RalphTrimble
TVWBB Diamond Member
One of the actual electronic differences between the HMv4.0 and HMv4.1 boards is the way the blower is regulated. HMv4.0 pulses the ground to regulate speed, HM4.1 pulses the 12v side instead, which simplifies wiring cause the servo and blower can now share a ground.
This, however, makes the wiring for the add-in CAT5 jack on HMv4.0 different than the HMv4.1 and also limits the number of probes that can be connected to two instead of three.
I am wondering (Bryan) if you think it would be possible to modify the blower driver circuit on a HMv4.0 board and change the MOSFET to the type used on HMv4.1 so the CAT5 wiring on a HMv4.0 board (and blower operation) can match the standard HMv4.1 pinout?
This, however, makes the wiring for the add-in CAT5 jack on HMv4.0 different than the HMv4.1 and also limits the number of probes that can be connected to two instead of three.
I am wondering (Bryan) if you think it would be possible to modify the blower driver circuit on a HMv4.0 board and change the MOSFET to the type used on HMv4.1 so the CAT5 wiring on a HMv4.0 board (and blower operation) can match the standard HMv4.1 pinout?