CO2 Tyre Inflators

[Ian]

I have a small 12V compressor that I carry in the car, it's about 4" x 4" x 2½" and weighs less than a pound, it's a cheap Chinese job I bought for £7.99 from an English hardware store chain called Wilkinsons. It's fine for use on on a car but 36V from the bike battery may cause it a problem

Ian.

 

[Healthebike]

More on 12V electric pump

My bike is 24V. I am considering 12V rear LED and headlamp running off bike power rather than replaceable battery just "because I can". I currently power a 5V satellite radio from AA batteries. I have a 12V to 5 V adapter. I suppose what I need is a reliable 24V to 12V converter. That would allow the use of an inexpensive lightweight 12V pump. Anyone have experience with 24V to 12V conversion for lights or other accessories?

 

[Ian]

Hi John,

something like an LM7812 voltage regulator mounted on a suitable heat sink (the frame will do!) will supply up to 1 amp for your lighting and radio, but a compressor requires considerably more current. The best I can think of is to temporally wire the battery in series-parallel for 12V, or just tap into the battery to use half the cells.

Ian.

 

[Healthebike]

more on electric motor

found a lightweight 10A 24V-12V dc reducer on ebay and this 1+ pound compressor
TwistedThrottle.com : Airman Sparrow Mini Compressor/Tire Inflator Pump MXP211 for 12-volt car plug & BMW/Powerlet plug - MXP211

I could eliminate the pound of AA batteries powering my radio and drive lights as well. What other benefits of potential 100 PSI compressed air onboard? horn? water fountain? No comments necessary just having fun with the idea.

 

[Ian]

this 1+ pound compressor
TwistedThrottle.com : Airman Sparrow Mini Compressor/Tire Inflator Pump MXP211 for 12-volt car plug & BMW/Powerlet plug - MXP211

That 12V compressor looks identical to mine, apart from the brand name and price.

 

[flecc]

Of course there's always low loss innertubes.

 

[Healthebike]

Electric onboard Air compressor

Thought you might like to see the finished product for 12 volt onboard
100 PSI air compressor

TwistedThrottle.com : Airman Sparrow Mini Compressor/Tire Inflator Pump MXP211 for 12-volt car plug & BMW/Powerlet plug - MXP211

24 to 12VDC 10 amp voltage reducer
http://i15.ebayimg.com/05/i/08/05/67/ab_2.JPG


http://www.healthebike.com/lafree/bike4.jpg
Mounted to the rear rack and connected to 24VDC battery supply
(The black box in front is 12-5VDC 2 Amp converter for my satellite radio)

http://www.healthebike.com/lafree/bike5.jpg

or whole bike http://www.healthebike.com/lafree/bike2.jpg

 

[JohnInStockie]

Wow, now that just shows you what ingenuity can do!