Recent content by Earthman

An Omni antenna, like the simple rod antennas, transmits and receives about same in all directions except off the ends on the antenna where there are dead zones. So, don’t point the receiver antenna at the transmitter antenna or vice versa. Also, rod antennas polarize the transmit and receive...

Make sure you are using an automatic balance charger set to LiPo. Follow the instructions for the charger and use the Balance Charge setting rather than the Charge setting. Make sure you plug the balance connector(s) of the battery(ies) in to the charger. Charge at a charge rate (amperage) of...

Swelling is a sign that something isn’t right with the battery, especially when compared with batteries of the same make, size, and use history that haven’t swollen. Worn out, damaged, or abused batteries often swell and pose an increased risk of fire and explosion. See dozens of YouTube...

I have a Mobula 6, which flys better than the other cheap quads of its size that I have. I I have a Mobula 6, which flys better than the other two or three quads of its size that I have. Watch this review of the Mobula 7 by Joshua Bardwell: You may be able to find additional videos online...

I remember asking the same question not thst long ago. Don’t get discouraged, It takes lots of stick time. Learn about the different flight modes, the onboard sensors needed to support them, and how they can help you learn to fly. There is angle mode that limits pitch and roll angles (needs...

You can design and print the object with rounded corners where needed, or with a different fastening system that doesn’t scratch the camera. If printed with PLA, ABS, or some other ridged plastic, you may be able to round the the corners post-printing with sand paper. You may also be able to...

HighTech, thanks for the additional explanation. I assume that you are saying that 1.1-amp maybe flowing into the parallel charge board, but that flow would be split between the two batteries in our example. So, if both batteries are at the same voltage, they would each see 0.55-amps until...

I see what you are saying and agree with you. I misunderstood your point. My statements and concerns about parallel charging and charge rate assumed the cells in parallel were at the same voltage but have different capacities. For example, if you charged a 100-mah cell in parallel with a...

Sorry, I didn’t save the instructions that came with my parallel charge boards, but what I said is what I remember from reading the instructions. I also know that the boards have no intelligence, so all the batteries and their cells are just connected in parallel, which is why the charger sees...

Manufacturers say don’t mix capacities in a parallel charge board. I agree because to the charger, the parallel board appears to be a single battery. The charger/board doesn’t charge the batteries individually. They all get the same current. If you charge at 1C for the larger capacity...

Do what Futuramille said, but try another voltage checker first. The one you are using may be defective on the pin/circuit for that cell (assuming it’s the same cell in two different batteries that appear bad). If the individual cell voltages match what you are getting with your buzzer, then you...

We have until March 2, 2020 to leave formal comments to the FAA on this proposed rule. Please comment. Tips for leaving formal comments: https://www.regulations.gov/docs/Tips_For_Submitting_Effective_Comments.pdf Direct link to FAA comment page...

Here’s a link to the proposed rule for Remote ID on the Federal Register’s webpage: Remote Identification of Unmanned Aircraft Systems This action would require the remote identification of unmanned aircraft systems. The remote identification of unmanned aircraft systems in the airspace of the...

What do you mean by “control?” What are you trying to do with the motor? Just turn it on/off? Control it’s speed and direction? By “DC motor,” I assume you mean that it’s a brushed motor rather than a brushless motor. In any case, you will likely need another circuit between the DC motor and...

Very nicely done. All my nice work benches are buried under years of accumulated stuff (some, no most would say junk). Now I have to build new stuff on the kitchen table.