Electronic choke

essness · 11-30-2010, 03:58 PM

Well, here's my idea. The ignition switch I bought for my workhorse / Honda 20 conversion is for a Harley with a "push to choke" feature.
So, I wanted to put in a servo motor to use the push on the key switch to choke.
My thought was something like pictured. The problem is, it's a 4.8 volt servo. How can I easily step the voltage and amps down from 12 to 4.8?

mikesmotortoys · 11-30-2010, 04:39 PM

You want to waste that feature on a CHOKE? What about Nitrous injection instead?

essness · 11-30-2010, 04:42 PM

Quote:

Originally Posted by mikesmotortoys

You want to waste that feature on a CHOKE? What about Nitrous injection instead?

HA! Hey Mike. Nitrous only works when the engine's running. And it's gettin cold as hell here. So,...........

DOOmsman · 11-30-2010, 04:50 PM

Ess try this site, you will need the aproximate amp draw of the solinoid.

http://www.the12volt.com/ohm/page2.asp

Or this may do it for you
http://www.autopartsdealer.com/painl...ntent=APD92097

DOOmsman · 11-30-2010, 05:23 PM

OR THIS

Amazon.com: CRIME STOPPER CS-610SI Power Door-Lock Actuator: Electronics

roady89 · 11-30-2010, 06:00 PM

Scott, a servo like that won't work. It doesn't work like a simple on/off, it has a positive, negative and a signal wire. Signal is controlled by PWM. (pulse width modulation) You CAN find different servos that will work, just not that one. Dooms is on the right track too, something like that would work.

You can get step downs on the cheap for servos.

roady89 · 11-30-2010, 06:12 PM

I "think" something like a "Retract" servo would work, not sure. Those move full lock to lock.

Something like this I think. http://www.hobbyking.com/hobbyking/s...341&aff=277578

Then a voltage step down. AKA "BEC", this one is 8-40 VDC input to 5VDC or 6VDC output @5 amps. http://www.hobbyking.com/hobbyking/s...313&aff=277578

crash12888 · 11-30-2010, 06:39 PM

Ess, I used a 12v trunk lock actuator from a car to work the choke on the Yamazuki, works really well and very strong.
Cheap at a junkyard.

FYI,
If anyone is interested some of the marine/boat ignition switches have the same push to choke feature and are cheap from ebay.
"Harley" ouch! $$$$$$$$

essness · 11-30-2010, 08:00 PM

Thanks guys, I'm checking it all out..........

Quote:

Originally Posted by crash12888

Ess, I used a 12v trunk lock actuator from a car to work the choke on the Yamazuki, works really well and very strong.
Cheap at a junkyard.

FYI,
If anyone is interested some of the marine/boat ignition switches have the same push to choke feature and are cheap from ebay.
"Harley" ouch! $$$$$$$$

Crash, $16.00 from a local custom shop

gornoman · 11-30-2010, 08:10 PM

Sparky carts don't need a choke.

Jus' sayin'

11-30-2010, 04:39 PM	#2
mikesmotortoys Gone Wild Join Date: Mar 2008 Location: Rockwall, Texas (Dallas / Ft. Worth) Posts: 7,077	Re: Electronic choke You want to waste that feature on a CHOKE? What about Nitrous injection instead?
	www.MIKESMOTORTOYS.com www.EZGOPARTSONLINE.com Factory EZGO - Bad Boy Buggy - Dixie Chopper Mowers

11-30-2010, 04:50 PM	#4
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Electronic choke Ess try this site, you will need the aproximate amp draw of the solinoid. http://www.the12volt.com/ohm/page2.asp Or this may do it for you http://www.autopartsdealer.com/painl...ntent=APD92097

11-30-2010, 05:23 PM	#5
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Electronic choke OR THIS Amazon.com: CRIME STOPPER CS-610SI Power Door-Lock Actuator: Electronics Amazon.com: CRIME STOPPER CS-610SI Power Door-Lock Actuator: Electronics

11-30-2010, 06:00 PM	#6
roady89 nimda Join Date: Jun 2007 Posts: 13,022	Re: Electronic choke Scott, a servo like that won't work. It doesn't work like a simple on/off, it has a positive, negative and a signal wire. Signal is controlled by PWM. (pulse width modulation) You CAN find different servos that will work, just not that one. Dooms is on the right track too, something like that would work. You can get step downs on the cheap for servos.
roady89 nimda Join Date: Jun 2007 Posts: 13,022

11-30-2010, 06:12 PM	#7
roady89 nimda Join Date: Jun 2007 Posts: 13,022	Re: Electronic choke I "think" something like a "Retract" servo would work, not sure. Those move full lock to lock. Something like this I think. http://www.hobbyking.com/hobbyking/s...341&aff=277578 Then a voltage step down. AKA "BEC", this one is 8-40 VDC input to 5VDC or 6VDC output @5 amps. http://www.hobbyking.com/hobbyking/s...313&aff=277578
roady89 nimda Join Date: Jun 2007 Posts: 13,022

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11-30-2010, 06:39 PM	#8
crash12888 Gone Crazy Join Date: Jan 2007 Location: Chesterfield, Va Posts: 6,021	Re: Electronic choke Ess, I used a 12v trunk lock actuator from a car to work the choke on the Yamazuki, works really well and very strong. Cheap at a junkyard. FYI, If anyone is interested some of the marine/boat ignition switches have the same push to choke feature and are cheap from ebay. "Harley" ouch! $$$$$$$$

11-30-2010, 08:10 PM	#10
gornoman Stay thirsty my friends! Join Date: Jan 2007 Location: Suburban Chicago Posts: 24,286	Re: Electronic choke Sparky carts don't need a choke. Jus' sayin'

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