Depending on the needs, each ATX computer power supply has the necessary voltage to supply the Peltier Modules. Molex plug (power supply for ATA drives and disks - http://pl.wikipedia.org/wiki/Molex), has the following cables:
- yellow + 12V
- black - GND - mass
- black - GND - mass
- red + 5V
for example:
When connecting the modules between terminals: ground and + 5V - the cell will emit less energy, so it will not need a large heat sink to dissipate heat.
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