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ldr sensor to mcu
i am searching for the various ways plus circuit diagram for connecting the ldr sensors to the 89c51 µc i/o ports! i need the sensor to give my controller a +5v signal when its enabled and 0v signal when its disabled! thats it, a simple one....but i ...
Microcontrollers :: 16 Dec 2005 11:19 :: silvio :: Replies: 9 :: Views: 1563
interface the at89c52 to the serial eeprom at24c04
hi all,i want to interface the at89c52 to the serial eeprom at24c04. i did not make that be4.could anybody send the scematic and the program to read & write to the eeprom??? could u help?? hope so thanks alot bye :dahmed...
Microcontrollers :: 12 Dec 2005 10:52 :: sokrat :: Replies: 7 :: Views: 834
software pwm generation?
how a software based generation of 8 pwm outputs can be implemented?actually i want to implement 8 pwm outputs to drive 8 servos just like a hardware pwm generator. just put the values in 8 16-bit registers and it will update the pulse width of respe...
Microcontrollers :: 04 Dec 2005 23:49 :: mnegm82 :: Replies: 21 :: Views: 1860
infra-red remote control ...
hi all ;i have got a strange problem on infra-red remote control , my problem is short range af transmitter ,i have desigend a receiver and transmitter ( infra-red ) , using 2 89c2051 , one as sender and one as receiver .i connected a led to the outp...
Microcontrollers :: 02 Dec 2005 5:02 :: afti_khan :: Replies: 5 :: Views: 786
20 pin uc with 8051 structure ?
i have used the atmel 89s51 microcontroller and its great. its major advantage is that it is very cheap !!! . what i wanted to ask is that is there any 20 pin micrrocontroller similar to the 89s51/52/53 etc.can anyone give me the exact part number of...
Microcontrollers :: 12 Nov 2005 4:45 :: waseem :: Replies: 5 :: Views: 432
is it good
hi every body i am new learner in microcontroller i learned to use 16f84and it was very easy a lot of my friend use atmel , avr and send it is better and i want to ask what is the different between them????...
Microcontrollers :: 31 Oct 2005 11:22 :: mr_byte31 :: Replies: 8 :: Views: 501
at89c51 c coding tutorial
i need tutorials on c programming for mc at89c51 for beginners :?::?::?:...
Microcontrollers :: 31 Oct 2005 5:41 :: idlebrain :: Replies: 7 :: Views: 4254
prog for at89c2051
hello, we made small project 12 channel ir remote control. we buy that readymade project form visha kits.we want proq written for 89c2051 & submit it in college but visha kits refused to give that prog. please send me that prog if any one have it . ...
Hobby Circuits and Small Projects Problems :: 16 Oct 2005 9:00 :: pareshbhangale :: Replies: 0 :: Views: 201
89c2051, avr. which mcu is low price?
thanks...
Microcontrollers :: 28 Sep 2005 3:44 :: WinterInJuly :: Replies: 6 :: Views: 639
89c51 i2c
hi,may i know the function i2c on at89c51 is which pin? is it pin16 port3.6 and pin17 port3.7? anyone can tell me.....thanks.......
Microcontrollers :: 14 Sep 2005 8:07 :: Vedas :: Replies: 10 :: Views: 1203
can anyone advise using 89c2051 to build a count-up counter
i am a new starter from hong kong, self-learning 89c2051 for 3 months,now can use simple bascom programme to programe 89c2051,it is great.i want to build a 3-digits 0-999 count-up counter withusing 89c2051 to drive 3 common anode 7-digits led. when ...
Hobby Circuits and Small Projects Problems :: 26 Aug 2005 10:53 :: landrover :: Replies: 4 :: Views: 666
89c2051 programmer - problem!
i built this http://www.amateurfunkbasteln.de/atprog/atmel_eng.html programmer, and it doesnt work on my laptop! but it works on my table computer! why? anyone now the answer?please help! thx...
Microcontrollers :: 13 Jul 2005 21:31 :: pkedvessy :: Replies: 4 :: Views: 303
sending and receiving at commands on 89c2051
has anybody any sample code written in asm that would help me to send at strings to 89c2051? added after 2 minutes: i need this to dial a number for a gsm mobile phone....
Microcontrollers :: 04 Jun 2005 4:19 :: glenjoy :: Replies: 2 :: Views: 366
convert hex codes to assembly
hi, can any body help me in converting my assembly file from hex codes....
Microcontrollers :: 17 May 2005 8:19 :: Cortex :: Replies: 5 :: Views: 918
40watt tube ballast with 89c2051
hi, can u help me by giving guidence in making good and lasting 40watt tube ballast. can we use 89c2051 as a heart of it for more accurate operation....
Microcontrollers :: 04 May 2005 0:55 :: xjackal :: Replies: 4 :: Views: 465
security system 89c2051
hi, can i get some help from any body in making a security system based on 89c2051 for home....
Microcontrollers :: 20 Apr 2005 9:59 :: hamadeh :: Replies: 1 :: Views: 198
looking for simple diy 89c2051 programmer
hi all, i am loking for a simple 89c2051 programmer. please help....
Microcontrollers :: 17 Apr 2005 19:55 :: Taro :: Replies: 3 :: Views: 300
help with real time clock
i dont know much about real time clocks.im using it in a project along with a pic18f452. the device will continuously sense a measurement and have it stored, the real time clock should send an interrupt to the pic every 2 seconds. when the interrupt ...
Microcontrollers :: 20 Mar 2005 13:07 :: pvinbox@yahoo.com :: Replies: 14 :: Views: 4413
internal register and default address of at89c51 and at89c52
hii know i should have looked into datasheet but i am kind of hurry at the moment so does anyone know how many internal registers does at89c51/at89c52? what is the device address (default) for at89c51 and at89c52? can i make my own device address??t...
Microcontrollers :: 15 Mar 2005 4:02 :: silvio :: Replies: 7 :: Views: 387
blowit 89c2051 programmer
anyone tried this (http://www.geocities.com/dinceraydin/files/blowit.pdf) programmer???...
Microcontrollers :: 13 Mar 2005 17:41 :: pkedvessy :: Replies: 0 :: Views: 498
ADS
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keylogger with 90s2313
and a computer! if anyone has information in this topic, please write! its important for me!!!thx a lot!ps.: here is an example link, what i want to do, but the problem with this, that its work with 89c2051, and not 90s2......
Microcontrollers :: 05 Mar 2005 13:15 :: pkedvessy :: Replies: 0 :: Views: 240
rapid programing system for atmel 8051 series
hithis is nice tool learning programing for newbie in quick way support atmel 8051 series of microcontroller 89c51,89c52 and 89c2051 this work as under.* direct keyboard entry mode no need of p-c* serial port intreface modeall detail and software in ...
Microcontrollers :: 03 Feb 2005 7:25 :: Fragrance :: Replies: 0 :: Views: 255
initializing ports on microcontroller
hiim using atmel 89c2051 uc. i have used it before but i have come up with a unique problem.i.e. when i need to communicate serially with pc through rs-232... it requires that i do not initialize the ports with 0x00. [initializing with 0xff works som...
Microcontrollers :: 30 Jan 2005 17:18 :: glenjoy :: Replies: 4 :: Views: 195
a serial communication between two at89c51 chips
greeting everyonedo you know any good tutorial for me to learn how to set up a serial communication between two at89c51 chips in c language and a schematic layout?thank in advancemaverickmax...
Microcontrollers :: 16 Jan 2005 22:05 :: Ace-X :: Replies: 8 :: Views: 903
microcontroller based infra red remote control
i need a schematic of irfra red remote controller based on 89c51 or 89c2051 microcontroller, the circuit capable to controll the speed of fan and operate on 220 v...
Microcontrollers :: 14 Jan 2005 18:02 :: ep20k :: Replies: 10 :: Views: 1872
atmel at89c51 programmer with parallel port
hii,i would like to make my own bare bones at89c51 programmer connected to a pc parallel port. please donot tell me to use special ics 8255s or another at89c51. only ttl logic ....simple ttl logic, simple regulated power supply, setup on a breadboard...
Microcontrollers :: 14 Jan 2005 13:10 :: gamegurus :: Replies: 4 :: Views: 1902
how to decrypt
how to decrypt the encrypted code of 89c2051 microcontroller...
Microcontrollers :: 05 Jan 2005 14:30 :: Microemission :: Replies: 1 :: Views: 336
algorthm for implementing crc on 8 bit data.
hi everyonei need a subroutine for calculating crc for a 8 bit data. i am trying to use the 89c52 to do the calculation. the polynomial for thr crc-8 is x^8+x^2+x+1.thanxs in advance....
Microcontrollers :: 01 Jan 2005 14:39 :: snabilat :: Replies: 3 :: Views: 273
real time clock vs. pic timer1 module
hi.in clock application (using pic mcu+lcd) what we should use to achieve precision on time...is timer1 enough(with 32.768 khz osc) or real time ic necessary???is there any difference about precision???...
Microcontrollers :: 09 Dec 2004 5:06 :: CMOS :: Replies: 10 :: Views: 3225
need help interupt diversion
im currently using at89c2051 mcu.does anybody now if i can get an external interupt from other pin instead of the t1 or t0 pins. especially for the edge triggered interupt.basically i need 3 pins for external interupt which point to int0 sub routine....
Microcontrollers :: 07 Dec 2004 11:33 :: SphinX :: Replies: 3 :: Views: 213
has anyone used the ddram of a hd44780u lcd as a general ram
dear all,as far as i can understand it is possible to use the ddram or cgram of a hd44780u lcd as a general ram.i wonder if any one of you has used it? if so could you please tell me how?if possible please give me your project.myself...
Microcontrollers :: 18 Nov 2004 9:46 :: C-Man :: Replies: 1 :: Views: 450
how lcd interfaced with microcontroller
i am working on a project where i have to interface lcd with at89c2051microcontroller. can anybody suggest whitch lcd display i have to use.also sites where i can search....
Electronic Elementary Questions :: 30 Sep 2004 19:05 :: eltonjohn :: Replies: 4 :: Views: 738
micro controllers!
can you recommand me a small size microcontrollers such as atmel 89c2051 or cop8saa5, and can anyone give me a good suggestion ?give me a good comparison beteen all good microcontrollers and other devices. from performance, price, and etc. best regar...
Microcontrollers :: 15 Jul 2004 17:17 :: dahem0n :: Replies: 9 :: Views: 726
how connect a pic or 89c2051 to a max6952 ic
i try to make a rotating text on eight 7x7 led matrix displays with two max6952 icshow can i connect a microcontroller to this chip( pins dout, clk, cs, and din)link to max6952http://pdfserv.maxim-ic.com/arpdf/max6952.pdfplease give me a schematic w...
Microcontrollers :: 09 Jul 2004 9:18 :: ahmad_imran :: Replies: 1 :: Views: 433
atm light programmer ver-1
prog.for mcs-51 / avr / attiny28 89c1051 89c2051 89c4051 89c51 89c52 89s53 89c55 89s8252 90s1200 90s231390s4414 90s4433 90s4434 90s8515 90s8535 90c8543 attiny28...
Microcontrollers :: 15 Jun 2004 16:51 :: sokrat :: Replies: 7 :: Views: 1275
can the avr isp programmer from atmel program 89c2051 chips?
can?...
Microcontrollers :: 10 Jun 2004 12:47 :: ramesh :: Replies: 1 :: Views: 303
at89c2051 serial programmer
does any body have the schematic and software for at89c2051.heard that *airborns serrial programmer is good one.does someone have this.please help :)...
Microcontrollers :: 27 Apr 2004 19:15 :: hm_fa_da :: Replies: 1 :: Views: 744
89cxx5x evaluation board
has anyone sch for evaluation board that supports atmel chips c51,c52, c2051/52 , external (eep)rom, lcd, i2c, a few buttons, rs232, ir...i tried to use bascom evboard and to make it usable not only for 2051 chip but im not so sure in my job...i use...
Microcontrollers :: 25 Mar 2004 0:16 :: SphinX :: Replies: 1 :: Views: 651
remote light dimmer
k with rc5 basedremote but i have also a design based on 16f628 which can adjust it self automatically on any remote in other it can program according to your remote any way uploaded file is based on 89c2051...
Microcontrollers :: 05 Mar 2004 8:02 :: Fragrance :: Replies: 3 :: Views: 2463
pulse counter
need a kind diferent pulse counter. it may have a pic or an avr or even discrete cmos/ttl ics. it must have two lines with 4 digits each line, one for total counting and other with sub total. each line must have a separe reset or the reset for subtot...
Hobby Circuits and Small Projects Problems :: 28 Feb 2004 0:11 :: fjpompeo :: Replies: 2 :: Views: 801
req. digital tachometer
i need circuit digital tchometer range 30000 rpm(2051+4 digit 7seg. led)...
Hobby Circuits and Small Projects Problems :: 27 Feb 2004 13:20 :: tanveerriaz :: Replies: 5 :: Views: 2178
easy-downloader v1.1 for atmel 89c2051/4051
here is the link:http://www.51c51.com/diy/p2051.htmtornado...
Microcontrollers :: 01 Feb 2004 22:24 :: Tornado :: Replies: 0 :: Views: 468
how to program 89c2051 smd type ?
i want to know how to program 89c2051 smd type , can i program it by usual 89c2051 programmer ?thank you ,...
Microcontrollers :: 06 Jan 2004 2:28 :: glenjoy :: Replies: 2 :: Views: 364
universal remote control
hi alli want to build universal ir receiver using microcontroller any one can help mes 8o krat...
Microcontrollers :: 28 Dec 2003 15:05 :: Humber555 :: Replies: 3 :: Views: 526
miniproject with microcontrollers
assalam-o-alikum i am student of be , and i have to do a project with atmel 89c2051 microcontrollers . i need some good and implementable ideas for projects. ill be highly grateful for help. thankyou ...
Microcontrollers :: 08 Nov 2003 19:18 :: czpir :: Replies: 5 :: Views: 831
atmel 2051 project
assalam-o-alaikumi need to do a miniproject with atmel 89c2051 microcontrollers. i need ideas for that purpose. ill be grateful for your highly valuable suggestions.thankyouallah hafiz/ warning #1 - stop cross posting! only start same topic once!this...
Hobby Circuits and Small Projects Problems :: 08 Nov 2003 19:15 :: czpir :: Replies: 4 :: Views: 2692
how build parallel dongle
i look for build parallel dongle can help me or give me some link ?i look for build serial dongle can help me or give me some link ?...
Professional Hardware and Electronics Design :: 04 Nov 2003 20:53 :: Analyzer :: Replies: 7 :: Views: 2176
fm pll (88 mhz - 108 mhz) pic 16f8xxx
helpwhere is the fm pll (88 mhz - 108 mhz) with pic 16f8xx sch or asm code...
RF, Microwave, Antennas and Optics :: 03 Nov 2003 18:05 :: bobcat1 :: Replies: 4 :: Views: 2000
pic + humidity sensor
hi,i need to interface capacitive humidity sensor /220 pf/ to pic. which is the best way to do that with minimal component count?thanks...
Hobby Circuits and Small Projects Problems :: 17 Sep 2003 10:09 :: Kripton2035 :: Replies: 11 :: Views: 3463
i button from dallas simulation
hi,is it be possible to make copy of a working ibitton on a controller? so i will not need the ibutton....
Microcontrollers :: 27 Aug 2003 13:06 :: sadat007 :: Replies: 4 :: Views: 796
building pc serial self power ...
i need build rs232 self power interface with bidirectional serial interfacewith mcuhave any info to do it ?...
Microcontrollers :: 18 Jul 2003 9:35 :: maziar :: Replies: 3 :: Views: 448
how connect a max6952 to a uc ( pic or 89c2051)
who can help me ??schematic and software...
Microcontrollers :: 30 Jun 2003 22:25 :: The Puma :: Replies: 0 :: Views: 543
wake up from power down mode
iam using uc 89c2051 with a keypad connected to one of its 2 ports , i want to save power in my design as much as i can ; so i want to work in power down mode and let the uc to wake up only if the user clicks the key ; but the problem is that the uc...
Microcontrollers :: 21 May 2003 0:00 :: 2000 :: Replies: 3 :: Views: 691
pc watchdog - any projects/concepts?
ched to the serial port which has to be retriggered by a daemon process on the server every few minutes else it will reset the server.watchbox serial is quite what i mean.hardware will basically be a 89c2051 based µc system with an rs232 interface an...
Hobby Circuits and Small Projects Problems :: 13 Apr 2003 23:34 :: mip :: Replies: 0 :: Views: 421
seven seg*ment display driver?
hiwhat is the minimum chip ,i/o and size solution for driving 18 common anode or common cathode seven segment display?(multiplex or non multiplex)bye...
Professional Hardware and Electronics Design :: 18 Jan 2003 3:08 :: cawan :: Replies: 16 :: Views: 1372
low cost 8051
hii need to know what 8051 components on the market have the prices under 3$?...
PC Programming and Interfacing :: 22 Dec 2002 18:39 :: yager :: Replies: 3 :: Views: 1180
proteus and interrupt debuging ?
hi all,i have started to learn proteus.i wrote a simple program to make a delay of approx. 100ususing interupt. xtal= 12mhzorg 0000 sjmp startorg 0bh sjmp interstart: mov p1,#0 mov ie,#10000010b enable interupt on timer 0 overflow mov tmod,#00...
PC Programming and Interfacing :: 02 Oct 2002 16:18 :: SphinX :: Replies: 3 :: Views: 1571
wow!!! rc5(ir code) c source?
hello...need rc5(ir code) c source for 89c2051....thank you. ^o^!!!!!!@!!!@!!!!@@!...
Professional Hardware and Electronics Design :: 30 Jul 2002 16:58 :: mk :: Replies: 2 :: Views: 612
help me! rc5 c source.
/** ir_led test for 89c2051 **/#define ir_led p1.0void delay_us(int tt){ while(tt--);}void delay_ms(int tt){ while(tt>0) { delay_us(160); delay_us(160); tt--; }}void rc5_send_pulses(void){unsigned char i; i = 32; ...
Professional Hardware and Electronics Design :: 14 Jun 2002 12:53 :: z543g :: Replies: 0 :: Views: 398
zerocross
i made a dimmer a while back and had problems with the zero cross detection due to mains noise and got tired of it and put it on the shelf. normally it worked fine but sometimes it could make a sudden flash (once a week). the software is minimal and ...
Professional Hardware and Electronics Design :: 16 Mar 2002 17:50 :: brankob :: Replies: 20 :: Views: 2523
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