Electronics design consultancy on a wireless 240VAC triac switch
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Description
Experience Level: Expert
Design details: We need some help designing a wireless lighting (or other non-reactive load) controller.
We need to measure:-
AC voltage and waveform (for power consumption, zero cross detection & power factor measurement).
AC current to measure (in conjunction with AC waveform) power consumption.
We need to switch the AC with a triac, so we can do light dimming and to avoid EMC issues.
We need to provide 3.3vdc@1a for the digital side (without using a trafo), but using a precision regulator so the supply can be used as a voltage reference for the ADC on the uC...
This will be in a sealed box, so opto-isolation not (necessarily) needed, but will be considered.
Already fixed is using a MK20DX256 uC and RFM95 LoRa radio module... as this is already in use in other products.
Schematic capture preferably to be done in Eagle.
Assistance routing the board, at least on the mains side needed.
Ideas for the visual style: N/A
Extra notes:
We need to measure:-
AC voltage and waveform (for power consumption, zero cross detection & power factor measurement).
AC current to measure (in conjunction with AC waveform) power consumption.
We need to switch the AC with a triac, so we can do light dimming and to avoid EMC issues.
We need to provide 3.3vdc@1a for the digital side (without using a trafo), but using a precision regulator so the supply can be used as a voltage reference for the ADC on the uC...
This will be in a sealed box, so opto-isolation not (necessarily) needed, but will be considered.
Already fixed is using a MK20DX256 uC and RFM95 LoRa radio module... as this is already in use in other products.
Schematic capture preferably to be done in Eagle.
Assistance routing the board, at least on the mains side needed.
Ideas for the visual style: N/A
Extra notes:
Ben S.
98% (20)Projects Completed
14
Freelancers worked with
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Projects awarded
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Last project
7 Feb 2021
United Kingdom
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Hi Ben, I see you've flagged this as urgent (a red flag for me). I've done energy monitoring projects before (last year) and much depends on your budget and timescales. Can you message me on these two points?
Ben S.06 Feb 2017So it's not that urgent, more about getting it right!
Budget, I'm looking for an idea... we can do everything (inc. PCB schematic and layout) once I've got scaled analog and digital lines... i.e. all the uC / radio side.
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