Alt-BEAM Archive

Message #03380



To: Wouter Brok w.j.m.brok@stud.tue.nl, westy civic83@execulink.com
From: Dennison dennlill@buffnet.net
Date: Wed, 19 May 1999 08:38:23 -0400
Subject: [alt-beam] Re: phototropic bicore


I agree. Use another bicore to handle the PWM.

Dennison

>
>Don't use 555's; they are really ugly IC's once you know about BEAM. Have a
>look at the stuff which has been sent by Wilf a couple of days back. I
>didn't have time yet to study the circuits, but if I remember well it can
>also be used as pulse width modulation (PWM) .... I'm not sure though; have
>to have a read through it.
>
>
>Regards,
>
>Wouter Brok.
>
>
>
>> Hello, I was wondering if anyone can point me to info on phototropic
>>bicores, I have the schematic from beam-online, but have a question about
it.
>>
>> I only need the head to rotate about 15 degrees either way of dead
center,
>>then stop turning. will the head do that automatically?, there are
>>mechanical stops that will prevent it from turning past that, but the
>>bicore will still try turning the motor, which I can see burning something
>>out eventually? I was thinking of limit switches singnaling that the end
>>of travel has been reached. Any ideas?
>>
>> Also, any ideas for a curcuit that controlls the speed of a motor
>>proportional the the amount of light falling on a cds cell, I was thinking
>>of a 555 circuit of some sort, using the cds cell to vary the resistance
>>causing the timing of the 555 the vary???
>>
>> Thanks for any help.
>>
>>Shawn Westbrook
>>civic83@execulink.com
>>
>>
>
>


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