Echo G
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Latest Activity

Bart Theys commented on Echo G's blog post Thinking about designing multirotors to optimizing flight time
"the efficiency of your propeller will not change if you take another motor, it will be the motor + ESC combination that will not have the same efficiency depending on the esc+mot+propeller combination. Propeller efficiency in hover is characterized…"
Oct 10
Jim Faunce commented on Echo G's blog post Thinking about designing multirotors to optimizing flight time
"As you state, it is a complex multidisciplinary problem, with many variables.  However, assuming you want to use commercial off the shelf (COTS) components, your variables are quickly reduced.  The first thing to do is write down the…"
Oct 9
Kelly Schrock commented on Echo G's blog post The Dumb-Battery Era is Over
""I2C on their resume"... I think you misspelled "CAN" :-D"
Oct 7
Jack Crossfire commented on Echo G's blog post The Dumb-Battery Era is Over
"I2C sounds like mechanism envy, because everyone who programs a computer these days needs to have I2C on their resume.   Most of the smart batteries use a single wire interface."
Oct 7
Don LeRoi commented on Echo G's blog post The Dumb-Battery Era is Over
"Right.  I was relating a little history of why we got rid of the smart part of the only smart batteries that existed when this technology was new.  Also, why you wouldn't want to use an off-the-shelf cordless tool pack, which do cut…"
Oct 7
Echo G commented on Echo G's blog post The Dumb-Battery Era is Over
"Batmons do not have an electronic safety cutoff. It relies on the autopilot to make the decision to land/cutoff power based on the state-of-charge data provided by Batmon"
Oct 6
Don LeRoi commented on Echo G's blog post The Dumb-Battery Era is Over
"We used to make our battery packs out of Milwaukee V28 batteries by disassembling them, discarding the "smarts", and saving just the 7 individual cells to wire into 3s to 7s packs.  The reason for discarding the electronics was fear…"
Oct 6
Mateusz Sadowski commented on Echo G's blog post Thinking about designing multirotors to optimizing flight time
"In my first internship I was testing various propeller - motor combinations to plot the thrust to power ratio. Good times!"
Oct 4
Echo G posted blog posts
Oct 2
Thomas Butler commented on Echo G's blog post The Dumb-Battery Era is Over
"Additionally, all that is needed for a standardized battery; with an SMBus output over I2C/CAN/RS422 or whatever..."
Oct 2
Thomas Butler commented on Echo G's blog post The Dumb-Battery Era is Over
"@kelly, I was referring the electronics as being a no brainer. Indeed getting them to make a battery specifically for drones and then standardize it is a challenge. Chinese battery makers/sellers (aka HK) are reluctant to upset the status quo;…"
Oct 2
Kelly Schrock commented on Echo G's blog post The Dumb-Battery Era is Over
"@Thomas Butler Do you know which (if any) of these batteries are SMBus compatible? I've thought the same thing for a while, that there's a ready supply of smart batteries available for power tools that would be great in a drone. I hardly…"
Oct 2
Thomas Butler commented on Echo G's blog post The Dumb-Battery Era is Over
"No need to re-invent the wheel. "Smart" LiPO batteries already exist. They are used by Milwaukee, DeWalt, Black and Decker, etc. I have recharged my M18 Milweaukee drill LiPO battery dozens of times, and it is STILL going strong. The…"
Oct 1
Echo G commented on Echo G's blog post The Dumb-Battery Era is Over
"You can PM me for ordering a battery. "
Oct 1
ming.lv commented on Echo G's blog post The Dumb-Battery Era is Over
"电池哪里有卖"
Sep 30
Aedrox commented on Echo G's blog post The Dumb-Battery Era is Over
"Founded it's an : Amass XT90i"
Sep 30

Profile Information

Please tell us a bit about your UAV interest
Quad , flying camera
Hometown:
Usa

Echo G's Blog

Thinking about designing multirotors to optimizing flight time

Posted on October 2, 2019 at 6:30am 3 Comments

Designing electric multicopters for a specific flight time is a complex multidisciplinary optimization problem. This short blog post is some of my thoughts on how to think about this problem. Obviously, there so many different ways of doing this and welcome suggestions and other constructive…

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The Dumb-Battery Era is Over

Posted on September 22, 2019 at 4:30pm 20 Comments

Over the past couple of…

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Batmon: Pixhawk compatible, in-flight battery monitors with LED display

Posted on January 3, 2019 at 12:00pm 10 Comments

Happy new year to all flyers. 

We want to update the progress made on an in-flight battery monitor. Initial revisions of the board were meant to capture accurate cell voltages for the flight batteries. However, lot of feedback was received to push the board towards a minimal Battery Monitoring System. Currently, most diy'ers and professional…

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Low current drain battery monitor with pixhawk interface (10 cell)

Posted on February 16, 2018 at 9:00am 11 Comments

In-flight monitoring of total battery voltage and individual cell voltage is important for accurately estimating flight time. Monitoring the cell voltages during flight and operating load conditions help to predict battery health and cell degradation. 
We designed a battery monitor board to interface with pixhawk to read the cell voltages of flight…
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