Emlid M2 how to activate the timemark with a button

[antezanaidel (Idel Abner Antezana Izquierdo)]

I am trying to activate the timemark with a manual button, what would be the correct connection to activate it without using the camera adapter?

[victor.ferreira]

Hi @antezanaidel,

We Have a special hot shoe adapter for activating the event pin on the M2, which has been fully tested for compatibility with the M2.

Could you share a bit more about your workflow? With a few more details, I might be able to suggest an alternative that’s a better fit for your setup and needs. This way, we can find the best configuration of the scheme with the M2.

[antezanaidel (Idel Abner Antezana Izquierdo)]

I am looking for the correct way to connect to the Sony ILX-LR1 camera which does not have a hot shoe accessory but does have an exposure output, for which I need to know what is the correct way to connect said output either by a button or a transistor, but I need to know the polarity so as not to damage my reach M2 module

[victor.ferreira]

We haven’t tested the integration with the Sony ILX-LR1 with M2 so is hard to suggest the best setup configuration.

This camera doesn’t have a hotshoe. However, one of our users successfully achieved this integration by using a 20k pull-up resistor and replacing the mechanical shutter with an electronic one.

You’ll need to connect the ground pins of the C1 port and the camera, and the M2 event pin from the C1 port to the camera’s shutter signal pin with the custom cable. If there’s enough voltage above the 3.3V logic level, the pin will read the signal and a time mark will be recorded.

[antezanaidel (Idel Abner Antezana Izquierdo)]

So to generate a time mark it works this way, every time it is at rest it is connected to ground, and every time I want to register an event in the time mark, the button is pressed and a positive 5V signal is recorded and then returns to ground, Is this how registration works? as shown in the picture.

[antezanaidel (Idel Abner Antezana Izquierdo)]

[antezanaidel (Idel Abner Antezana Izquierdo)]

or in any case what is the type of signal that registers the rise or fall event

[antezanaidel (Idel Abner Antezana Izquierdo)]

Shorting C1 Ground and timemark pins using led light

Hi! Thanks for pointing out the 3.3V maximum voltage! That save me from frying my M2. If I want to see how the time mark works I can just follow the general illustration I made below, make sure satellites are properly communicating with the M2 and I should see the dip in signal in reachview, right? As you pointed out maximum of 3.3v, what could be the least voltage that will trigger the time mark? Thanks. [image]

[victor.ferreira]

As long as your M2 has a clear view of the sky and is receiving good satellite signals, the time mark should register correctly in Emlid Flow when triggered by a voltage dip.

The mark pin will generally operate reliably from a trigger of about 1.4 V, since the input circuitry will see that as a “low.” However, to be on the safe side, a minimum of about 2 V is often recommended to guarantee reliable operation. Anything above this will reliably register, and it’s good to stay below the maximum 3.3 V to prevent any risk to the M2.