EEVblog #130 - The uCalc Credit Card Scientific Calculator / Computer

Dave describes the design of his open source hardware uCalc credit card sized calculator / computer.
Specifications:
PIC 24F 16 bit Processor, 256KB Flash, 16KB SRAM, 64KB serial flash user memory, 3-Axis tilt sensor, Micro SD card, capacitive touch sensing keypad, 128x64 dot matrix display.

Category:

Science & Technology

Tags:

• open
• source
• hardware
• credit
• card
• scientific
• calculator
• computer
• rpn
• algebraic
• pic
• microchip
• 24F
• icsp
• axis
• tilt
• sensor
• design
• construction
• pcb
• layout
• silkscreen

[effee1000]

DAVE: Is this on the market, can anyone buy one? I'm partial to my HP-50g but it's kind of cute and, being so compact, might come in handy.

[EEVblog]

@effee1000 No, sorry, it's still just a prototype.

[fax8]

David, you didn't say anything about the accelerometer you are putting there.. any info on it? I'm into motion sensing, check out my channel for more info.

[EEVblog]

@fax8 Just a bog standard 3 axis low-g accelerometer available from a dozen vendors.

[eddy66t6]

Hello,

Pardon me, but what do you mean by floodfill?

[EEVblog]

@eddy66t6 A solid plane of copper. Often known as a copper "pour"

[dylanpalmediy]

I want one.

[Kilohercas]

where are you getting pcb and at what price, that looks so good :(

[samgab]

Wow, Dave, I am very impressed with this!

[mantaz111]

What chip do you using for tilt sensor?

[gwagenknecht10]

Micro SD, Sweet!

[TheOneToxic]

that is insane

Dave, i have never seen something so sexy as that uCalc. It is beautifully designed, just....i cant describe it.

Well done!!!!!!

[ekriirke]

I remember having a creditcard calculator 15 years ago, not exactly programmable beyond some contact infos, not scientific - about as thick as a CR2032

[SarahC2]

Dave is cute! ^-^