# Re: Need a calculator that knows about coulombs

```I don't believe I did this.

On Tue, Dec 29, 2015 at 7:56 PM, Joel Rees <joel.rees@gmail.com> wrote:
> On Tue, Dec 29, 2015 at 6:12 PM, Gene Heskett <gheskett@shentel.net> wrote:
>>
>> A paste of what I entered:
>>
>> define vc(vs,t,r,c) {
>> return vs * (1-e(-t/(r*c)))
>> }
>> for ( i=0.0; i<5.0; i += 0.1 ) { print i, ":", vc(120,i,83,.01 ),"\n" } 0:0
>
> Sorry I missed that. Probably should stay off the list when I'm in a
> hurry. Rip the 0:0 off the end and see how that works:
>
> for ( i=0.0; i<5.0; i += 0.1 ) { print i, ":", vc(120,i,83,.01 ),"\n" }
>
> Or you could unpack it  bit:
>
> for ( i=0.0; i<5.0; i += 0.1 ) {
>   print i, ":", vc(120,i,83,.01 ),"\n"
> }
>
> The units should be volts, seconds, ohms, and farads. I'm not positive
> about farads, but the units were set up so that this equation would
> work without conversion, as I recall.
>
> Adding current and power should look something like
>
> scale=5;
> vs = 120;
> r = 100000;
> c = .00001;
> for ( t=0.0; t<5.0; t += 0.1 ) {

vc = vc(vs,t,r,c );

>   vr = vs - vc;
>   a = vr / r;
>   p = vr * a;
>   print"t: ", t, "  vc:", vc(vs,t,r,c ), "  a: ", a, "  p: ", p,  "\n"
> }
>
>
> --
> Joel Rees
>
> Be careful when you look at conspiracy.
> Arm yourself with knowledge of yourself, as well:
> http://reiisi.blogspot.jp/2011/10/conspiracy-theories.html

scale=5;
vs = 120;
r = 100000;
c = .00001;
for ( t=0.0; t<5.0; t += 0.1 ) {
vc = vc(vs,t,r,c );
vr = vs - vc;
a = vr / r;
p = vr * a;
print"t: ", t, "  vc:", vc(vs,t,r,c ), "  a: ", a, "  p: ", p,  "\n"
}

--
Joel Rees

Be careful when you look at conspiracy.
Arm yourself with knowledge of yourself, as well:
http://reiisi.blogspot.jp/2011/10/conspiracy-theories.html

```