<div dir="ltr">Dave,<div><br></div><div>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.</div><div><br></div><div>~Carl</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Oct 27, 2015 at 7:48 PM, Dave Buster via TriEmbed <span dir="ltr"><<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">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.<div><br></div><div>db</div><img src="http://t.sidekickopen23.com/e1t/o/5/f18dQhb0S7ks8dDMPbW2n0x6l2B9gXrN7sKj6v4f8fjW1q7dh42BFXSHW5vg7Q82zlZNzW69xng71k1H6H0?si=4964982235594752&pi=6d15af56-f5fe-44f2-93a8-3434dc6cb449" style="display:none!important" height="1" width="1"></div><div class="gmail_extra"><br><div class="gmail_quote"><span class="">On Tue, Oct 27, 2015 at 7:47 PM, Dave Buster <span dir="ltr"><<a href="mailto:dave.buster@gmail.com" target="_blank">dave.buster@gmail.com</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><div dir="ltr"><div>Thanks, Pete.</div><div><br></div>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.<div><br></div><div>One final request- the circuit board and battery need to fit in a PVC pipe. (~ 1 inch inside diameter)</div><div><br></div><div>Once I get this thing built, I'll be happy to give a presentation on a very crazy idea.</div><div><br></div><div>db</div></div></span><div class="gmail_extra"><br><div><div class="h5"><div class="gmail_quote"><span>On Tue, Oct 27, 2015 at 7:09 PM, Pete Soper via TriEmbed <span dir="ltr"><<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><span>
This is exactly the right list. How high a voltage for how long (and
how often) and at what current?<br>
<br>
-Pete<div><div><br>
<br>
<div>On 10/27/2015 06:55 PM, Dave Buster via
TriEmbed wrote:<br>
</div>
</div></div></span><blockquote type="cite"><span><div><div>
<div dir="ltr">
<div>Hi- </div>
<div>I'm a long-time lurker on this email, but I'm not active.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>sigh. This is embarrassing..</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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?</div>
<div><br>
</div>
<div>Anyone want to volunteer to help a life-long learner?</div>
<div><br>
</div>
<div>Here is an email account I don't use very much, but I'll be
checking it:</div>
<div><br>
</div>
<div><a href="mailto:dave@tritonsharksignal.com" target="_blank">dave@tritonsharksignal.com</a></div>
<div><br>
</div>
<div>Also, if this is not appropriate for this email thread, my
apologies.</div>
<div><br>
</div>
<div>thanks!</div>
<div><br>
</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div>
<div dir="ltr">
<div><font face="Verdana"><span>Dave Buster</span></font></div>
<div><font face="Verdana"><span><br>
</span></font></div>
<div><font face="Verdana"><span>KK4ELT on 2 meters</span></font></div>
<div><font face="Verdana"><span></span></font> </div>
<div><font face="Verdana"><span>Never look at the trombones,
it only encourages them.</span><br>
<span><b><font color="#0000cc">R<a href="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" target="_blank">i</a>chard Strauss</font></b></span></font><br>
<br>
<br>
</div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
</div></div></span><span><pre>_______________________________________________
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</pre>
</span></blockquote>
<br>
</div><span>
<br>_______________________________________________<br>
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<br></span></blockquote></div><br><br clear="all"><span><div><br></div>-- <br><div><div dir="ltr"><div><font face="Verdana"><span>Dave Buster</span></font></div><div><font face="Verdana"><span><br></span></font></div><div><font face="Verdana"><span>KK4ELT on 2 meters</span></font></div>
<div><font face="Verdana"><span></span></font> </div>
<div><font face="Verdana"><span>Never look at the trombones, it only encourages them.</span><br><span><b><font color="#0000cc">R<a href="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" target="_blank">i</a>chard Strauss</font></b></span></font><br><br><br></div></div></div>
</span></div></div></div>
</blockquote></div><div><div class="h5"><br><br clear="all"><div><br></div>-- <br><div><div dir="ltr"><div><font face="Verdana"><span>Dave Buster</span></font></div><div><font face="Verdana"><span><br></span></font></div><div><font face="Verdana"><span>KK4ELT on 2 meters</span></font></div>
<div><font face="Verdana"><span></span></font> </div>
<div><font face="Verdana"><span>Never look at the trombones, it only encourages them.</span><br><span><b><font color="#0000cc">R<a href="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" target="_blank">i</a>chard Strauss</font></b></span></font><br><br><br></div></div></div>
</div></div></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">-------------------------------------------------------------------------------<br>Carl J. Nobile (Software Engineer)<br><a href="mailto:carl.nobile@gmail.com" target="_blank">carl.nobile@gmail.com</a><br>-------------------------------------------------------------------------------</div>
</div>