Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi GoldSmith, Thanks for your help, the schematic I have attached below (apologies for the hand drawing I have not got my CAD program with me!) I can interface the IL420 to my microcontroller with a single 270 Ohm resistor I belive which will not damage the uC but provide enough current to drive...
Hi there, I am just finishing off my Micro-Controlled Light Dimmer system. However I am struggling to work out component values and connections for my Triac and Photo Triac.
I have a 5v pulse from my micro-controller to swich a triac at a varying point every half cycle. This will be connected...
Okay, I have managed to sort the Assembly program to operate pins 1.3 and 1.4 seperately using Modules 0 and 1 after a set delay after the external interrupt 0 has triggered. However the maximum delay I can now trigger is using 0FFh as both CCAPxL and CCAPxH gives a delay of 23.7mS between...
Thus us the last piece of my code I need to sort to get my project working and I just cant get my head around how to do it! I am using an Atmel 89C51ED2 with 11.0592MHz crystal.
Essentially what I am making is a light dimmer. Now I have got a zero crossing detector which sends a pulse to pin 3.2...
Hi here, I am struggling to set the baud rate on my 89C51CC03, I have set the TH1 and TL1 values to 0F4H using an 11.0592Mhz crystal, which should result in a 2400 rate, which the Keil uVision Simulator agrees with. However when I run the program on my actual chip I am still getting a 9600baud...
Problem was due to different names given to interrupt bits in definition file (from Atmel) compared with that provided by the Keil uVision. Changed the names in the definition file and now works perfectly.
Steve
I have created this piece of code from two smaller pieces of code I have been working on, one to do Analogue to Digital Conversions and the other to deal with interrupts and send data through the serial port. I have combined the two programs 99% sucessfully except for problems enabling the...
Have messed around with Baud rate and have now got something showing up at the receiver side :) The problem now seems to be that the TX line on the chip is at 5v and drops to zero during a pulse, however on the data output of the receiver, the RX line is at 0v and rises to 5v during a pulse...
Yeah, struggling to find what to set it too. If i also set it to #0F4h, operation still seems to be at the wrong baud rate. I might try altering it to see if i can make it work.....
Thanks
Steve
Excellent thankyou, just what I was thinking. I have created a simple lower frequency pulse with one of my 89C51s which is around 1kHz and sent this through the transmitter, it is received perfectly at the other side :)
I just need to try and reduce the Baud rate of my UART as you say now to...
I am trying to develop a serial link over 868Mhz using two 89C51s (one at each end) I have got a simple piece of code allowing me to send a piece of 8-bit HEX data from my computer to the transmitter which in turn then sends to the receiver turning on a LED at certain values, and off at others...
I have a system which uses an Atmel 89C51CC03 processor. From the data sheet and my other system (Fully working and using Atmel 89C51ED2) I have a switch in place which switches PSEN pin between GND and floating. When programming the chip via Atmel Flip I have the switch to GND (Boot position)...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
