Post Reply 
NewRPL announciator question
05-05-2023, 01:39 PM (This post was last modified: 05-05-2023 01:44 PM by SammysHP.)
Post: #2
RE: NewRPL announciator question
AFAIK that annunciator is a low battery warning. I have the same problem with my calculator and already reported it to the developers a long time ago. The ADC values have wrong thresholds, but for some reason I've never continued to fix them. Maybe because I got lost in the code somewhere. IIRC I asked the developer how I can read the ADC value, but didn't get a helpful response.

Edit:
Quote:2022-01-11

Hi Claudio,

I've just noticed that the low battery annunciator on my HP 39gs with
newRPL is on, but the batteries (NiMH) are still at 1.25 V each (5 V
total). IMHO that's still a very acceptable level.

From looking at the code it doesn't seem there is a command to print
the current voltage or ADC value and also nothing for runtime
calibration. Do you think it would be feasible to add both:

1. a command to put the current voltage or ADC value on the stack
2. a hidden variable that can be used to calibrate the voltage reading
(offset to the hardcoded thresholds)

Got a reply that it works as intended. Under load the battery voltage should drop. I was also told to wait until the annunciator starts blinking. My response:

Quote:I've just tested it under load (NUMINT) using my oscilloscope. There was
almost no drop, only 0.01 V. Eneloop have a pretty good discharge curve.
A method to get the current voltage or raw value would be great
nevertheless.

No further messages are recorded.
Visit this user's website Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
NewRPL announciator question - nickapos - 05-05-2023, 06:38 AM
RE: NewRPL announciator question - SammysHP - 05-05-2023 01:39 PM



User(s) browsing this thread: 1 Guest(s)