Re: Extern styrning av Hendi 3500W (manuell) induktionshäll
Postat: tisdag 2016-06-28 23:14
Hi bryggapa
Respect is the key word: meaning I will proceed with caution, having fully informed myself of the options and dangers. As I work in IT, I do things everyday that I have never done before, and did not understand only a few hours ago!
I agree that separation of the control electronics and the high voltage / current main board is vital, and the optocouplers discussed in this thread seem a good way to do so (and are a big reason for me talking to you guys).
The "servo to turn the knob" was a solution that I hit on early: e.g. http://rapidcitizen.com/arduino_remote_stereo_volume_control.html. While it may be a little bit Heath Robinson, it would be both totally non invasive and isolated from the dangerous stuff.
The various options I am considering, in no special order are:
a) Control the rotary encoder mechanically by a servo, allowing the power to be varied during mashing. Non invasive.
b) Emulate the rotary encoder, allowing the power to be varied during mashing. Invasive, and a not-proven solution, but should be possible.
c) Replace the current control pcb with the pcb from sister models with digital plus minus buttons, and hack with the solution in the german forum. Invasive, and the control pcb from sister model may not work with the microcontroller on my main board.
d) Buy a manual Hendi, and control it by turning the power on and off externally via SSR: This solution is non invasive, but only allows on / off of power, rather than plus / minus
e) Buy a manual Hendi, and control the power via custom control pcb (with Optocouplers), as developed in this thread. Invasive, but a proven solution (almost "off-the-shelf").
At the moment, e) seems the most elegant solution. d), which I initial rejected has a simplicity which is growing on me. a) is the wild-card solution.
skål
Chris
Respect is the key word: meaning I will proceed with caution, having fully informed myself of the options and dangers. As I work in IT, I do things everyday that I have never done before, and did not understand only a few hours ago!
I agree that separation of the control electronics and the high voltage / current main board is vital, and the optocouplers discussed in this thread seem a good way to do so (and are a big reason for me talking to you guys).
The "servo to turn the knob" was a solution that I hit on early: e.g. http://rapidcitizen.com/arduino_remote_stereo_volume_control.html. While it may be a little bit Heath Robinson, it would be both totally non invasive and isolated from the dangerous stuff.
The various options I am considering, in no special order are:
a) Control the rotary encoder mechanically by a servo, allowing the power to be varied during mashing. Non invasive.
b) Emulate the rotary encoder, allowing the power to be varied during mashing. Invasive, and a not-proven solution, but should be possible.
c) Replace the current control pcb with the pcb from sister models with digital plus minus buttons, and hack with the solution in the german forum. Invasive, and the control pcb from sister model may not work with the microcontroller on my main board.
d) Buy a manual Hendi, and control it by turning the power on and off externally via SSR: This solution is non invasive, but only allows on / off of power, rather than plus / minus
e) Buy a manual Hendi, and control the power via custom control pcb (with Optocouplers), as developed in this thread. Invasive, but a proven solution (almost "off-the-shelf").
At the moment, e) seems the most elegant solution. d), which I initial rejected has a simplicity which is growing on me. a) is the wild-card solution.
skål
Chris