I’m trying to set up a water heating and cooling system using 3 Peltier devices connected to a digital controller STC-1000 (heating and cooling). To keep water at a content temperature 18C +-0.5 so heating below 17.5C and cooling above18.5C
The point is to heat and cool using the same Peltier devices by reversing the polarity, the problem I have got is the controller switches the Pos only (the Neg is constant). So how can I make it reverse the polarity on the Peltier to change from heating to cooling.
I have the device working well manually using a 6 pole DPDT Toggle switch (on-off-on reverse polarity). My problem is I can’t get it to work of the timer because it uses the common neg. these controllers are designed to use different devices for heating an cooling switching them ion and off ndividually .. I want to reverse polarity of the same device to do the same job .. but its got me stumped.
The point is to heat and cool using the same Peltier devices by reversing the polarity, the problem I have got is the controller switches the Pos only (the Neg is constant). So how can I make it reverse the polarity on the Peltier to change from heating to cooling.
I have the device working well manually using a 6 pole DPDT Toggle switch (on-off-on reverse polarity). My problem is I can’t get it to work of the timer because it uses the common neg. these controllers are designed to use different devices for heating an cooling switching them ion and off ndividually .. I want to reverse polarity of the same device to do the same job .. but its got me stumped.