Hope you are doing well? MyFPRO2 has been working flawlessly for a long time now and it is about time I built another one of your projects and is specifically interested in this one. May I ask why have you changed the mosfet from the arduino build to this one. I still have a bunch of the FQP30N06L in stock hence my question. Also, have you considered to combine the focuser (MIT) version with this dew controller? Would be nice to have a combination with minimal features from both projects. Maybe two channel dew controller with focuser.
Regards
Johan
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The use of an ESP32 at 3.3V means I need a MOSFET with a lower gate threshold in order to be fully ON at the lower voltage. Though the other mosfet is older, it works well interfacing at 3.3V
The FQ mosfet requires more gate voltage to turn fully on, which means that when interfaced at 3V3 it is not always fully ON and thus we do not get 12V across the dew strap.
Regards
Robert
Last edit: brownrb 2021-09-14
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reply
Also, have you considered to combine the focuser (MIT) version with this dew controller? Would be nice to have a combination with minimal features from both projects. Maybe two channel dew controller with focuser.
Answer
You only have one serial port. So serial is out completely.
Just thinking out loud...
For ESP32 maybe, depends how many pins 1 needs to use
For focuser, dir, step, enable, mso/ms1/ms2, temp probe = 7 pins
For dew controller, i2c for ambient/humidity/dewpoint, probe=2, output channels pwm=2
So minimum of 11 i/o pins. there are probably not 11 pins that can be used without interferring with esp32 functions. So this is the limiting factor. Cannot share probes because the probes need to be at different places on the scope(s). Would probably need to consider an 8 bit port expander like a PCF8574 to get the number of pins required.
The interface for the focuser would be web/indi/remote ascom alpaca
The interface for the dew controller would be web
Possible, but I really do not have the enthusiam to combine projects together,
Regards
Robert
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Thank you for your feedback Robert. I understand. On a side note. Your ESP32 daughter boards are very nice indeed. Recently ordered some new boards from JCBLPCB and their service was very good.
Again thank you for everything you do for our community
Regards
Johan
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Hi Johan
Yes, the daughter boards are great, and easy to implement other projects,
And the software is all there easy to modify and interface.
I have used a number of these for other projects that are not up there yet.
So many ideas, so little time.
regards
Robert
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hi Robert,
Hope you are doing well? MyFPRO2 has been working flawlessly for a long time now and it is about time I built another one of your projects and is specifically interested in this one. May I ask why have you changed the mosfet from the arduino build to this one. I still have a bunch of the FQP30N06L in stock hence my question. Also, have you considered to combine the focuser (MIT) version with this dew controller? Would be nice to have a combination with minimal features from both projects. Maybe two channel dew controller with focuser.
Regards
Johan
The use of an ESP32 at 3.3V means I need a MOSFET with a lower gate threshold in order to be fully ON at the lower voltage. Though the other mosfet is older, it works well interfacing at 3.3V
The FQ mosfet requires more gate voltage to turn fully on, which means that when interfaced at 3V3 it is not always fully ON and thus we do not get 12V across the dew strap.
Regards
Robert
Last edit: brownrb 2021-09-14
reply
Also, have you considered to combine the focuser (MIT) version with this dew controller? Would be nice to have a combination with minimal features from both projects. Maybe two channel dew controller with focuser.
Answer
You only have one serial port. So serial is out completely.
Just thinking out loud...
For ESP32 maybe, depends how many pins 1 needs to use
For focuser, dir, step, enable, mso/ms1/ms2, temp probe = 7 pins
For dew controller, i2c for ambient/humidity/dewpoint, probe=2, output channels pwm=2
So minimum of 11 i/o pins. there are probably not 11 pins that can be used without interferring with esp32 functions. So this is the limiting factor. Cannot share probes because the probes need to be at different places on the scope(s). Would probably need to consider an 8 bit port expander like a PCF8574 to get the number of pins required.
The interface for the focuser would be web/indi/remote ascom alpaca
The interface for the dew controller would be web
Possible, but I really do not have the enthusiam to combine projects together,
Regards
Robert
Thank you for your feedback Robert. I understand. On a side note. Your ESP32 daughter boards are very nice indeed. Recently ordered some new boards from JCBLPCB and their service was very good.
Again thank you for everything you do for our community
Regards
Johan
Hi Johan
Yes, the daughter boards are great, and easy to implement other projects,
And the software is all there easy to modify and interface.
I have used a number of these for other projects that are not up there yet.
So many ideas, so little time.
regards
Robert