My Focus FK-9000 and 5001 drop-in replacement OLED calculator is done!

kelvinhall05

05 Nov 2021, 12:00

Read the description if you want more info.

EDIT: YT still processing HD version so will look a bit chunky now, sorry.

inozenz

05 Nov 2021, 12:37

kelvinhall05 wrote:
05 Nov 2021, 12:00

Read the description if you want more info.

EDIT: YT still processing HD version so will look a bit chunky now, sorry.
warning if you watch this, turn down the volume to 0 its pretty much aids for the ears

User avatar
hellothere

05 Nov 2021, 17:17

First, I like the mod. A lot.

As I'm being sorely tempted to buy another Focus w/calculator, I have questions:

* Are you planning on making a step-by-step video/post?
* Are you planning on selling these?
* My "killer app" for one of these would be a clock. Can that be done/how hard?

kelvinhall05

05 Nov 2021, 17:49

hellothere wrote:
05 Nov 2021, 17:17
First, I like the mod. A lot.

As I'm being sorely tempted to buy another Focus w/calculator, I have questions:

* Are you planning on making a step-by-step video/post?
* Are you planning on selling these?
* My "killer app" for one of these would be a clock. Can that be done/how hard?
Probably not to the first two. Blame your fellow boomer-mindset DTers for ruining any chance of me wanting to share $500 and many months of work with you.

A clock is next on my list as the "idle mode" instead of just the Keypro logo (or any desired graphic, really), but it would be difficult as you can't exactly network sync this; to set time, you'd have to manually put a future time in the code, then calculate time you flash it at so when it's done flashing and starts telling the time, it's accurate. Then repeat that every month since I doubt a Pro Micro has a very accurate clock source. Oh, I also removed the battery, and although it wouldn't exactly be hard to add it, it would need to be done so you aren't repeating the procedure every time the keyboard loses power.

TL;DR: Yes, a clock is possible, yes I'll try it, but it might not be very good.

kelvinhall05

05 Nov 2021, 17:50

inozenz wrote:
05 Nov 2021, 12:37
kelvinhall05 wrote:
05 Nov 2021, 12:00

Read the description if you want more info.

EDIT: YT still processing HD version so will look a bit chunky now, sorry.
warning if you watch this, turn down the volume to 0 its pretty much aids for the ears
Hey, I spent all of last night on this :oops:

kelvinhall05

06 Nov 2021, 14:40

hellothere wrote:
05 Nov 2021, 17:17
First, I like the mod. A lot.

As I'm being sorely tempted to buy another Focus w/calculator, I have questions:

* Are you planning on making a step-by-step video/post?
* Are you planning on selling these?
* My "killer app" for one of these would be a clock. Can that be done/how hard?
Actually, follow up on the comment I made yesterday, dunno why I didn't realize it at the time but I could easily implement a clock-setting function into the calc itself, so just flash once and set every time you need to, no need to reflash. So I'll def give that a shot when I've got time and motivation.

SK-8K

06 Nov 2021, 16:07

What about an external RTC that the Pro Micro could get the time from occasionally? I found a chip that looks interesting
DS1315.pdf
(643.85 KiB) Downloaded 70 times

kelvinhall05

06 Nov 2021, 21:44

SK-8K wrote:
06 Nov 2021, 16:07
What about an external RTC that the Pro Micro could get the time from occasionally? I found a chip that looks interesting
DS1315.pdf
https://press-f-to-pay-for-it-this-ti.me/

User avatar
hellothere

08 Nov 2021, 18:34

kelvinhall05 wrote:
06 Nov 2021, 21:44
SK-8K wrote:
06 Nov 2021, 16:07
What about an external RTC that the Pro Micro could get the time from occasionally? I found a chip that looks interesting
DS1315.pdf
https://press-f-to-pay-for-it-this-ti.me/
Risky click.

Wait. Is this r/MK?

:mrgreen:

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