10

Running a receiver without an antenna should not cause any damage to the receiver, as no RF power is sent to the antenna (if your receiver has an active antenna there may be a DC bias present, but this does not cause problems - you will often see this in GPS receivers.) However, for completeness, it is worth noting that some modern RC receivers actually do ...


7

There are different ways, but a common one is to put a light bulb in series with the positive battery lead. This works because it will allow low currents through to power the flight controller, but if there is a surge in current from a short the bulb will light up and sap away the energy. You need to make sure you have a light bulb rated for the voltage ...


6

The main things you need are a motor, battery, electronic speed controller (ESC) and servos. The ESC sits between the battery and motor, and it also has a thinner cable that goes to the receiver. The wires from ESCs are often labelled, but if not, there will be two big wires on one end that are the input from the battery (red for positive, black for negative)...


5

Is the shunt resistor usually mounted high-side (i.e. at the positive battery terminal), or low-side (at the negative terminal), and why? Does it matter? There should be no significant difference to the measurement if the shunt resistor is on the high or low side. As the resistor is in series the absolute voltage across, and current through, the resistor ...


5

I've pulled a few specs together from the parts you linked to: Flight controller: Input: 2S to 6S LiPo (7V to 20V) Output: 5V 3A VTX: Input: 7V to 24V Output: 5V 0.3A Camera: Input: 5V 0.65A --OR-- 12V 0.27A You don't mention what size battery you are using, but I will assume it is in the FCs range of 2S to 6S. The camera needs too much current (0....


4

There’s a lot to unpack here, so I’m going to give a general kind of advice that should be helpful for anyone trying to get cleaner video: Electrical Power There are two main aspect to the image transmission: the camera and the VTX. Whenever you have noise, the first step would be to increase power filtering as much as possible. The easiest way to do this is ...


4

A small scale power supply with over-current protection also works well. The type to get are little cheap build yourself units, with a display that allows you to adjust output voltage and display output current. They can be powered from a lipo. They are useful for a whole bunch of things, but in the smoke stopper situation they go to max current and that'...


4

There are two problems to mitigate here - incorrect polarity and overcurrent - which have different solutions but can be used together. To protect against a battery being connected backwards you need to add a diode in series with the battery. This will cause a voltage drop - from 0.7V to 1.4V depending on the diode - and will need to be rated to handle the ...


4

The first step I take to help protect my gear from shorting out from water is to apply silicone conformal coating to all the electronics I can. I cover the ESC, flight controller, vtx, and any other exposed electronics. I find that this also provides some protection from random solder drips or conductive grains of sand. However you have to be very careful ...


3

Summary The necessary electronic components: Transmitter & receiver, ESC, motor, servos. (yes, it really is that simple) How they are linked together: basically; battery plugs into ESC input, ESC plugs into receiver, servos plug into receiver, and motor plugs into the ESC output. Detailed explanation The construction of a fixed wing can be fairly ...


3

The image below shows a fairly basic fixed wing electronic configuration. Depending on your design you might not need it all, and for more complicated builds with flaps and retractable gear you would want more, but I think it is a good overview. For the most part, you should not need to solder; most hobby electronics comes with common connectors pre-fitted ...


2

Using PM07 power management board from Holybro as an example. They use shunt resistor on the high side. Voltage across the shunt resistor is then fed into the Texas Instruments INA169 current sense amplifier. Gain and BW of the amplifier is set using an external resistor. I was designing my own power management board recently and had exactly the same ...


2

There are a bunch of problems which need to be overcome when using the RPi GPIO serial port. The RPi normally runs a login process on the serial port, this will need to be disabled. sudo systemctl stop serial-getty@ttyS0.service sudo systemctl disable serial-getty@ttyS0.service you will also need to edit /boot/cmdline.txt and remove this part: console=...


1

The problem was indeed the 5V regulator. I bought an external 5V 1.2A regulator and hooked up the camera and VTX to it, and all my problems have disappeared.


1

I am not an electronics expert, but it sounds like it is a problem with the voltage regulator and as such, adding a capacitor wouldn’t solve the problem. I would suggest you try running the camera off of another BEC, especially if you can power it from a VTX output as this will also reduce noise. If you have no other BEC available, you can add a separate ...


1

As mentioned a conformal coating is what you need. There are various types and methods of application. I haven't personally used this product, but it does look like the best and easiest: https://drydronewaterproofing.com/ Other options are more standard electronic conformal coats which you apply with a brush or spray (hint: spray gets really messy, get the ...


Only top voted, non community-wiki answers of a minimum length are eligible