http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. Thu, 20 Nov 2008 19:33:53 -0800 http://backend.userland.com/rss092 Firstly id like to say i know nothing about microcontrollers etc...so my question may sound really basic and stupid, so I'll apologise up front.Basica <noauthor@nospam.com> http://www.8051projects.net/forum-t10195.html Hello Stu,Welcome to our forum !No, you don't have to pay us for our time and efforts !Yes, your project can be implemented, from what i understand fr Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html Arun,thanks for your reply,I am not particular at all about what I use to do it. As long as it works, lol.I probably was not real clear in my descrip SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html Hello Stu, your second post explains what you intend to do. but an LCD display cannot be inserted just like a plug into a running circuit, by doing Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html Arun,This solution would be perfect, I assumed I would need some sort of circuit to go along with the LCD's rather than just plugging them in.If it is SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html The lcd unit can be done with an additional micro to handle the lcd.A serial link between the two would facilitate fetching counter data from the main sashijoseph<sashijoseph@nospam.com> http://www.8051projects.net/forum-t10195.html Hello Stu,here's what an LCD display with Molex connector looks like:and here's a Plug-In type two digit 7 segment LED Display Module SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html Arun,I think an external trigger would be easiest to adapt to my current equipment.Also is there any way to reduce the number of connections the 7 seg SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html Hello Stu,Yes, its possible to reduce the connections to 3 wire if you are using separate power supply and dedicated micro on the display module. 3 wi Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html Arun,the easiest way would be, it has a green led on when its running and the red one on when it stops. i want it to count when the red led comes on. SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html Perfect !thats possible, there are two ways to interface the Red LED on the equipment to micro:1) using a optocoupler like PC817/4N35, if LED can be Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html Arun,i can easily access the LED and its wires.I can also source the At89C2051 and our programmer is capable of progamming it.Thanks. SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html Right O, then !i' ll give you full code and schematic in a day or two - so stay tuned ..............and don't forget to press the Thanks button, if t Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html Arun,If you can provide me with the code and schematic, there wont be enough thanks buttons!!!! LOL SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html Hello Stu,as promised, heres my Schematics for both Counter board and Display Module: 2-digit_counter.rari am writing the code for both the circuits, Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html Arun,the LED goes on then turns off after a while.I'd like it to count from 99 to 0 then instead of an E maybe - - the centre LED segment on both LED SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html Hello Stu,after 2 days of hardwork on your project here are the pics of the project, i have tested the project on the test bench:since i had only one Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html Arun, That looks great, thank you very much.Is there no way that a serial interface can be made so that it can be disconnected then reconnected? SVHANS<hans1stu@nospam.com> http://www.8051projects.net/forum-t10195.html hi stu,i' ll try my best to find a solution to this practical problem, there's no going back after bringing the project to this level !Arun Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10195.html