myfivezees
New User
Does anyone know if this sensor will work with a Lithium Ion battery that does not have a balance lead. It would have to be connected via a JR style connector. I am using a Fromeco 5200 mAh ReLion battery.
Aloft Forums
Welcome to Aloft Forums. Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
FrSky SP-FLVS - Smart Port Lipo Voltage Sensor
- Thread starter myfivezees
- Start date
Think you will want to use the FBVS:
alofthobbies.com
FrSky Battery Voltage Sensor (FBVS-01) - (No wires)
The FrSKY Battery Voltage Sensor is used with the FrSKY sensor hub and telemetry system.
alofthobbies.com
myfivezees
New User
Thanks for the reply Wayne. Can I use the FBVS-01 with a RX8R receiver ? Presently my X10S shows me the voltage at the receiver which is 5 volts regulated by a Smart Fly Competition 12 but I would like to be able to see the actual voltage of my batteries before being regulated by the Smart Fly.
I am using 2-Fromeco 5200 MAH Lithium Ion Batteries connected to the Smart Fly Competition 12.
I am using 2-Fromeco 5200 MAH Lithium Ion Batteries connected to the Smart Fly Competition 12.
myfivezees
New User
They are Fromeco 5200 mah Lithium Ion packs. 7.4 volts each.
myfivezees
New User
Flying Dutchman
Strong User
The voltage of the Lithium Ion battery is higher, but this looks basically like a 1s setup. If so, a sensor with that capability should work.
The MLVSS has a 1s input, even though the specs say 2s-6s (as does the FLVS). You'll probably still need a simple FBVS voltage divider to get the voltage down to something the sensor can handle, but from that point you should be able to adjust the calibration ratio in the Rx to where you want it.
The MLVSS has a 1s input, even though the specs say 2s-6s (as does the FLVS). You'll probably still need a simple FBVS voltage divider to get the voltage down to something the sensor can handle, but from that point you should be able to adjust the calibration ratio in the Rx to where you want it.
The FLVS sensor is simply a voltage divider. This converts the flight pack voltage down to 0 to 3.3 volts which the receiver can deal with. So either purchase a FLVS or make your own voltage divider using 2 quarter watt resistors. See the attached diagram. This circuit will allow up to 10S battery pack. The RX8R and X8R receiver do not have an A2 input port so these receivers are not suitable. The RX6R, GRX8, the Archer GR6/8 require the voltage divider, the Archer R8-pro can be used without a voltage divider. The Ain2 port is an analog input port. Once you have this working you will need to adjust the A2 voltage in the A2 telemery page using the ratio perimeter so the displayed voltage equals the measured pack voltage. Precision is .1 volts.
Attachments
Flying Dutchman
Strong User
Kilrah
Very Strong User
No, but the FBVS is.
Flying Dutchman
Strong User
I know that he only has a power plug, but I would make a parallel connection from the power plug to the MLVSS. Unless that would create ground loop issues. But since this would require an FBVS (or your divider circuit) anyway, there would already be some separation.
Flying Dutchman
Strong User
How is that 2s? The Fromeco has only a JR plug (2-lead), i.e. 1s. See here: https://fromeco-scale-avionics-llc.myshopify.com/products/relion-5200-ma-h
So why not connect the battery to the FBVS, and FBVS to the 1s input of the MLVSS. The MLVSS just sees a voltage over the Gnd and 1s pins, and won't know whether it's looking at a Fromeco, LiPo, or NiMH.
Yes I understand but the pack voltage is 7.4 volts. And no balance lead so the MLVSS wont work.
