UPS or Battery?
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Posts: 46,084
I'm working on a watchdog type system that will be keeping tack of a
number of things at a remote location. One of the things we watch for
is power outage. It's no problem to check to see if the power is on,
but the BSII needs to keep running when it is out so it can call my
pager.
My first thought was a small computer UPS, even a small one should
keep a Stamp running for a long long time. This though seems like
over kill, I really only need an hour or so of run time after the
power is out. Is there a simple way to trickle charge a small 6 to 9
volt battery and use it for powering the Stamp at the same time? In a
sense a very small homemade UPS.
Thanks
Mike
--
Pisani Graphics Inc.
Kimberly WI 54136
920-730-0014
number of things at a remote location. One of the things we watch for
is power outage. It's no problem to check to see if the power is on,
but the BSII needs to keep running when it is out so it can call my
pager.
My first thought was a small computer UPS, even a small one should
keep a Stamp running for a long long time. This though seems like
over kill, I really only need an hour or so of run time after the
power is out. Is there a simple way to trickle charge a small 6 to 9
volt battery and use it for powering the Stamp at the same time? In a
sense a very small homemade UPS.
Thanks
Mike
--
Pisani Graphics Inc.
Kimberly WI 54136
920-730-0014
Comments
They make a lot of neat little modules for the security industry.
Look at the small burgular alarm power supply boards. They provide float
charging of backup battery and alarm condition of primary power failure.
Cheers,
Phil
D1&R1 provide the charging current.
D1 prevent the battery from discharing backwards following
the maine failure.
T1,D3,R2&R3 to produce low voltage cut-off to prevent deep
discharge of B1.
15V_______
| T1
| D1 e c +5V
---Bridge
>
o o--[noparse][[/noparse]7805]--->>>
| | | | | | o | |
0V__|____| | > | > |b | |
| | >R1 | >R2 | | |
| | > | > | | |
| ____| |-->-- |--^^^-- | _|_+
| + _|_ _|_ | D2 | R3 | ---c3
| C1--- ---C2 __|__ | | |
| | | --- B1 / \D3 zener | |
| | | | | | |
|_____|____|______|_________|_______________|___|___
0V
PIC UPS
T1 2N3702 pnp
D3 5.6V zener
D1&D2 1N4001
R1&R2 1K
R3 10K
C1 1000uF
C2 100nF
C3 47uF
B1 9V Ni-Cd battery
Regards
Mohamed Refky
>From: Mike Davey <mdavey@n...>
>Reply-To: basicstamps@yahoogroups.com
>To: basicstamps@yahoogroups.com
>Subject: [noparse][[/noparse]basicstamps] UPS or Battery?
>Date: Mon, 30 Jul 2001 14:08:42 -0500
>
>I'm working on a watchdog type system that will be keeping tack of a
>number of things at a remote location. One of the things we watch for
>is power outage. It's no problem to check to see if the power is on,
>but the BSII needs to keep running when it is out so it can call my
>pager.
>
>My first thought was a small computer UPS, even a small one should
>keep a Stamp running for a long long time. This though seems like
>over kill, I really only need an hour or so of run time after the
>power is out. Is there a simple way to trickle charge a small 6 to 9
>volt battery and use it for powering the Stamp at the same time? In a
>sense a very small homemade UPS.
>
>Thanks
>Mike
>--
>Pisani Graphics Inc.
>Kimberly WI 54136
>920-730-0014
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
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D1&R1 provide the charging current.
D1 prevent the battery from discharing backwards following
the maine failure.
T1,D3,R2&R3 to produce low voltage cut-off to prevent deep
discharge of B1.
15V_______
| T1
| D1 e c +5V
---Bridge
>
o o--[noparse][[/noparse]7805]--->>>
| | | | | | o | |
0V__|____| | > | > |b | |
| | >R1 | >R2 | | |
| | > | > | | |
| ____| |-->-- |--^^^-- | _|_+
| + _|_ _|_ | D2 | R3 | ---c3
| C1--- ---C2 __|__ | | |
| | | --- B1 / \D3 zener | |
| | | | | | |
|_____|____|______|_________|_______________|___|___
0V
PIC UPS
T1 2N3702 pnp
D3 5.6V zener
D1&D2 1N4001
R1&R2 1K
R3 10K
C1 1000uF
C2 100nF
C3 47uF
B1 9V Ni-Cd battery
Regards
Mohamed Refky
>From: Mike Davey <mdavey@n...>
>Reply-To: basicstamps@yahoogroups.com
>To: basicstamps@yahoogroups.com
>Subject: [noparse][[/noparse]basicstamps] UPS or Battery?
>Date: Mon, 30 Jul 2001 14:08:42 -0500
>
>I'm working on a watchdog type system that will be keeping tack of a
>number of things at a remote location. One of the things we watch for
>is power outage. It's no problem to check to see if the power is on,
>but the BSII needs to keep running when it is out so it can call my
>pager.
>
>My first thought was a small computer UPS, even a small one should
>keep a Stamp running for a long long time. This though seems like
>over kill, I really only need an hour or so of run time after the
>power is out. Is there a simple way to trickle charge a small 6 to 9
>volt battery and use it for powering the Stamp at the same time? In a
>sense a very small homemade UPS.
>
>Thanks
>Mike
>--
>Pisani Graphics Inc.
>Kimberly WI 54136
>920-730-0014
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp