How to connect diy voltage divider to d4r2??
How to connect diy voltage divider to d4r2??
Hello!
I soldered a voltage divider like the one in the picture for a 2s lipo:
Can someone please tell me how it has to be connected to a d4r2? I have read a couple of times that I must not connect minus, some say it's ok. I'm a bit confused now. Should I connect ground only to the rx not to the battery, or connect gnd to the battery and not to the rx? Or is minus to be connected to both?
Where do I plug it into the rx? And what is the right setting on the dht-u?
Thanks
I soldered a voltage divider like the one in the picture for a 2s lipo:
Can someone please tell me how it has to be connected to a d4r2? I have read a couple of times that I must not connect minus, some say it's ok. I'm a bit confused now. Should I connect ground only to the rx not to the battery, or connect gnd to the battery and not to the rx? Or is minus to be connected to both?
Where do I plug it into the rx? And what is the right setting on the dht-u?
Thanks
- MikeB
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Re: How to connect diy voltage divider to d4r2??
This is how I connect a voltage divider:
viewtopic.php?f=95&t=4293&p=60766&hilit ... png#p60766.
C1 removes noise and the 1k0 R3 allows full connectivity while protecting from over current problems.
The reason it is suggested that the GND connection is not made is if your main negative connection between the battery and the ESC is not connected, for some reason, all the power current would flow through the receiver via the sensor GND connection.
Including the 1K0 resistor limits such a current and protects the receiver and wiring.
Mike.
viewtopic.php?f=95&t=4293&p=60766&hilit ... png#p60766.
C1 removes noise and the 1k0 R3 allows full connectivity while protecting from over current problems.
The reason it is suggested that the GND connection is not made is if your main negative connection between the battery and the ESC is not connected, for some reason, all the power current would flow through the receiver via the sensor GND connection.
Including the 1K0 resistor limits such a current and protects the receiver and wiring.
Mike.
erskyTx/er9x developer
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The impossible takes a little longer!
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Re: How to connect diy voltage divider to d4r2??
what about connecting the ground only at the battery side? If ground is broken no current would flow at all?
João
João
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Re: How to connect diy voltage divider to d4r2??
Thanks!
Since I have a different divider like the one Mike mentioned, I would only connect ground to the battery, as jhsa recommends.
Which plug do I use on the D4r2? What setting on the Dht-u has to be used?
Thanks
Since I have a different divider like the one Mike mentioned, I would only connect ground to the battery, as jhsa recommends.
Which plug do I use on the D4r2? What setting on the Dht-u has to be used?
Thanks
Re: How to connect diy voltage divider to d4r2??
I wasn't recommending I was asking..
João
João
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Re: How to connect diy voltage divider to d4r2??
Makes me even more confused... [emoji13]
Re: How to connect diy voltage divider to d4r2??
Do as suggested by Mike.
João
João
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Re: How to connect diy voltage divider to d4r2??
Today i found the time to try it out.
I hooked up everything, connected gnd from the rx sideport to minus of the divider, adin from the sideport to the divider and the divider to battery plus. Battery gnd wasnt connected.
The positive thing first: there was no smoke!
But I only get the readings from a1 which is the voltage that comes from the bec. No readings from a2.
Can somebody please help me find the problem?
Thanks
I hooked up everything, connected gnd from the rx sideport to minus of the divider, adin from the sideport to the divider and the divider to battery plus. Battery gnd wasnt connected.
The positive thing first: there was no smoke!
But I only get the readings from a1 which is the voltage that comes from the bec. No readings from a2.
Can somebody please help me find the problem?
Thanks
- MikeB
- 9x Developer
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Re: How to connect diy voltage divider to d4r2??
First question is:
Have you set the range of A2 in the telemetry setup menu?
Mike.
Have you set the range of A2 in the telemetry setup menu?
Mike.
erskyTx/er9x developer
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Re: How to connect diy voltage divider to d4r2??
Eehh, no. What would be the right setting for a 2s lipo?
- MikeB
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Re: How to connect diy voltage divider to d4r2??
It depends on the voltage divider, not the lipo.
If you use the 2S input on the diagram you posted, then you are using a 4:1 divider.
The input to the Rx is a maximum of 3.3V, so the input to the divider is a maximum of 4 times this = 13.2V.
So 13.2V is the value you enter for the A2 range.
Mike.
If you use the 2S input on the diagram you posted, then you are using a 4:1 divider.
The input to the Rx is a maximum of 3.3V, so the input to the divider is a maximum of 4 times this = 13.2V.
So 13.2V is the value you enter for the A2 range.
Mike.
erskyTx/er9x developer
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The impossible takes a little longer!
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Re: How to connect diy voltage divider to d4r2??
And confirm the voltage reading is correct with a voltmeter..
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Re: How to connect diy voltage divider to d4r2??
To get the ratio Mike posted: (1.5+4.5)/1.5=4
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Re: How to connect diy voltage divider to d4r2??
It works, thanks!