[TriEmbed] Need help with a beginner circuit design

[Carl Nobile]

Dave,

You can do all three of these things with separate 555 timers. Where the
voltage is high you may need to switch the voltage with a relay or a mosfet
(Probably why Pete asked about the voltage and current requirements). All
of these thing seem to require some sort of oscillator which the 555 timer
is perfect for, you will just need to change the timing of the circuit
depending on the frequency needed.

~Carl


On Tue, Oct 27, 2015 at 7:48 PM, Dave Buster via TriEmbed <
triembed at triembed.org> wrote:

> oh, and by the way, the voltage needs to pulse on and off a couple of
> times per second, just like the LED and beeper.  However, it might make
> sense to have them alternate timing to smooth out the duty cycle.
>
> db
>
> On Tue, Oct 27, 2015 at 7:47 PM, Dave Buster <dave.buster at gmail.com>
> wrote:
>
>> Thanks, Pete.
>>
>> To answer your question, I'd like to get up to about 80 volts, but at
>> VERY low current (just a few ma).  The goal is to create an electric field,
>> not really drive anything.
>>
>> One final request- the circuit board and battery need to fit in a PVC
>> pipe. (~ 1 inch inside diameter)
>>
>> Once I get this thing built, I'll be happy to give a presentation on a
>> very crazy idea.
>>
>> db
>>
>> On Tue, Oct 27, 2015 at 7:09 PM, Pete Soper via TriEmbed <
>> triembed at triembed.org> wrote:
>>
>>> This is exactly the right list. How high a voltage for how long (and how
>>> often) and at what current?
>>>
>>> -Pete
>>>
>>>
>>> On 10/27/2015 06:55 PM, Dave Buster via TriEmbed wrote:
>>>
>>> Hi-
>>> I'm a long-time lurker on this email, but I'm not active.
>>>
>>> It's been many, many years since I did Industrial engineering at NC
>>> State, and I've mostly been doing data communications and cyber security
>>> since then. In other words.... I'm no longer hands on. I don't even know
>>> how to solder any more.
>>>
>>> sigh.  This is embarrassing..
>>>
>>> Now I have a need to design a build a simple analog circuit for a hobby
>>> of mine, and I'm getting stumped.  I'm wondering if someone has some time
>>> to give me a few pointers and/or help me with the design.
>>>
>>> The battery-powered circuit will be very simple.  I need to flash an LED
>>> a couple of times per second (I got that working with a 555 timer), then I
>>> need to send beeps to a little piezo speaker (I'm still working on that),
>>> and finally, I need to pulse a high-voltage/low-current DC signal about
>>> twice per second.  I'm thinking of using a max1771 DC-DC converter for
>>> that.  ...and I'm in over my head.
>>>
>>> I won't be able to make it to the November meeting, but would it be
>>> possible to get someone to spare an hour some other evening to discuss this?
>>>
>>> Anyone want to volunteer to help a life-long learner?
>>>
>>> Here is an email account I don't use very much, but I'll be checking it:
>>>
>>> dave at tritonsharksignal.com
>>>
>>> Also, if this is not appropriate for this email thread, my apologies.
>>>
>>> thanks!
>>>
>>>
>>>
>>> --
>>> Dave Buster
>>>
>>> KK4ELT on 2 meters
>>>
>>> Never look at the trombones, it only encourages them.
>>> *Ri
>>> <http://t.sidekickopen23.com/e1t/c/5/f18dQhb0S7lC8dDMPbW2n0x6l2B9nMJW7t5XX45vMtjYVQZgwH64R1y4W8r4TLx56dPn8f5RTxgR02?t=http%3A%2F%2Fwww.brainyquote.com%2Fquotes%2Fauthors%2Fr%2Frichard_wagner.html&si=4964982235594752&pi=6f98b148-9f74-482e-d75c-f87f6847e43c>chard
>>> Strauss*
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Triangle, NC Embedded Computing mailing listTriEmbed at triembed.orghttp://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>> TriEmbed web site: http://TriEmbed.org
>>>
>>>
>>>
>>> _______________________________________________
>>> Triangle, NC Embedded Computing mailing list
>>> TriEmbed at triembed.org
>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>> TriEmbed web site: http://TriEmbed.org
>>>
>>>
>>
>>
>> --
>> Dave Buster
>>
>> KK4ELT on 2 meters
>>
>> Never look at the trombones, it only encourages them.
>> *Ri
>> <http://t.sidekickopen23.com/e1t/c/5/f18dQhb0S7lC8dDMPbW2n0x6l2B9nMJW7t5XX45vMtjYVQZgwH64R1y4W8r4TLx56dPn8f5RTxgR02?t=http%3A%2F%2Fwww.brainyquote.com%2Fquotes%2Fauthors%2Fr%2Frichard_wagner.html&si=4964982235594752&pi=fce7dc5b-3c23-4cc7-8dbc-3881892046cb>chard
>> Strauss*
>>
>>
>>
>
>
> --
> Dave Buster
>
> KK4ELT on 2 meters
>
> Never look at the trombones, it only encourages them.
> *Ri
> <http://t.sidekickopen23.com/e1t/c/5/f18dQhb0S7lC8dDMPbW2n0x6l2B9nMJW7t5XX45vMtjYVQZgwH64R1y4W8r4TLx56dPn8f5RTxgR02?t=http%3A%2F%2Fwww.brainyquote.com%2Fquotes%2Fauthors%2Fr%2Frichard_wagner.html&si=4964982235594752&pi=6d15af56-f5fe-44f2-93a8-3434dc6cb449>chard
> Strauss*
>
>
>
> _______________________________________________
> Triangle, NC Embedded Computing mailing list
> TriEmbed at triembed.org
> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
> TriEmbed web site: http://TriEmbed.org
>
>


-- 
-------------------------------------------------------------------------------
Carl J. Nobile (Software Engineer)
carl.nobile at gmail.com
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