[Systems Engineering Teachers' Mailing List] Re: PICAXE

[Roger Knight]

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.

Best regards



Roger Knight
Technology Dept.
Pastoral Care Tutor PGSR1A
St Patrick's College
1431 Sturt Street
BALLARAT 3350 VIC
5331 1688
Mobile 0424395401
rknight at stpats.vic.edu.au



From: Peter A Ward
Sent: Sun 29/06/2008 11:56 AM
To: Systems and Engineering Teachers' Mailing List
Subject: [Systems Engineering Teachers' Mailing List] Re: PICAXE


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 at edumail.vic.gov.au
Cheers
Peter A Ward
ePotential Coordinator
Euroa Secondary College
ward.peter.a at 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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