Battery measurement help
An alternative to adding ADCs is to use a digital switch. One example isthe Maxim 333A, which has 4 DPST switches.· Then use the BS2 to logicallycontrol the switch to select a particular channel.· This is more versatilethen using a multiplexer, because you can control the logic in a non-sequentialmode, which your application requires.
Dennis
Don Bannon wrote:
Dennis
Don Bannon wrote:
[size=-1]HelloGroup--[/size][size=-1]I have a stamp2 alternatelyreading "data out" on two A to D convertors, first one, then the otherand repeat.· After each is read 20 or 30 times, I want to read a thirdADC that measures the battery supply voltage to the circuit.· Thiswill tell me when the battery should be changed.[/size][size=-1]I'mthinking of using another ADC to read this supply voltage and the codeto kick out of the main loop after 20 or 30 readings, read the voltagefrom the third ADC, then go back into the main loop to do another 20 or30 readings.[/size][size=-1]Would any ofyou be able to provide me with a sample of the code needed to do jump outafter 20 or 30, read the third ADC and go back ito the main loop?[/size][size=-1]Hasanyone had experience doing this before from a hardware standpoint?[/size][size=-1]TIAfor any help.·· --Don[/size]
Comments
I have a stamp2 alternately reading "data out" on two A to D convertors, first one, then the other and repeat.· After each is read 20 or 30 times, I want to read a third ADC that measures the battery supply voltage to the circuit.· This will tell me when the battery should be changed.
I'm thinking of using another ADC to read this supply voltage and·the code to kick out of the main loop after 20 or 30 readings, read the voltage from the third ADC, then go back into the main loop to do another 20 or 30 readings.
Would any of you be able to provide me with a sample of the code needed to do jump out after 20 or 30, read the third ADC and go back ito the main loop?
Has anyone had experience doing this before from a hardware standpoint?
TIA for any help.·· --Don
measuring battery voltage
http://www.emesystems.com/BS2misc.htm#RCtime
I recently tried it out and it works perfectly, of course!
Steve
At 12:17 PM 08/24/2000 -0700, you wrote:
> This is more versatile then using a multiplexer, because you can
>control the logic in a non-sequential mode, which your application requires.
>Dennis
>
> Don Bannon wrote: Hello Group-- This will tell me when the battery
>should be changed.I'm thinking of using another ADC to read this supply
>voltage and the code to kick out of the main loop after 20 or 30 readings,
>read the voltage from the third ADC, then go back into the main loop to do
>another 20 or 30 readings.Would any of you be able to provide me with a
>sample of the code needed to do jump out after 20 or 30, read the third ADC
>and go back ito the main loop?Has anyone had experience doing this before
>from a hardware standpoint? --Don
>
power and everything can be done within one loop. Something like:
maxct = 20
ct = 0
READADC:
read chan1
read chan2
ct = ct + 1
if ct < maxct then skipnext
read battchan
ct = 0
SKIPNEXT:
goto READADC
I hope this helps
Vic
_____________________________________________________
Victor Fraenckel - The Windman vfraenc1@n...
KC2GUI
www.windsway.com
Home of the WindReader Electronic Theodolite
Read the WIND
Original Message
From: Dennis O'Leary [noparse][[/noparse]mailto:doleary@hsc.usc.edu]
Sent: Thursday, August 24, 2000 2:17 PM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Battery measurement help
An alternative to adding ADCs is to use a digital switch. One example is the Maxim 333A, which has 4 DPST switches.· Then use the BS2 to logically control the switch to select a particular channel.· This is more versatile then using a multiplexer, because you can control the logic in a non-sequential mode, which your application requires.
Dennis
·
·
Don Bannon wrote:
I var byte 'variable to count
main:
for i= 1 to 30
gosub readADC1
gosub readADC2
next
gosub readBatt
goto main
readADC1:
'put code to read here
'do something with result
return
readADC2:
'put code to read here
'do something with result
return
readBatt:
'put code to read here
'do something with result
return
ACJacques
Don Bannon wrote:
>
> Hello Group--
> I have a stamp2 alternately reading "data out" on two A to D
> convertors, first one, then the other and repeat. After each is read
> 20 or 30 times, I want to read a third ADC that measures the battery
> supply voltage to the circuit. This will tell me when the battery
> should be changed.
> I'm thinking of using another ADC to read this supply voltage and the
> code to kick out of the main loop after 20 or 30 readings, read the
> voltage from the third ADC, then go back into the main loop to do
> another 20 or 30 readings.
> Would any of you be able to provide me with a sample of the code
> needed to do jump out after 20 or 30, read the third ADC and go back
> ito the main loop?
> Has anyone had experience doing this before from a hardware
> standpoint?
> TIA for any help. --Don