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« on: October 07, 2020, 04:46:38 PM »
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Has anyone tried pluggin in the below voltage sensor to FrSky X8R Telemetry port.

https://robu.in/product/voltage-sensor-module/
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« Reply #1 on: October 07, 2020, 05:40:16 PM »
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Try it out and please let us know  Grin

If it works it would be fantastic!
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« Reply #2 on: October 08, 2020, 12:29:06 PM »
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@ Sanjayji.. Guess it should work. Found this
https://www.flitetest.com/articles/build-a-frsky-telemetry-voltage-sensor

Will try it and post it here.
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« Reply #3 on: October 08, 2020, 03:14:28 PM »
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Hi,

That module will definitely work, here is a reference circuit. Later try the current sensor module too.

https://openrcforums.com/forum/viewtopic.php?t=3767

https://in.pinterest.com/pin/293508100696710212/?nic_v2=1akqBamcp

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« Reply #4 on: October 08, 2020, 03:59:29 PM »
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Great!

Waiting for the results
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« Reply #5 on: October 08, 2020, 06:27:32 PM »
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Hi,

That module will definitely work, here is a reference circuit. Later try the current sensor module too.

https://openrcforums.com/forum/viewtopic.php?t=3767

https://in.pinterest.com/pin/293508100696710212/?nic_v2=1akqBamcp



Thanks will try this
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« Reply #6 on: May 05, 2022, 10:53:21 AM »
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Were you able to try this out?

Looks like this will work with receivers having A2 inputs.
You will need to connect the input to +/- of Balance port of your LiPo, and then only connect the Signal to your Receiver A2 pin (don't connect the ground).
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« Reply #7 on: May 05, 2022, 07:51:25 PM »
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One thing we need to keep in mind ... we re putting a very fragile electronics between the receiver and direct connection to battery. My voltage sensor fried and ate up my frsky receiver two times along with other costly electronics before I realised whats happening.
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« Reply #8 on: May 05, 2022, 08:13:18 PM »
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What is required is some sort of voltage clamp circuit so that excess voltage does not reach the RX
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« Reply #9 on: May 05, 2022, 08:23:02 PM »
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We are mainly into fixed wing. Every gram counts.  Bang Head
Great 👍 idea anyway if we can spare some extra weight penalty.
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« Reply #10 on: May 06, 2022, 09:12:42 AM »
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One thing we need to keep in mind ... we re putting a very fragile electronics between the receiver and direct connection to battery. My voltage sensor fried and ate up my frsky receiver two times along with other costly electronics before I realised whats happening.

Hi Shirsa, can you help me by describing the reason why the RX got fried?

I am trying to make a voltage divider myself for 3S Lipo ( using 4:1 ratio quarter Watt Resistor combination 40kOhm & 10 kOhm ) for my G-RX8 receiver. So, I want to learn from your experience and not repeat the same.

One thing I learned from reading other's experience is not to create a ground loop by connecting the Ground into the Rx (Only. the signal goes to A1/A2 pin on Rx).
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« Reply #11 on: May 06, 2022, 09:36:25 AM »
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Were you able to try this out?

Looks like this will work with receivers having A2 inputs.
You will need to connect the input to +/- of Balance port of your LiPo, and then only connect the Signal to your Receiver A2 pin (don't connect the ground).

I did try this, and it did not work. I am not great at electronics, but it will be interesting if someone can help getting this sensor to work.
I love the idea of having the battery voltage on the TX and the readily available voltage sensors are expensive.
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« Reply #12 on: May 06, 2022, 10:32:12 AM »
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Were you able to try this out?

Looks like this will work with receivers having A2 inputs.
You will need to connect the input to +/- of Balance port of your LiPo, and then only connect the Signal to your Receiver A2 pin (don't connect the ground).

I did try this, and it did not work. I am not great at electronics, but it will be interesting if someone can help getting this sensor to work.
I love the idea of having the battery voltage on the TX and the readily available voltage sensors are expensive.

Hi, did u connect the 25v input of the Voltage Sensor to the Lipo Balance Port + and - pin.?
Also, from the Voltage Sensor output, you need to connect only the Signal pin (sensor pin) to the A1 or A2 pin on Rx (receiver). You need not connect the Ground Pin on the Voltage Sensor Output to Rx Ground (this is to avoid ground loop).
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« Reply #13 on: May 07, 2022, 06:39:04 PM »
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What is the maximum voltage you guys are looking at ?
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« Reply #14 on: May 09, 2022, 12:11:00 PM »
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What is the maximum voltage you guys are looking at ?

I am looking at 12.6 (3S Lipo for now)
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« Reply #15 on: May 10, 2022, 07:11:23 PM »
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"Hi Shirsa, can you help me by describing the reason why the RX got fried?

I am trying to make a voltage divider myself for 3S Lipo ( using 4:1 ratio quarter Watt Resistor combination 40kOhm & 10 kOhm ) for my G-RX8 receiver. So, I want to learn from your experience and not repeat the same.

One thing I learned from reading other's experience is not to create a ground loop by connecting the Ground into the Rx (Only. the signal goes to A1/A2 pin on Rx)."

--------------------

Simple... the lipo sensor got short on a hard landing. It poured the entire 12 volts in to the receiver. The receiver fried instantly and poured the voltage to the gyro. The gyro any way prevented the catastrophe and didn't pass the voltage to the servos but died.
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