Battery Checker for BS2 via RCTime Function
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Posts: 46,084
Came across a simple approach to testing the 9V battery conditon
powering a BS2. Was wondering if someone can validate it and answer
a simple question. I found it listed in the LOSA as item #035. It
calls for a .01uf "ZTR" Zero Temp Response capacitor. Is this the
same as the 0.01uF 50V poly capacitor that Parallax sells? You can
see a picture by going to Parallax's site, clicking the "products"
tab, then selecting the "capacitors" category under the "Component
Shop" section towards the bottom of the page. I am not familiar with
the "ZTR" term. What does it mean? Appreciate your help!
Steve
powering a BS2. Was wondering if someone can validate it and answer
a simple question. I found it listed in the LOSA as item #035. It
calls for a .01uf "ZTR" Zero Temp Response capacitor. Is this the
same as the 0.01uF 50V poly capacitor that Parallax sells? You can
see a picture by going to Parallax's site, clicking the "products"
tab, then selecting the "capacitors" category under the "Component
Shop" section towards the bottom of the page. I am not familiar with
the "ZTR" term. What does it mean? Appreciate your help!
Steve
Comments
>powering a BS2. Was wondering if someone can validate it and answer
>a simple question. I found it listed in the LOSA as item #035. It
>calls for a .01uf "ZTR" Zero Temp Response capacitor. Is this the
>same as the 0.01uF 50V poly capacitor that Parallax sells? You can
>see a picture by going to Parallax's site, clicking the "products"
>tab, then selecting the "capacitors" category under the "Component
>Shop" section towards the bottom of the page. I am not familiar with
>the "ZTR" term. What does it mean? Appreciate your help!
Hi Steve,
Beau's approach is fine (of course!), and the 0.01 50 v poly capacitor
would work fine. I have a similar RCtime circuit and performance data at:
<http://www.emesystems.com/BS2misc.htm#battery voltage & RCtime>
Mylar or other plastic film capacitors are called for because they are
relatively stable. Do _not_ use one of the small ceramic (monolythic)
capacitors that are often used for power supply bypassing--they have a
relatively large temperature dependence.
-- Tracy Allen
electronically monitored ecosystems
http://www.emesystems.com
site the same time as the other one! I was unbelievably impressed at
all the great insight and clarity in which you presented your
information!
Your approach is more consistent with the materials covered in the
StampsInClass curriculum, which is why I was so intrigued by the
simplicity of Beau's method.
Thanks so much for the response. You can feel good that the time and
effort you put into your web pages is very much appreciated by me and
others!
Again, thanks!
Steve
--- In basicstamps@egroups.com, Tracy Allen <emesys@c...> wrote:
> >Came across a simple approach to testing the 9V battery conditon
> >powering a BS2. Was wondering if someone can validate it and
answer
> >a simple question. I found it listed in the LOSA as item #035.
It
> >calls for a .01uf "ZTR" Zero Temp Response capacitor. Is this the
> >same as the 0.01uF 50V poly capacitor that Parallax sells? You
can
> >see a picture by going to Parallax's site, clicking the "products"
> >tab, then selecting the "capacitors" category under the "Component
> >Shop" section towards the bottom of the page. I am not familiar
with
> >the "ZTR" term. What does it mean? Appreciate your help!
>
> Hi Steve,
>
> Beau's approach is fine (of course!), and the 0.01 50 v poly
capacitor
> would work fine. I have a similar RCtime circuit and performance
data at:
>
> <http://www.emesystems.com/BS2misc.htm#battery voltage & RCtime>
>
> Mylar or other plastic film capacitors are called for because they
are
> relatively stable. Do _not_ use one of the small ceramic
(monolythic)
> capacitors that are often used for power supply bypassing--they
have a
> relatively large temperature dependence.
>
> -- Tracy Allen
> electronically monitored ecosystems
> http://www.emesystems.com
Can the same method be used to monitor the pack of four AA 1.5v cells
I use for the servos driving my wheeled robot ?
Gordon Endersby
Newbie robot builder.
Original Message
From: sjoblin@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=2um2AMRExEI2OsQD9CKm7ITUfDeHfZ4Nza05ukc3wi2uxCt5NrNwpyQpWLyWe715H1evzaF1Wd6k1yM]sjoblin@a...[/url
Sent: 18 November 2000 15:44
To: basicstamps@egroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Battery Checker for BS2 via RCTime Function
Funny that you of all people responded. I actually cam across your
site the same time as the other one! I was unbelievably impressed at
all the great insight and clarity in which you presented your
information!
Your approach is more consistent with the materials covered in the
StampsInClass curriculum, which is why I was so intrigued by the
simplicity of Beau's method.
Thanks so much for the response. You can feel good that the time and
effort you put into your web pages is very much appreciated by me and
others!
Again, thanks!
Steve
--- In basicstamps@egroups.com, Tracy Allen <emesys@c...> wrote:
> >Came across a simple approach to testing the 9V battery conditon
> >powering a BS2. Was wondering if someone can validate it and
answer
> >a simple question. I found it listed in the LOSA as item #035.
It
> >calls for a .01uf "ZTR" Zero Temp Response capacitor. Is this the
> >same as the 0.01uF 50V poly capacitor that Parallax sells? You
can
> >see a picture by going to Parallax's site, clicking the "products"
> >tab, then selecting the "capacitors" category under the "Component
> >Shop" section towards the bottom of the page. I am not familiar
with
> >the "ZTR" term. What does it mean? Appreciate your help!
>
> Hi Steve,
>
> Beau's approach is fine (of course!), and the 0.01 50 v poly
capacitor
> would work fine. I have a similar RCtime circuit and performance
data at:
>
> <http://www.emesystems.com/BS2misc.htm#battery voltage & RCtime>
>
> Mylar or other plastic film capacitors are called for because they
are
> relatively stable. Do _not_ use one of the small ceramic
(monolythic)
> capacitors that are often used for power supply bypassing--they
have a
> relatively large temperature dependence.
>
> -- Tracy Allen
> electronically monitored ecosystems
> http://www.emesystems.com