How to connect 110V DC to the GPIO of the Microcontroller with all EMI-EMC Protection.

Thread Starter

sgr

Joined Jun 27, 2017
26
How to connect 110V DC to the GPIO of the Microcontroller with all EMI-EMC Protection.
Please explain with the circuit schematic ASAP...
 

drjohsmith

Joined Dec 13, 2021
850
How to connect 110V DC to the GPIO of the Microcontroller with all EMI-EMC Protection.
Please explain with the circuit schematic ASAP...
can you expand on
" with all EMI-EMC Protection "

what is the application,
is it commercial or a home one off
which part of the world is it for
what is the micro you are looking at using ?
 

MaxHeadRoom

Joined Jul 18, 2013
28,513
Can you draw the circuit??
Do a search for Solid State relay, many examples out there.
You can get different input volage and various output types, AC DC etc.
You can roll your own, or :--

An example of the internals of an off the shelf (AC) version.

1639507854025.png
 

Ian0

Joined Aug 7, 2020
9,503
Is it a microprocessor eliminator? Connect 110V DC to the GPIO pin and the microprocessor is eliminated in a puff of smoke.

Is the 110V DC an INPUT voltage or do you wish to switch power at 110V DC?
If it is an input, then a simple voltage divider will do.
If you are switching power, does the 110V DC share a common negative supply with the microprocessor? If so, a MOSFET should do, probably driven by a MOSFET gate driver such as MCP1402, because logic level MOSFETs get pretty scarce for voltage ratings >100V.

A triac is not going to help much if it is DC!
 

MaxHeadRoom

Joined Jul 18, 2013
28,513
This is why I specified it was the AC version, and they come in AC or DC versions, it was not meant to be an example of a the device he actually needed.
 

Reloadron

Joined Jan 15, 2015
7,452
How to connect 110V DC to the GPIO of the Microcontroller with all EMI-EMC Protection.
Please explain with the circuit schematic ASAP...
If all you want to do is connect 110 VDC to a GPIO of a uC just use an optocoupler. You fail to mention what GPIO voltage you want? Could be 3.3 volts or 5.0 volts? A simple Google of GPIO optocoupler interface will bring up a dozen examples. Additionally adding ASAP is not going to make people jump. Please works much better. You can also explain better your objective. Do you want to use a GPIO to turn On/Off 110 VDC or use a GPIO to detect the presence of 110 VDC.

Ron
 
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