Gerard Toonstra
  • Male
  • Pernambuco
  • Brazil

Gerard Toonstra's Friends

  • pixof
  • Tim KING
  • Workswell
  • Jaco
  • Jonathan Meringer
  • Igor Visioli
  • David Locascio
  • Yves Jusot
  • Patrick Egan
  • Ítalo Gustavo Araújo
  • Bruno Freitas
  • Karan Chawla
  • Christopher Stephens
  • Rui Costa
  • Gustavo Togeiro de Alckmin

Gerard Toonstra's Groups

Gerard Toonstra's Discussions

Vector control ESC

Started Mar 22, 2015 0 Replies

About half a year ago,…Continue

Tags: control, oriented, field

Simulator (python) for BLDC motor control

Started Mar 15, 2015 0 Replies

I'm developing the control software for my own ESC and recognized the need for a simulation model so that I can run my algorithm against it, so that I can see the effect of a variety of issues.…Continue

Tags: motor, simulator, simulation, controller, BLDC

Johnny Dronehunter

Started this discussion. Last reply by John Arne Birkeland Aug 3, 2014. 1 Reply


Drone crashes on parking lot (Cypress, Texas)

Started this discussion. Last reply by Keith Bartlett Apr 10, 2014. 2 Replies

From local news, unconfirmed by me:CYPRESS, Texas -- A customer at an HEB store in Cypress was stunned when something fell from the sky Tuesday – a drone!…Continue


Gerard Toonstra's Page

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Gerard Toonstra's Blog

Opensourcing ESC work

Posted on July 12, 2015 at 6:00am 12 Comments

So almost a year ago, I posted about how I started work on a field oriented control ESC:

Redesigning multirotor ESC's

Some people in the comments already said how they made their own or started work on different ESC's. I went through 5 iterations of the ESC after the…


Experiments with an industrial USB webcam

Posted on July 3, 2015 at 3:51pm 6 Comments

Above is a fullsize image of a 5MP webcam. A webcam usually has a CMOS sensor and commercial ones support up to 720p resolution. 720p is a result of the usb bus bandwidth available to stream the images and since many computers still use USB 2.0, this is the maximum resolution for reasonable framerates of 25fps or so. At USB 3.0 you can achieve 30fps with uncompressed data, or…


Project Ion charter

Posted on June 7, 2015 at 1:57pm 8 Comments

I'd like to invite the diydrones members to participate in a project I started on github: Project Ion on github

The control of uav's have improved a whole lot in the past couple of years and you can now pretty much put one in the air and wait for the results to come back, whether these are videos…


Cheap 1-2cm (scale) accuracy for your surveys

Posted on April 21, 2015 at 7:46pm 54 Comments

Image: Topcon RTK collecting survey points

High precision GPS systems are getting more known and used and RTK is already becoming a familiar acronym. This post is about the use of RTK for collecting ground control points to be used in high quality survey results, not about RTK for navigation use (that's a lot harder). What I was looking for is…


Comment Wall (2 comments)

At 2:46pm on May 1, 2014, Giovanni Gadaleta said…

Good morning Mr. Toonstra's
I congratulate you on the work posted right now.
I have a question for you: if you use a Canon SX260 could you tell me the GPS coordinate at which point of the picture refers?

Thank you very much.


At 10:39am on January 20, 2015, Tom McKinnon said…

Gerald,  We haven't processed imagery from very much sugar cane so we'd be very interested in helping you out with your project.


Tom McKinnon

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