Fatshark SharkByte TX5S.1 75mm 1S using Boost Regulator

By jason.gauruder on Aug 20, 2021

5  91  0

NBD Cockroach Brushless Extreme-Durable Frame 75mm
BetaFPV Canopy for EOS2
https://betafpv.com/products/canopy-for-eos2-camera
NBD Hummingbird Pro 1s AIO FC, BT2.0 connector
NBD 0802 18000kv (direct soldered)
NBD Azi Tri-blade 40mm
GND 450mah 1S w/ BetaFPV BT2.0
SB Whoop Board TX5S.1 w/ Dipole antenna
RunCam Shark Byte Nano Digital FPV Camera, w/ default length mipi cable
Pololu 2.5-9.5V Adjustable Boost Regulator
https://www.pololu.com/product/791

I set Boost Regular to approx 80-90% of its max setting (approx 8V volts) using the built in trimmer potentiometer
The Pot has physical "stops" as you turn clockwise (higher voltage to ~9.5V max) or counterclockwise (lower voltage to ~2.5V min). You can test various settings on the upper limits and you will see at what setting the VTX board powers up (but does not output video) and gradually increase until the red and blue lights come on the VTX. Do not make changes using the POT while power applied (not sure what will happen, but I tried to avoid doing so). I estimate for me it was about 80-90% of the total available physical clockwise movement that is allowed.
Soldered Vin and GND to FC input leads
Soldered Vout to TX5S.1 "V" (Voltage) pad
GND is shared/common from input GND ("negative" on FC input lead) and TX5S.1 "G" (ground) pad
No Capacitor used in this application.

TX5S.1 using FC UART2 TX/RX pads (per SB instructions TXRX and RXTX)
Set in betaflight that UART2 for MSP and baud 115200
Do not use SB latest "canvas" mode firmware - since NBD Hummingbird only runs their custom beta flight build @ v4.1.5 and cannot yet run 4.2.8 or later. I could not get any OSD to display until I reverted back to Rev 20022021 in the "archived Firmware" section :
https://fatshark.helpscoutdocs.com/article/171-shark-byte

The BetaFPV canopy is hacked up to provide better clearance around/over the TX5S.1
The camera sticks out several mm. Better options surely exist (or 3D print, thingiverse, etc), but this is what I had on hand
A very boring flight uploaded to youtube. but proof of 1S batt voltage used.
www.youtube.com/watch?v=XeTjHWWUnSg

I have a handful of backyard flights and a couple indoor. I do not know yet the long term longevity of either the boost regulator or running the TX5S.1 off of a boost regulator. I do know that there is loss (heat) in the conversion/boost process.

Outdoor flight example :
youtu.be/qcA4JDoA-O8

Photos

Discussion

Sign in to comment

Guides & Reviews

42 4,104  12
Jun 21, 2021

AirbladeUAV has done it again and this time they've brought long range to the 5" class! Based on the popular Transformer Mini, the new Transformer 5" Ultralight adopts a lot of the same design philosophies with larger props and more payload capacity. It can fly upwards of 20 minutes on a 4 cell Li-Ion battery pack and in ideal conditions it's got a range of over 4 to 5 miles. In this guide I'll walk..

Read more
51 7,559  44
Mar 04, 2021

With the release of the DJI FPV Drone cinematic FPV has become a lot more accessible, but you certainly don't want to crash a $750 drone! The QAV-CINE Freybott is a compact, lightweight cinematic FPV drone that can take a hit and keep going. It's a lot safer to fly indoors and around people. With a naked GoPro or the SMO 4k you can capture some great stabilized footage. In this guide I'll show you..

Read more