anybody knows how to design a calculator??? - Electronic Circuits Projects Diagrams Free

eleanor · 11th August 2005, 06:16 AM

good day to all!!!

anybody there knows how to design a calculator????
my project here is to design a 2 seven segment display LED using a hexadecimal matrix design...the problem is i dont know how...the design should have a primary encoder to determine which number will appear if u happen to pressed 2 keys....then i need to design a 2 memory segment for the 2 seven segment display...........and the design must be all in LOGIC CIRCUITS......THE SIMPLEST DESIGN THE BETTER

THANKS

aibelectronics · 11th August 2005, 07:37 AM

I think the easiest way to design a calculator is to buy a calculator!!

Myself, I've often wondered about that. It should use so many chips and so many memory elements: adders, integrators...My God!

So that put me off. These chips might even be difficult to find and if you should opt for discrete components, I wouldn't tell you you're going to end up with a ridiculously complicated & bulky circuit.

Hey, that's just my idea. Luckily someone would guide you to a schematc. :wink:

Someone Electro · 11th August 2005, 09:27 AM

Simple use an microcontroler.So you allredy have your computer all you need to add is the human machine interface(Display and keys)

Just stuck on an matrix keypad and an 7 segment or even an LCD.

PIC MCUs from microchip cost from $1 to $20 (depends what kind of it it is) You can get them fro free too trough the samples servise.

panic mode · 11th August 2005, 06:05 PM

how many functions? add, subtract, multiply, divide, power, percent, log, ln, rooth....

tansis · 12th August 2005, 05:44 PM

Quote:

the design must be all in LOGIC CIRCUITS......THE SIMPLEST DESIGN THE BETTER

I applaud your courage, for none but the brave
venture into the realm of DIY discrete calaculators.

http://www.cs.ubc.ca/~hilpert/eec/ca...skTechSum.html

and for the truly fearless, schematics for
the Apollo guidance computer can also be found on web.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

11th August 2005, 06:16 AM	(permalink)
eleanor	anybody knows how to design a calculator??? good day to all!!! anybody there knows how to design a calculator???? my project here is to design a 2 seven segment display LED using a hexadecimal matrix design...the problem is i dont know how...the design should have a primary encoder to determine which number will appear if u happen to pressed 2 keys....then i need to design a 2 memory segment for the 2 seven segment display...........and the design must be all in LOGIC CIRCUITS......THE SIMPLEST DESIGN THE BETTER THANKS

11th August 2005, 07:37 AM	(permalink)
aibelectronics	Calculator I think the easiest way to design a calculator is to buy a calculator!! Myself, I've often wondered about that. It should use so many chips and so many memory elements: adders, integrators...My God! So that put me off. These chips might even be difficult to find and if you should opt for discrete components, I wouldn't tell you you're going to end up with a ridiculously complicated & bulky circuit. Hey, that's just my idea. Luckily someone would guide you to a schematc. :wink: __________________ Everybody can but not everybody will.

11th August 2005, 09:27 AM	(permalink)
Someone Electro	Simple use an microcontroler.So you allredy have your computer all you need to add is the human machine interface(Display and keys) Just stuck on an matrix keypad and an 7 segment or even an LCD. PIC MCUs from microchip cost from $1 to $20 (depends what kind of it it is) You can get them fro free too trough the samples servise. __________________ Il give you shocking experience.

11th August 2005, 06:05 PM	(permalink)
panic mode	how many functions? add, subtract, multiply, divide, power, percent, log, ln, rooth....