Radically extend your flight time and improve your video reliability on 1S builds with this 5V voltage booster
One of the major challenges with digital or longer-range 1S builds is supplying enough power to the video transmitter, along the whole discharge curve of the battery.
In most cases, Li-po batteries can be discharged down to 3.5 or even 3.3v.
That is already edging the limit of the HDZero Whoop Lite VTX (which tends to completely brownout below 2.8V and will not restart unless power-cycled). But even more so on Li-ion builds whose batteries can be discharged down to 2.5v – All while showing higher voltage sag under load, which can turn off your video under the slightest punchout past mid-battery capacity.
Fractal Engineering selected the best-suited power IC for their specific 1S need and found this outstanding chip, boasting impressive specs that fit exactly the use case. They then designed the circuit around it from the most reputable component manufacturers, and out came this remarkably capable piece of gear that can definitely be trusted to supply consistent, reliable power all the way through 1S batteries.
Successor of the Boostyboi, the Boostybaby retains all of the performance in a now much smaller footprint, less than half the size and weight, at not even 0.4g! This makes it a viable option to add reliable video to any 1S digital or high power video build, from nano long range to tiny whoops.
It also retains the remote disable pad added in the BB Rev-02, allowing you to switch off the output from the FC when pulled to ground. That will allow you to turn off the connected VTX remotely, from your radio, whether be it to save battery, cool it down or simply reboot it in the event it got wonky.
Why do you need one:
It will boost its input voltage from as low as 1.8v to 5V, 2.1A.
It will power your HDZero Whoop lite or Walksnail VTX all the way down to 2.5V and below, even at full output power.
How to setup /enable:
Quicksilver:
From the configurator, save the target
Choose an available pad you want to use on your FC and find it on the target file (buzzer recommended, but most would do)
Note the pin used by that function and remap it to a new one called “fpv“
Back in the configurator, upload your edited target and in the receiver tab, select the channel you want to assign to “AUX_FPV_SWITCH“
And you’re done! test by flipping the channel to make sure it’s commutating the booster on/off and you’re good to go.
Betaflight:
In CLI, type
resource
Find the pad you want to use (can be a uart, led, buzzer, pinio pad…)
For instance if we want to use the buzzer then we can find it is assigned to resource C13
resource BEEPER 1 C13
Keep note of that resource ID.
Next we will free up that pad by assigning it to resource NONE
resource BEEPER 1 NONE
Next we can set the custom mode switch, using these commands:
set pinio_box = 40,41,42,43
aux 2 40 2 1600 2100 0
Then we can finally assign our earlier resource ID to the custom more switch, like so:
resource PINIO 1 C13
That’s it for the CLI part! don’t forget to enter SAVE in CLI and let your FC reboot
Finally you can go to the Modes tab and assign an aux to the USER1 mode.
And you’re all set! You should be able to flip the boostyboi on/off with the flick of your switch.
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Advice
Learn about voltage regulation: Supplying your electrical components with the correct voltage is crucial for their operation. LiPo battery cells are rated at 3.7 volts per cell, therefore a range of voltages are available, leading from 3.7v (1S) to 44.4v (12S). A 3 cell 11.1v pack is widely employed as it provides a handy voltage for many electronics without the need to regulate. However, more powerful multirotors require LiPos with greater voltages; 6S (22.2v) is common for octocopters, thus voltage regulation is necessary to supply power to auxiliary components, such as the: receiver, flight controller, camera, transmitter and lights etc.
There are two types of regulators, linear and switching. A linear regulator works by taking the difference between the input and output voltages, and just burning it up as waste heat. The larger the difference between the input and output voltage, the more heat produced. This is the reason why linear regulators are usually only compatible with up to 3S LiPos. Linear regulators typically operate with efficiencies of 40%, reaching as low as 14%. On the other hand, switching regulators are far more efficient. They work by storing pulses of energy taken from the battery in a capacitor and then releasing it. This is accomplished with the help of an electrical switch and a controller, which regulates the rate at which energy is transferred to the output (hence the term “switching regulator”). The energy losses involved in moving chunks of energy around in this way are relatively small, and the result is that a switching regulator can typically have 85% efficiency. Since their efficiency is less dependent on input voltage, they are compatible with higher voltage LiPos. While they are preferable to linear regulators you should consider their placement within the UAV carefully, as in some cases the switching noise can cause interference with the receiver.
Within a multirotor context, the term “BEC” (Battery Eliminator Circuit) is exchangeable with voltage regulator. The use of a BEC negates the traditional need for a separate battery to power you flight auxiliaries, for example a receiver. Most speed controllers (Not OPTO ESCs) incorporate an internal 5v linear BEC, so that simply plugging the ESC into the receiver is all you need to supply power to it. However, as mentioned above they only work well under low loads and at low voltages. For higher voltage/current applications it is recommended to use a stand-alone SBEC – that way you reduce the risk of a brownout (a term used to describe the temporary loss of function of the radio receiver due to the supply voltage dropping too low). Confusion often surrounds the difference between a UBEC and an SBEC, however they are both the same thing – a switching voltage regulator. “UBEC” was once a specific brand name for one of the original switching BECs, so the more correct generic term is actually SBEC.
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Shipping
SHIPPING & DELIVERY
We are based in the UK, but ship to most worldwide destinations. Postage rates are calculated by the size/weight and shipment location. We process orders Monday to Friday and pride ourselves on our quick turnaround of orders - most UK orders will arrive the next day.
We are partnered with several delivery companies including Royal Mail, DHL, UPS and Parcel Force. If you have a special delivery requirement or would like to arrange a shop collection please contact us.
A confirmation email will be sent when your order has been dispatched. If you wish to change your order, please contact us promptly, as we won't be able to make amendments once the order has been shipped.
Order before 4PM for same day dispatch with Royal Mail, 2PM for next day delivery with DHL and 1PM for next day delivery with APC.
We offer FREE Shipping on UK orders over £99, weighing less than 1kg.
The courier options deliver Monday to Friday, Royal Mail delivers to residential addresses on Monday to Saturday.
For small low value orders our cheapest delivery service is Royal Mail First Class. For a guaranteed next day delivery we recommend Royal Mail Special Delivery or one of our courier delivery options.
International Postage
Order before 4PM for same day dispatch with Royal Mail.
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DHL Express offers NEXT DAY delivery to most European destinations and a very fast delivery for countries further afield, generally 2-3 days.
Orders shipped outside the EU may be subject to customs charges. These charges are additional to any delivery costs and will need to be paid by the recipient.
How to setup /enable:
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