matrix display error
sir i made a led matrix display of 35×7 and we use eproam24C04 programming and we put its hex code but not any thing show on display.so sir please help me to done it.thanks
View ArticleMinimum Vref Voltage?
I am using 16F877A for a ADC conversion from a temprature sensor LM35. If I use VDD as reference, I get 5/1024 = 4.8mv appx resolution. I am thinking of using Vref as a reference and I would like to...
View ArticleYou know, if I had even a LITTLE brains, I'd be dangerous!
Ok, so the back story is that my shop computer went to data heaven about three weeks ago. Very old, time for something new. Bought a new (to me) machine, and proceeded to put everything back on it. My...
View ArticleI'm at a loss
Hello, OK, can't seem to figure this one out. I have a PIC16F628A that I have written code for. I try to program it and I get this, "Target Device does not match selected device". Now, the funny part...
View ArticleCalculating MKT
Hi, I need little help about math for calculating Mean kinetic temperature. I have 10-60 samples on same time interval. First I was thinking that I maybe put this equation in exel or matlab, and then...
View Articleneed help coding NRF24L01. What am I missing?
OK first off I know my code is horrible and I have no intention of becoming a professional coder so I'm not going to change that. But to the point, I'm trying to send the number 1, wait a second, the...
View ArticlePIC power supply basics
Can anybody help this newby please. I have studied a few datasheets and other docs, forums and FAQ's, but I just end up with more questions than answers. I get from a Microchip document that the 12V...
View ArticlePIC16F527 don't do nothing...
After banging on this thing for a few hours I'm beginning to think this device is really chewing gum with metal legs. ;) This is kindof' an odd device; its like a "PIC12Fxxx" but with a "PIC16Fxxx"...
View ArticlePrint circuits directly with inkjet printer
http://m.hexus.net/tech/news/periphe...inkjet-minute/ Robert
View ArticleRuined U2 Programmer?
It has been a very good week - lots of progress and I'm feeling a little proud of myself... until last night. I managed to let the smoke out of an L293 driver chip, but the fire was quickly subdued and...
View Articleser2 command -- can not select Parity-bit !!
Hi every one I have a problem about "ser2". I need , select the parity bit (non,odd,even). And try this program... ...But I can not select parity bit I got Select "non" or "odd" can not select "even"...
View ArticleEpson M-42V datasheet
Someone kindly send me the datasheet for Epson M42V thermal printer... Its very urgent... Mail to service.statex@statexengg.com
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PIC16F84A Microcontroller based Digital Clock
Hi Friends, This is a PIC16F84A Microcontroller based digital clock. It displays hours, minutes and seconds using six 7 segments displays. The circuit has three push button switches to reset and set...
View Article"Writing error" and "communication timeout" PIC16F877a bootloader
Hi, I am working to get the Shane Tolmie v9.30 bootloader (pic downloader 1.08) working with my PIC 16F877A @ 20MHz on my PCB board and I am encountering some strange problems. When I try to write the...
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Banks related to memory problem?
Hello, I have been having a bit of what I think is memory trouble with a refrigeration control algorithm I wrote for an PIC18F86K22. The symptoms are this: setup program variables (there are a lot)...
View ArticleLogic
Hi Guys, Needs a little more advise to help sort out a small logic issue that I can't get my head round Following on from my previous threads, I use a word variable counter1 to count the minutes from...
View ArticleShiftin problem (16f877A with MCP3201)
I have my LM35DZ connected to a MCP3201. The connections between MCP & 877A are as follows: CLK - PortE.0 Dout - PortE.1 CS - PortE.2 My code is as follows: Code: '-----------------Defines &...
View ArticleRotary Dial to DTMF
Hi Guys, Did this just for kicks.. and I got an old phone. Apparently there's a commercial product for it called "RotoTone", and is legal in some countries, and not others. Works both ways.. either...
View ArticleMultiple PWM pins
Hi My current project uses an 18F4520 with two hardware PWM pins (C1 and C2) to drive two LED drivers so that the chains of LEDs can be ramped up and down. My code also uses an internal timer overflow...
View ArticleAll about Occillators? Frequency/PLL?
OK Im getting confused again. Ive been working with internal OSC for awhile, and i have done just a basic 4mhz resonator, and a 20mhz ttl osc. however I would like to get to understand more how the...
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