Mark Murray

About

Gender

Male

About Me:

Software engineering for a living, science for sport.

Please tell us a bit about your UAV interest

Want to combine electronics hobby with light aircraft flying just for fun.

Hometown:

Cambridge

Blog Posts

Activity Feed

Mark Murray commented on Bryan Galusha's blog post iDroneLink: iOS Groundstation

"How soon is "soon" for the 433MHz version? :-)"

Mark Murray replied to Randy's discussion ArduCopter 2.8 / 2.8.1 released

"HiI have a funny issue with mission planner; setting waypoints by clicking on the map is VERY unreliable; most of the time it just plain doesn't work. I can set 1-2 waypoints, and after that, waypoint-adding is mostly ignored. Other dialogue widgets…"

Mark Murray commented on emile's blog post Add a backup battery on the MTK GPS module.

"@emile: Sure! I'll see if it works first, then put the full story up here.

The intention is to do something like this (using lousy ASCII-art for the diagram)

5v(+)--->|--->|---\/\/\/\---(A)---|(-----(O) Gnd

This forms a string of components from…"

Mark Murray commented on emile's blog post Add a backup battery on the MTK GPS module.

"@emile: Er, do you want me to give more info or are you offering to give me more? :-)

M"

Mark Murray commented on emile's blog post Add a backup battery on the MTK GPS module.

"Hi

This is good news! It looks like something very similar can be done on APMv2, except that there is a convenient resistor to remove (R3) giving a pad to connect the battery to.

I'll probably go a step further by using a 1F SuperCap in place of…"

Mark Murray replied to Mark Murray's discussion Power tolerance on APMv2 from BEC

"Follow-up:

With a 15R load (so 0.33A) the Turnigy BEC's voltage drops to 5V. What current does the APMv2 draw, please?

Hmm. This may be worth making a multimeter probe for. (Way make one? I'm disabled, with dodgy hands, and I don't trust myself to…"

Mark Murray posted a discussion

Power tolerance on APMv2 from BEC

Hi *I want to add a BEC into my Quad as I'm getting a marginal voltage from the ESC's onboard BEC. The ESC/BEC gives me 4.7 as measured on the APMv2 and I'm nervous of reboots and drop-outs, so I got a Turnigy 5V/3A dedicated BEC. Problem is, its…

Mark Murray left a comment on South African DIY Drones User Group

"I'm an ex-Saffa in Cambridge UK. I have a 3DR quad with APMv2 and all the after-market add-ons; U/I Sensor, Optical flow, Sonar, Video Downlink.

I'm training for a PPL in my Copious Free Time(tm).

I Still go to Slaapstad occasionally ;-)

M"