Re: Cordless screwdriver innards?

From: John Jardine (john_at_jjdesigns.fsnet.co.uk)
Date: 07/05/04 

Date: Mon, 5 Jul 2004 22:43:37 +0100

Terry Pinnell <terrypinDELETE@THESEdial.pipex.com> wrote in message
news:ac6je01pdtnu0ull25mbfpmkgeq40v9fh3@4ax.com...
> I'm thinking of using an old cordless screwdriver in an automatic
> curtain opener. Anyone been inside one who can tell me how accessible
> the electronics is please? I'd need to be able to operate it forward,
> backward and off.
>
> --
> Terry Pinnell
> Hobbyist, West Sussex, UK
>
I've scrapped 3 of them. The leccy bits are all within the trigger mech.
Speed control via a tiny linear pot moulded with the trigger. I found the PM
motors are OK but the electronics are magnificently designed and constructed
to do just the job in hand and very awkward to cannabalise for other uses.
Good luck with the curtain openers :-).
Tried it once with a windscreen wiper motor. This apparently simple project
to do a useful simple job, escalated over a 2 week period into a screaming
nightmare of electronic controls, timers, limit switches, wires, cords,
pulleys and mechanical hardware. The dynamics never 'felt' right and the
eventual size weight and complexity of this monster caused it (thankfully!)
to fall off the wall. A version #2 a couple of years later. worked but
wasn't really worth the effort.
Learnt at that point that some things are better off being industrially
manufactured.
regards
john

Relevant Pages

  • Re: Cordless screwdriver innards?
    ... Terry Pinnell wrote in message ... Speed control via a tiny linear pot moulded with the trigger. ... motors are OK but the electronics are magnificently designed and constructed ... Tried it once with a windscreen wiper motor. ...
    (sci.electronics.repair)
  • Re: Cordless screwdriver innards?
    ... Terry Pinnell wrote in message ... >>Speed control via a tiny linear pot moulded with the trigger. ... >>Tried it once with a windscreen wiper motor. ... > adapted it as a window opener/closer, where it worked well for some ...
    (sci.electronics.repair)
  • Re: Cordless screwdriver innards?
    ... Terry Pinnell wrote in message ... >>Speed control via a tiny linear pot moulded with the trigger. ... >>Tried it once with a windscreen wiper motor. ... > adapted it as a window opener/closer, where it worked well for some ...
    (sci.electronics.design)
  • Re: Cordless screwdriver innards?
    ... John Jardine wrote: ... > Speed control via a tiny linear pot moulded with the trigger. ... > motors are OK but the electronics are magnificently designed and constructed ... > Tried it once with a windscreen wiper motor. ...
    (sci.electronics.repair)
  • Re: Cordless screwdriver innards?
    ... John Jardine wrote: ... > Speed control via a tiny linear pot moulded with the trigger. ... > motors are OK but the electronics are magnificently designed and constructed ... > Tried it once with a windscreen wiper motor. ...
    (sci.electronics.design)