Post Reply 
stopwatch features on calculators
09-10-2018, 08:14 PM
Post: #21
RE: stopwatch features on calculators
TI-65 has a stopwatch with 1 sec resolution and capable as I can remember to store timing values and can count down also. BTW TI-65 has very nice features (like 4 type time/degrees display), unfortunately really slow machine. On my TI-65 the bottom keys has some problem and not responding now.

Csaba
Find all posts by this user
Quote this message in a reply
09-11-2018, 04:11 AM
Post: #22
RE: stopwatch features on calculators
(09-10-2018 11:10 AM)Robert VM Wrote:  WP34s !!

Because of the HP-55 by the way.
Find all posts by this user
Quote this message in a reply
09-11-2018, 07:35 AM
Post: #23
RE: stopwatch features on calculators
Here is a clock (or timer) program for the HP-25. It has a resolution of approximately 1 second and can be made fairly accurate by modifying the value stored in register 0. It could probably be adapted to work on any HP programmable model that has a PAUSE function (that lasts approximately 1 second).

Clock Program (HP-25):
01 RCL 0
02 STO+1
03 RCL 1
04 -->H.MS
05 PAUSE
06 GTO 01


Setup:
FIX 4

0.0001 (adjust this number up or down to provide an average of 1 second accuracy)
-->H
STO 0

(for a clock, enter the current time as HH.MMSS, or enter 0 for a timer)
-->H
STO 1

GTO 00
R/S to start or stop
Find all posts by this user
Quote this message in a reply
09-11-2018, 10:04 AM
Post: #24
RE: stopwatch features on calculators
I'm still using the FX-8100 since 1980 as stopwatch, timer and alarm clock. A very nice calculator with fast operation and responsive keys.
The range of stopwatch and timer is up to 10 hours with a resolution of 1/100 sec. The stopwatch is circular with one lap and the timer
can be set to once or recurrent mode. The power consumption is around 5µA even while the running stopwatch or timer.
http://mycalcdb.free.fr/main.php?l=0&id=5456

Calculator Benchmark
Find all posts by this user
Quote this message in a reply
09-29-2018, 07:46 PM
Post: #25
RE: stopwatch features on calculators
I have to say that after having (re)discovered multistopwatch and dived in to it a bit more (DavidM quality! impressive), one of my hp50g has little rest since a couple of weeks weeks. I am using it to get a trend how much time I use for some routine tasks, to try to plan better the day/week.

Yes I know I could be efficient, start the timer, then quit the program, then enter the program and stop the timer, but that's overhead that sometimes is not in my mind so the 50g mostly runs adding fractions of a seconds without pauses.

Wikis are great, Contribute :)
Find all posts by this user
Quote this message in a reply
09-29-2018, 10:48 PM
Post: #26
RE: stopwatch features on calculators
(09-29-2018 07:46 PM)pier4r Wrote:  Yes I know I could be efficient, start the timer, then quit the program, then enter the program and stop the timer, but that's overhead that sometimes is not in my mind so the 50g mostly runs adding fractions of a seconds without pauses.

Leaving the timer console running should be OK so long as you've got the 50g connected to external power. I've never tried that scenario just using battery power, but it should deplete the batteries at the same rate as any other continuously-running application.

You could also consider creating some simple RPL programs to start/stop/split given timers, as all of the stopwatch functions are programmable.
Find all posts by this user
Quote this message in a reply
09-30-2018, 05:19 PM
Post: #27
RE: stopwatch features on calculators
Yes the 50g is fixed to the USB in any case. I use the batteries only for switching calculators.

I saw also the commands, I didn't use them yet, as the UI of the stopwatch is great (maybe I will have to automate the export procedure). I used multitimer on android massively, but for a couple of weeks I am just using multistopwatch. Pretty neat.

It could be a project to make a similar thing on other popular calculators / OSes (newRPL) .

Wikis are great, Contribute :)
Find all posts by this user
Quote this message in a reply
10-02-2018, 01:19 PM
Post: #28
RE: stopwatch features on calculators
(09-11-2018 07:35 AM)Steve Simpkin Wrote:  Here is a clock (or timer) program for the HP-25. It has a resolution of approximately 1 second and can be made fairly accurate by modifying the value stored in register 0. It could probably be adapted to work on any HP programmable model that has a PAUSE function (that lasts approximately 1 second).

Clock Program (HP-25):
01 RCL 0
02 STO+1
03 RCL 1
04 -->H.MS
05 PAUSE
06 GTO 01


Setup:
FIX 4

0.0001 (adjust this number up or down to provide an average of 1 second accuracy)
-->H
STO 0

(for a clock, enter the current time as HH.MMSS, or enter 0 for a timer)
-->H
STO 1

GTO 00
R/S to start or stop

My HP25 was +1 second per minute with the default delay (0.0001). A bit of tweaking and This "clock" was +1 sec per hour. Big fun. Thanks for sharing.

Dave
Find all posts by this user
Quote this message in a reply
Post Reply 




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