http://www.8051projects.net/ Learn to make simple 8051 projects, pic projects, avr 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. Tue, 07 Oct 2008 12:27:35 -0700 http://backend.userland.com/rss092 Im new to da world of muc. i want to noe the know how of your circuit.... cud u please enlighten me..... thank u <noauthor@nospam.com> http://www.8051projects.net/forum-t4940.html the circuit has a keypad, LCD and a controller..what you did not understand in the circuit? what part is not clear to you.. please provide more deta Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html I have been told to prepare a project and explain it even before learining what a muc is.... that's how they teach us..... so if you have a ready sheryl<shreyzspace@nospam.com> http://www.8051projects.net/forum-t4940.html Im a third year,6th semester, electronics and telecomm student.... i noe mups... muc is a new subject sheryl<shreyzspace@nospam.com> http://www.8051projects.net/forum-t4940.html well i do not make any abstracts or anything like that.. but the working is simple..for keypad and its working read the keypad tutorialand for LCD Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html give feedbeck on digi lock using lcd & keypad.. is it working on the first run monsieur<excelsohal04@nospam.com> http://www.8051projects.net/forum-t4940.html yes its working.. in comment section you can see two people got it working on the first run. But Please construct your hardware very carefully. Normal Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html @ajay thanx 4 replyin .... sir m using 4x3 SPST switches keypad....... i made it my self . is it ok to use spst switches . also u dont mention ny da monsieur<excelsohal04@nospam.com> http://www.8051projects.net/forum-t4940.html LCD is general purpose.. 2x16 LCD alpha numeric.and the reason i provided the keypad circuit is so that you can make it yourself. Try to run the h Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html sir thanx 4 the previous replies........ plz explain me the code of digital lock using keypad & lcd . in the LCD.C, y u made lockicon,unlockicon, monsieur<excelsohal04@nospam.com> http://www.8051projects.net/forum-t4940.html when you run the program you will come to know.lockicon, unlockicon, ok and ex are arrays to create custom character for LCD. Just check the LCD tut Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html 23.jpgsir, i hv used the switch(shown in red circle monsieur<excelsohal04@nospam.com> http://www.8051projects.net/forum-t4940.html if its a push button then it will work.. i.e. if you press button, it should not stay there.. it must come back to normal position after release. Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html its very hard to simulate it in keil.you need to enter key with row and column combination. I cannot explain this coz its not easy to explain eve Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html hi sir........... thanx 4 replyin so quickly. its great.sir actually in the lab we hv a controller board(made by advanced technology). its got faull monsieur<excelsohal04@nospam.com> http://www.8051projects.net/forum-t4940.html wht 2 do.................then monsieur<excelsohal04@nospam.com> http://www.8051projects.net/forum-t4940.html If you have access to a 2051 programmer,just build the circuit.Would hardly take a couple of hours and a couple hundred bucks. sashijoseph<sashijoseph@nospam.com> http://www.8051projects.net/forum-t4940.html finish the circuit, burn the program.. and run it.. Project Done Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html anybudy help me about reading contents of LCD.......my project is digital lock..... electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t4940.html what kind of lcd content? Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html sorry sir , actually i m working on digital key lock project.i thought that i will get data displayed on LCD to compare password stored in EEPROM electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t4940.html password stored in eeprom?i did not make that project yet. but when i make it.. i will surely upload it.right now i have only the simple code lo Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html thanks for having this prototype posted here.. i just want to ask something.. are the two capacitors near the crystal oscillator 33uF or 33pF??.. if t migs<janmichaelgonzales@nospam.com> http://www.8051projects.net/forum-t4940.html migs, sorry if my schematic makes you think that way.Those are 33pF ceramic capacitors. If they are not available then you can try looking for 22pF. Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html sir,the code limit of ic is 2k.but the size of hex file is more than it then what to do....? singh<asingh_202@nospam.com> http://www.8051projects.net/forum-t4940.html hi singh,if u are talking of the hex file size shown on the PC, then u need not worry as that has no relation to the actual size of the code being d pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t4940.html bkwu, i really suggest you to go through your study material first as that is something which is needed for you. Later on you can try your hands on pr Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html Sir Ajay, im having a project which is similiar with the one you have uploaded,it is given that the design involves a microcontroller interfaced to a bkwu<bkwu88@nospam.com> http://www.8051projects.net/forum-t4940.html 11.0592Mhz is crystal used to provide clock to controller. I am really surprised that you dont know about loudspeaker, but anyways, you can tell the s Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html erm sir, could you list out the component of your project for me ? cause i dont know whats the name of the component, i need to buy it to build my har bkwu<bkwu88@nospam.com> http://www.8051projects.net/forum-t4940.html ok thanks alot for the advise. i have roughly read through the book since i had an exam few weeks ago. im going to have group discussion to do the PCB bkwu<bkwu88@nospam.com> http://www.8051projects.net/forum-t4940.html sure, you can ask queries anytime always here.. Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html can you help me to check does this schemetic diagram fit with what i want ? [img]http://i484.photobucket.com/albums/rr205/bkwu/schemeticdiagram.jpg[/I bkwu<bkwu88@nospam.com> http://www.8051projects.net/forum-t4940.html there seems to be some problem with image you posted, i am not able to open it. can you use www.imageshack.us to upload image? Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html http://img56.imageshack.us/img56/425/schemeticdiagramtm8.jpg[url][img]http://img56 bkwu<bkwu88@nospam.com> http://www.8051projects.net/forum-t4940.html well in that schematic, you mentioned at89c2051, where that controller does not have port 2 in it. however you can use a different controller instead Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html [quote]bkwu, i really suggest you to go through your study material first as that is something which is needed for you. Later on you wan<one366_wan@nospam.com> http://www.8051projects.net/forum-t4940.html sir, now we are facing another problem with the lcd.may i know how can i display * on the lcd ? i mean what is the code for '*'and then bkwu<bkwu88@nospam.com> http://www.8051projects.net/forum-t4940.html for each input character from keypad you can Echo a * on the LCD.Arun Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t4940.html Do like this, copy the getinput routine and paste it in the same file with name getpasswordinput, keeping everything same, just while sending data to Ajay<contact@nospam.com> http://www.8051projects.net/forum-t4940.html