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Hardware emulating the Classic HP Calculators

Build a fun, educational easy to build calculator.

Features:

All Through Hole parts. (easy to handle and solder)
Runs about 4 to 5 times faster than the original (voyager series).
Memory registers: same memory as the original.
Continuous memory (Memory is not lost when calculator is turn off).
Auto power off
Runs on a single ATMEGA328 8 bit microcontroller running @ 8MHz (same as Arduino Uno)
Speaker for audible keypress feedback
192x64 lcd display
Display Backlight
Has a real time clock. (Uses a 32.768KHz crystal)
Uses a single CR2032 3V battery.
Power consumption: 1µA off, 350µA idle, 3mA working (this is with speaker and backlight off)
Can run any of the Voyager series and HP41C calculators, with the appropriate firmware.
In programming mode, the names of the keys are displayed on the header of the display.
It's a bit smaller than the original - 4.2" x 2.67" (10.668 x 6.7818 cm).

More info at voyager.

You will receive the following:

Part	QTY	Value	Description
C1, C2	2	0.1µf	Decoupling Capacitor
C3	1	0.1µf	Speaker impedance
U1	1	ATMEGA328P	Preprogrammed Microcontroller
J1	1	6 pin female header	SPI Programing header
BAT	1	Battery Holder	CR2032 Battery Holder
SPK	1	BUZZER	Speaker
XTAL	1	Clock Crystal 32.768kHz	Clock
R1	1	10KΩ	Reset pullup resistor
R2	1	10Ω	LCD backlight resistor
BTN's	39	6x6mm tactile switch	Key buttons, (11mm tall)
RST	1	6x3.5 mm tactile button	Reset button
PCB	1	PCB	PCB
DISP	1	Display 192X64 LCD	Display
	1	9 pin male header	For Mounting Display
	1	double sided tape	to attach display to microcontroller.
	4	rubber feet	rubber feet
	1	Bumper	3D printed bumper
	1	Bat Holder	3D printed Battery Holder
	2	Panel	Top and bottom panels
	1	hardware Kit	brass posts & screws

Panels are made from standard FR-4 PCB. Top panel has ENIG finish.

NOTES:

This is a Kit, you have to build it yourself. Basic soldering skills are required!

Battery not included.

To upload new firmware you will need a AVR SPI programmer. Such as the usbasp. And you will need to modify the cable, or purchase the AVR Programming adaptor. More info at voyager.