Hi guys,
I am looking to build a multi meter using 8051, I know that I can use an AD converter to display the voltage but what can I do to measure the resistance and the current?
Can anyone refer a link or suggest the easiest way to do this?
So far, I have figured that I can put the AD on the bus but would I need a HEX to decimal decoder on the bus to display the voltage? or shouldn't it be a binary to decimal decoder?
what a/d converter are u using ? some output strait binary others compliment the output .
u may or may not have to do some convertion in your 8051 program to get the output to straight binary , then u can use a binary to seven segment decoder..or you could do it all in the program by connecting the outputs of the 8051 directly to the segments of the display.
what a/d converter are u using ? some output strait binary others compliment the output .
u may or may not have to do some convertion in your 8051 program to get the output to straight binary , then u can use a binary to seven segment decoder..or you could do it all in the program by connecting the outputs of the 8051 directly to the segments of the display.
Well, I am still trying to think my idea through and come up with a schematic.....
My goal is to make the 7 seg led be as spontaneous as possible with minimal circuit required, so I would not want to use an 8051 if it is not necessary.
So far, I am thinking of just using a 8 bit AD since I will be measuring less than 100V and then connect the 8 bit output straight to the binary to decimal decoder to the 3 digit 7 seg display. Any AD you would like to recommand, I think I will just pick some 8 bit AD from TI since they offer free samples
You'll find an alphanumeric LCD display quite easy to drive, more visible in bright light, lower power, and far simpler to wire up. You sure you want an LED?
You'll find an alphanumeric LCD display quite easy to drive, more visible in bright light, lower power, and far simpler to wire up. You sure you want an LED?
You'll find an alphanumeric LCD display quite easy to drive, more visible in bright light, lower power, and far simpler to wire up. You sure you want an LED?
Almost all LCD text modules use the Hitachi chip set, so as long as it's one of those it doesn't matter much one you use - I've used various different makes and models, you simple connnect it up and it works with the existing software (as it's written for the same chip set). The only difference I have found is in the contrast setting, you usually have to adjust that for different ones.
Yes, that should be fine, I've used many LCD modules removed from other equipment.
The one in the photo in my tutorials has 16 connections because the other two are used for back lighting - which isn't actually fitted on the board in the picture, but some LCD's have the unused connections there anyway.