The Turnigy Micro Tach is an inexpensive little tachometer for measuring propeller speed.
Like most other users seem to report, every time I reach for it, it has a flat battery and battery replacement is a chore. Continue reading Turnigy Micro Tach – battery issues
This article documents a series of tests of BLHeli v11.2 damping.
The test configuration is 4S Lipo, HK 9261000003 ESC, HK 4822-690kv motor with 1045SF prop in a static bench test. Note that the ESC uses FET driver chips that deliver quite fast switching. Continue reading BLHeli v11.2 damping evaluation
The clock used in most Silabs C8051F33x based ESCs is an internal RC clock quoted at 2% accuracy, and 50ppm/° temperature sensitivity. Continue reading ESC oscillator accuracy – Silabs internal oscillator
This article documents some comparison tests of:
Continue reading Comparison of SimonK and BLHeli on an Afro30 ESC
Following on from BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003… and BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #2…
This article documents some comparison tests of:
Continue reading BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #3
Following on from BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003…
I was sent some further info on the bootloader firmware and adapter hardware.
Initial experiments using an adapter that I use for a range of this type of application were unsuccessful. On examining the waveforms with a ‘scope, it was apparent that a lower value of pull-up resistor was required. Continue reading BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #2
The recent release 11.2 of BLHeli supports some popular Atmel based ESCs.
This article is a review of HK_UBEC_40A_MULTI_REV11_2 on that ESC (http://www.hobbyking.com/hobbyking/s…arehouse_.html) at 4S with a Hobbyking 4822-690Kv 22 pole motor and 1045 SF propeller. This ESC was chosen as it is an inexpensive ESC that rates well in features (fast N FETs, support for bootloader and fully damped mode) in BLHelis documented compatibility list. Continue reading BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003
A new Red Brick 70A ESC (including BEC) was received and checkout performed to select a SImonK module to load.
COMP_PWM is an option on SimonK ESC firmware for sensorless brushless DC motors (Kirby 2011),
This article looks at the current waveforms resulting from that implementation, and is an expansion of (Duffy 2014).
SimonK commit 1f75da: (20140313) with COMP_PWM was loaded on the F-30A ESCs on this X450 quad with APM FC, 3S, Hobbyking D2836-8 1000kv motors and 11×4.5 SF propellers.
Performed rapid acceleration under WOT, motor idle, recovery, maneuvers and no issues, no hint of sync problems, works fine.
