V Transistor (TIP120) TIP120 TO-220 Darlington Transistors 60V 5A NPN
Yeah, fair enough.

I've attached the original circuit schematic in a .gif format, which is the only one I can find. And a rough BOM in a .txt file with as much relevant information as I could provide. The difference in the circuit schematic is that the two resistors would be replaced by the cartridge heater.

The mains power supply is 230V, 50Hz for New Zealand (you were close with Australia), and apparently the peak voltage would be 325V (230*sqrt(2)), though I'm not sure if that last bit of information actually helps.

Thanks for your help John (and I don't mean that sarcastically).

Andy.

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