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hr25_thermostat [2013/11/06 20:11]
Inhumierer [Modification of Honeywell HR25 thermostat] typos corrected
hr25_thermostat [2013/11/06 20:17]
Inhumierer [Integrate the additional electronics into the housing] typo corrected
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 To open the housing, lift the turn wheel with a flat piece of plastic to avoid scratches. To open the housing, lift the turn wheel with a flat piece of plastic to avoid scratches.
 It snaps off and you can look into the device (Figure 2). It snaps off and you can look into the device (Figure 2).
-Than remove the lock pins using the same plastic lever (see Figure 3, arrows to left and right).+Then remove the lock pins using the same plastic lever (see Figure 3, arrows to left and right).
 After pushing the 4 notches (see arrows in figure 5), the housing snaps open.  After pushing the 4 notches (see arrows in figure 5), the housing snaps open. 
 Unscrew the PCB (just 1 screw) and slide it out. Unscrew the PCB (just 1 screw) and slide it out.
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 ==== Integrate the additional electronics into the housing ==== ==== Integrate the additional electronics into the housing ====
  
-If a 2x3 PCB-pin connector is used for ISP, it is possible to hide it behind the turn wheel. This way it it easy accessible for reprogramming and there is little to no need to modify the housing or PCB((An other option would be to sacrifice the JTAG connector, cutting and wiring some connections.)).+If a 2x3 PCB-pin connector is used for ISP, it is possible to hide it behind the turn wheel. This way it it easy accessible for reprogramming and there is little to no need to modify the housing or PCB((Another ​option would be to sacrifice the JTAG connector, cutting and wiring some connections.)).
  
 The RFM12B fits well inside the thermostat housing between display and PCB. The RFM12B fits well inside the thermostat housing between display and PCB.
hr25_thermostat.txt ยท Last modified: 2013/11/06 20:17 by Inhumierer