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Old Mar 20, 2007, 09:19 PM
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choffman41's Avatar
Mokelumne Hill CA
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Simple timer for electric C/L

Anyone have a schematic or a source for a simple timer that would shut down an electric motor after a specified flight time? I don't want to mess with any radio controlled ESC or anything like that. Thanks...
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Old Mar 20, 2007, 11:30 PM
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Norm Furutani's Avatar
United States, CA, Gardena
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I have used the ZTRON timer. It is easy to set up and works well. Try this site for info: http://www.bsdmicrorc.com/productDet...58&catID=10006

- Norm
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Old Mar 20, 2007, 11:35 PM
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Mike Palko's Avatar
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Are you aware there are already several C/L timers on the market (Z-tron and JMP)? They are available through www.windyurtnowski.com or www.bsdmicrorc.com.

You mention not wanting to mess with a R/C ESC. I assume from that statement you are using a brushed motor? Either way (brushed or brushless) you need an ESC for the mentioned timers to work.

Mike
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Old Mar 21, 2007, 05:24 AM
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Staffs, UK
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What type and size of motor ?

If you do a search in this forum for "timer" you'll find lots of circuits. Some work with an ESC and some will drive a small brushed motor directly. You'll also find other ways of controlling motors e.g. with a servo tester down the lines. No radios needed .

Steve
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Old Apr 26, 2007, 04:40 AM
Common Sense Support Crew
Rensselaer, IN USA
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Zombie from Atomic Workshop

Quote:
Originally Posted by choffman41
Anyone have a schematic or a source for a simple timer that would shut down an electric motor after a specified flight time? I don't want to mess with any radio controlled ESC or anything like that. Thanks...
You can get the Zombie from Atomic Workshop. It has a built-in esc [4a], 2 timers, 2 power settings and a delayed startup.

http://www.atomicworkshop.co.uk/cata...roducts_id=182

Randy
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Old Jun 17, 2007, 10:37 PM
electronics gremlins hate me..
middlesbrough, uk
Joined May 2007
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ummm, maybe im being stupid here but couldnt you just use a switch if its only to stop the plane?
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Old Jun 18, 2007, 03:22 AM
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Schipperskerk, The Netherlands
Joined Dec 2001
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here is a small version off the timer Robert Jan designed. I tested it and it works perfect. You can adjust the time and the rpm off the motor. Every controller works with this timer for the brushless version s they have to be used in governormode for best control.

http://www.modelbouwforum.nl/phpBB2/...ic.php?t=52158

and here is the start off the project http://www.modelbouwforum.nl/phpBB2/...ic.php?t=49324

2 movies off me flying for the first time indoor control line
http://www.airtoimedia.nl/web/upload...oaandelijn.wmv

http://www.airtoimedia.nl/web/upload...indecircel.wmv

sorry, but the pages are in dutch. please feel free to ask questions on those pages even in english, we all can understand you then.
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Old Jun 22, 2007, 10:18 AM
electronics gremlins hate me..
middlesbrough, uk
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Can somebody please explain why you would want to use a timer? I consider preset flight time one of the bigest limitations of glow powered cl models!
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Old Jun 22, 2007, 01:08 PM
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I suppose it depends what exactly you are flying and also what you are suggesting instead of a timer.

A switch on the handle needs (draggy) insulated lines plus some (specialised) electronics in the plane unless you're flying with power down the lines. Just flying until the battery dies is a really bad idea and anyway many competitions have maximum flight times.

Steve
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Old Jun 23, 2007, 06:15 PM
electronics gremlins hate me..
middlesbrough, uk
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ahh fair enough, i just meant for casual flying, but i accept what you say about the insulated lines. The electronics would actually be very simple to make as long as full power all the time was ok. Just a relay, a few plugs and a small extra battery in the handle, a couple of AA baterys would do it. Far cheaper than an esc!
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Old Jun 24, 2007, 03:41 AM
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Quote:
Originally Posted by bob_v5
The electronics would actually be very simple to make as long as full power all the time was ok. Just a relay, a few plugs and a small extra battery in the handle, a couple of AA baterys would do it. Far cheaper than an esc!
Been there, done that.....but it only works for brushed motors . Many people are using the more efficient brushless motors for new designs these days and they won't run without an ESC and some circuit which can simulate the signal from a receiver.

It really does all depend on what you want to fly. If you're happy to limit yourself to small models and stick with old-fashioned brushed motors (which can still be loads of fun) then you're right, you don't need an ESC and so you don't need a timer or other circuit to drive it. But there's an awful lot of electric C/L which you couldn't do with those restrictions.

Steve
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Old Jun 24, 2007, 12:54 PM
electronics gremlins hate me..
middlesbrough, uk
Joined May 2007
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ahhh brushless, forgot about them! I'm sure there will be (relativley) simple driver circuits around though, perhaps on electronics sites rather than rc ones.
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