My favourite FC – the CLRacing F7 has been upgraded to V2. In addition to the improvements they also released two versions, DUAL Gyro and MPU6000! Everyone’s happy!
Where to Buy CLRacing F7 V2?
Dual Gyro Version ($35)
MPU Single Gyro Version ($35)
Two Versions – Dual Gyro & MPU
Both versions have nearly identical layout which is similar to the original CLRacing F7. Honestly, I think the CLRacing flight controllers probably have one of the simplest, cleanest and most practical layouts.
The only difference between the two versions is the gyro sensors. The MPU version has one single MPU6000 gyro on the FC, while the Dual Gyro version has two ICM20602 gyros.
Dual Gyro – Hype or Real Deal?
It’s not only “having two gyros on FC”, but it’s actually “using two gyros simultaneously”. Some flight controller have two gyros, but you can only choose one, the other is just a backup.
The dual gyro’s in the CLRacing F7 V2 can work at the same time, it reduces noise by averaging data from the two gyros.
The two identical gyro’s (ICM20602) are mounted at 90° apart from each other, i.e. Gyro #1’s X axis is parallel to Gyro #2’s Y axis. However it won’t help the vertical Z axis as both gyros are mounted on the same horizontal plane.
In theory, it should make a difference, but whether the difference is big enough to be worthwhile for the average quad, has yet to be backed by data.
There is concern if one of the gyro’s might be below spec than the other, it could actually result in more noise when data are averaged than simply using a single “better” gyro.
If you don’t believe in it, you can instead get the good old trusted MPU6000 version (single gyro) and save $4 :)
The Dual Gyro didn’t support RPM filter when it first came out, but support has been added since Betaflight 4.1.
Specs and Features
- STM32 F7 MCU
- IMU (Gyro):
- Dual Gyro: 2x ICM20602
- MPU: 1x MPU6000
- Betaflight OSD
- Input voltage 2S – 8S (36V)
- Built-in BEC: 5V/3A and 3.3V/250mA
- 6 Full UART’s
- “True PitMode”
- Supports FPV Camera Control (with necessary resistor and capacitor)
- VBAT Polarity protection
- Built-in 32MB flash memory chip for Blackbox
- 4 Motor Outputs
- Target: CLRACINGF7, loaded with BF4.0.2
The CLRacing F7 V2 FC includes the following accessories:
- 6x rubber grommets for soft mounting (2 spare)
- FC to 4in1 ESC ribbon cable (8-pin)
- a couple of spare header (9-pin and 8-pin)
PitMode on the CLRacing F7 allows you to power on and off your VTX by simply flipping a switch on your transmitter. It basically controls the power to the VTX, so it would work regardless the VTX you have, even the old ones.
There are times you want to power up your quad but keeping the VTX off, like in a race, configuring your quad on the bench, or when you are crashed. This avoids interfering with other pilots and VTX overheat.
CLRacing first implemented this feature in their original F7 FC, and I absolutely loved it! Though there was a little problem with the original as the 5V 1.5A BEC wasn’t strong enough to turn on certain VTX after they are switched off with PitMode. They rectified the issue in the V2 by upgrading the 5V BEC to 3A.
Check manual for details on how to set this up. But if you don’t want to use it, you can simply bridge the “ON” jumper pads. You don’t get this jumper in the MPU version, so you simply have to enable/disable PitMode in the Modes tab.
The CLRacing F7 V2 has the second biggest flash chip in all the Betaflight flight controllers, only losing to the 128MB of its predecessor.
But that’s all you need honestly, logging at 2kHz , 32MB is enough for over five minutes of blackbox recording.
The manual explains how to setup a lot of things, and how to connect components to the board: https://cdn.shopify.com/s/files/1/1737/4233/files/CLF7V2.pdf
Pad names meaning:
- VBAT = Power to FC and Voltage monitoring
- CAM+ = Power to Camera, 5V or VBAT (decide by solder bridge)
- CAM- = Ground
- CAMC = Camera Control
- CAMS = Camera Signal
- VTXS = VTX Signal
- VTX+ = Power to VTX, 5V or VBAT (decide by solder bridge)
- VTX- = Ground
- BB = Buzzer
- PIT = PitMode (VTX Power Controllable From Radio, requires Betaflight Setup)
- ON = VTX Power Constantly on (No setup)
You have to use the header connector (4in1 ESC Port) for ESC’s, even when you are not using a 4in1 ESC. The pins are not broken out to solder pads. Here are the pin out of the connector.
ESC telemetry is on UART 4.
There is no RSSI pad. Current sensor input is only available in the 4in1 ESC connector.
If you want to run RPM filter, you have to disable LED strip, and solder your motor 4 signal to the LED pad. See manual for full instruction.
Voltage meter seems to be reading low by default. I have to increase voltage meter scale to about 156. Anyway test yours with a multimeter to make sure and adjust scale accordingly.
Motor 4 Not Moving?
On your first power up, motor 4 is not spinning? You must have forgot to bridge one of the solder jumpers – look for “LED / M4”. See manual for what this means.
This FC is going into my next 6S build.