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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Big thankyous to Peter, Rob, Robert, Rob and Neville. I've now got plenty to go on with. Since asking for help I've unearthed a heap of PICAXE stuff at Wiltronics here in Ballarat developed by Rob Ward. Anyone else wanting info on PICAXE interfacing circuits need only check the latest Wiltronics catalogue.</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>Best regards</FONT></DIV>
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<DIV><FONT face=Verdana color=#808000><EM><STRONG>Roger Knight</STRONG></EM></FONT></DIV>
<DIV><FONT face=Verdana color=#808000><EM>Technology Dept.</EM></FONT></DIV>
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<FONT face=Tahoma size=2><B>From:</B> Peter A Ward<BR><B>Sent:</B> Sun 29/06/2008 11:56 AM<BR><B>To:</B> Systems and Engineering Teachers' Mailing List<BR><B>Subject:</B> [Systems Engineering Teachers' Mailing List] Re: PICAXE<BR></FONT><BR></DIV>
<DIV><PRE style="WORD-WRAP: break-word">Thanks Rob,
I must admit I forgot about those transistors that were built into
that picaxe board which was designed by my brother. Roger you my like
to contact him as he has some nice picaxe board designs which work
well in secondary student projects.
You will get Rob at.... ward.robert.c@edumail.vic.gov.au
Cheers
Peter A Ward
ePotential Coordinator
Euroa Secondary College
ward.peter.a@edumail.vic.gov.au
On 28/06/2008, at 7:11 PM, Rob Gray wrote:
> Hi Roger,
>
> If you run the output signal(s) from the picaxe through a transistor
> such as a BD 140, that will give it enough grunt to drive the coil
> of most relays. A peek at Peter's second picture shows two such
> transistors on the circuit.
> My students have used this technique to drive windscreen motors via
> a relay in the past with great success.
>
> The advantage of using relays is the ability to reverse the motor
> should they need to.
>
> Best of luck with it.
>
> Rob Gray
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