[Heathkit] off-subject motor speed controller

[wolfbob]

Ed..

There is a dearth of small 24v controllers in the electric 
scooter world. These are the scooters used by kids to maim 
their bodies. I found a charger (24v 2A fully automatic on 
ebay for $8.50 whearas the mobility scooter folk what $125). 
It looks like you can get one for less than $20.
see:

http://www.scooterparts4less.com/all_electric_scooter_parts.htm

WBob,WB6JPI


----- Original Message ----- 
From: "Edward B Richards" <zuu6k at juno.com>
To: <heathkit at mailman.qth.net>
Sent: Thursday, August 02, 2007 11:51 AM
Subject: [Heathkit] off-subject motor speed controller


> Good Morning Gang. I apologize for posting an off-subject 
> post, but
> obviously I am going to do it anyway. There is such a mass 
> of talent on
> these reflectors I don't know where else to go to get 
> technical advise.
> Among my problems are bad knees , hips, and back. My 
> doctor won't allow
> knee surgery because the anaesthetic would be risky for me 
> with my heart
> trouble (CHF). I use an electric scooter to get around 
> although I can
> walk short distances. Twice now, the controller for the 
> scooter has
> failed. It is an older model and no longer made. They are 
> hard to find
> and expensive when you do. The speed is controlled by 
> twisting a handle
> grip, like a motorcycle. This goes to a controller that 
> allows the
> current to flow to the motor. When the controller goes out 
> the motor will
> not run. It is a 24 volt motor with 2 each 12 volt 
> batteries in series. I
> don't know the motor current but the whole scooter is 
> protected by a 15
> amp fuse that includes a couple of lights. I would say 15 
> amps to be
> safe. I am looking for someone who is able and willing to 
> help me design
> a simple controller that I can build. I am thinking of a 
> pass transistor
> controlled by a potentiometer. Maybe a DC amplifier in 
> between. I don't
> know enough to do it by myself. Thank you.
>
> 73,   Ed Richards   K6UUZ
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