类型: IC
作者: engicoder
发布时间: 2019-11-14 12:49:06
更新时间:
2019-11-14 12:49:06
原链接:
https://geekhack.org/index.php?topic=103408.0
Background
Some time ago, I developed
a replacement for the stock, failure prone calculator module
in the Focus FK-9000. This project was essentially a “two”
off that I made for myself and Chyros. You can see the
module on Chyros’ youtube channel in his
“Project F”
at around the
10:30 mark. In the time since the video was posted several people
contacted me expressing interest. I am finally looking at do
a small run of these for those who are interested.
Details
The replacement will be a plug in replacement for the
stock module and include a OLED monochrome graphic display.
(Some minor modification of the the upper case is require
for the display to fit). The module functionality will
include:
/* Identical functionality to stock calculator
including memory
/* Selectable RPN input mode
/*
Persistent clock with date
/* Multiple configurable
settings for clock format and style
/* Eliminates need
for stock battery
/* Compatible with FK-5001 and
FK-9000 that use the single KB/CAL key
Questions for those interested
- Offline availability: The prototype included a rechargeable Li-on battery in order to support using the calculator when the keyboard is not plugged in and/or the pc is not turned on. For packaging simplicity and cost savings, I am thinking about removing the offline capability and using a simple coin cell to retain clock/date information.
Question: Do you consider offline availability
essential even at higher cost/complexity?
2.
Case modification The display used
on the prototype requires that the plastic ridge that
locates the stock display be removed. This modification is
simple to perform and does not change external appearance. I
have made some inquiries in hopes of finding a display that
would not require any modifications and would have a higher
resolution.
Question: Does having to modify
the case turn you off from this solution? Would you be
willing to pay more (~$20) for a display that does not
require case modifications and has higher resolution?
3.
Older FK-5001 and FK-8000 support: Older FK-5001 models used separate KB and CAL buttons to
switch modes and the FK-8000 has a different mounting method
and pin header. The module does not currently support these
keyboards. If you have one of these keyboards and are
interested, let me know. I will investigate adding
support.
Pricing
I do not have
final pricing yet. Pricing is on the conservative side to
avoid surprises. Depending on final configuration, I
estimate the cost to be:
Base module ~ $50-60
Offline
availability ~ +$15
No mod display ~ +$20
If you
are interested please respond or send me a PM with the
answers to the questions. Also let me know what you think
about pricing.