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Mini-HowTo How to build a very cheap FrSKY Receiver D4R-II telemetry voltage divider 3S/4S



Use your Taranis X9D to have a Voltage Voice Message when you flight FPV



How to build a very cheap FrSKY Receiver D4R-II, D8R-II telemetry voltage divider 3S/4S sensor (2 min 17 sec)



What you need:



FrSKY Taranis X9D or Turnigy ER-9X with Telemetry Mod FrSKY DHT Module

FrSKY Receiver D4R-II or D8R-II with telemetry function

FrSKY telemetry cable - included

Shrink tube 6 mm and 3 mm

Resistor 1k Ohm, resistor 10k Ohm

Iron and solder

Voltmeter



Step 1 – Prepare The telemetry Cable

Remove all wires from the telemetry cable except for the white wire

The white wire will be connected to the receivers AD2 input

Use a knife to pull up the wire locks on the connector



Step 2 – Solder Resistors

Use a Helping Hand and solder the resistors shorten and bend together

Solder a red + wire to the 10k Ohm resistor brown, black, orange end

Solder a black - wire to the 1k Ohm resistor brown, black, red end

Solder white wire in the middle between resistors



Step 3 – Shrink Tube

Use small shrink tube pieces for each wire/resistor

Use a large shrink tube for the complete wire/resistor pack



Step 4 – Measure Telemetry Voltage

ATTENTION MEASURE WITHOUT RECEIVER CONNECTED

Connect battery with your telemetry cable red + and black - wire

Connect your Voltmeter red pin with the white wire and black pin with battery -

You should measure something between 1 Volt – 2 Volt, if you measure your battery voltage then your wire/resistor connection is reversed



Step 5 – Setup your Receiver RX

Connect your white wire connector with your receiver

Connect your receiver with your Flight Control or ESC 5 Volt source

Connect battery with your telemetry cable red + and black - wire



Step 6 – Setup your Transceiver TX

In Telemetry Menu setup A1 Voltage Divider Receiver 5 Volt – Range 13.2v

Setup A2 Voltage Divider 3S/4S Battery – Range 36.6v

Voltage for A2 Channel should now nearly the same like your battery voltage

Setup your Warnings for example 10.7v and 10.1v This video explains how to build a voltage sensor (voltage divider) for your FrSKY Telemtry Receiver for less than 0,25 $ for your Quadcopter, Plane ... or any other RC Gear.Use your Taranis X9D to have a Voltage Voice Message when you flight FPVWhat you need:FrSKY Taranis X9D or Turnigy ER-9X with Telemetry Mod FrSKY DHT ModuleFrSKY Receiver D4R-II or D8R-II with telemetry functionFrSKY telemetry cable - includedShrink tube 6 mm and 3 mmResistor 1k Ohm, resistor 10k OhmIron and solderVoltmeterStep 1 – Prepare The telemetry CableRemove all wires from the telemetry cable except for the white wireThe white wire will be connected to the receivers AD2 inputUse a knife to pull up the wire locks on the connectorStep 2 – Solder ResistorsUse a Helping Hand and solder the resistors shorten and bend togetherSolder a red + wire to the 10k Ohm resistor brown, black, orange endSolder a black - wire to the 1k Ohm resistor brown, black, red endSolder white wire in the middle between resistorsStep 3 – Shrink TubeUse small shrink tube pieces for each wire/resistorUse a large shrink tube for the complete wire/resistor packStep 4 – Measure Telemetry VoltageATTENTION MEASURE WITHOUT RECEIVER CONNECTEDConnect battery with your telemetry cable red + and black - wireConnect your Voltmeter red pin with the white wire and black pin with battery -You should measure something between 1 Volt – 2 Volt, if you measure your battery voltage then your wire/resistor connection is reversedStep 5 – Setup your Receiver RXConnect your white wire connector with your receiverConnect your receiver with your Flight Control or ESC 5 Volt sourceConnect battery with your telemetry cable red + and black - wireStep 6 – Setup your Transceiver TXIn Telemetry Menu setup A1 Voltage Divider Receiver 5 Volt – Range 13.2vSetup A2 Voltage Divider 3S/4S Battery – Range 36.6vVoltage for A2 Channel should now nearly the same like your battery voltageSetup your Warnings for example 10.7v and 10.1v