PIC microcontroller
I have salvaged a circuit board and on it was a PIC16C63A-04/SP. I have only found datasheets on google and want to know if this can be used like an Atmega328. View attachment 15579
View Articlecounter number with ATMEGA8
hello all i made a counter number with atmega8 that when PINB.1 is set count 0 to ........ and when PINB.1 is reset count inverse number for example 100-99-98-97-.....-0 View attachment 15765
View ArticleHelp with TFT LCD
Hi all, I have salvaged a tft lcd from an epson printer and I want to interface it to an atmega. I couldn't find a datasheet of the ic on the lcd but I found the connector pinout. The pins are:...
View Articleatmel microcontroller with usb functions and icsp support
can someone suggest me an atmel microcontroller which has inbuilt usb functions that support USB interface as well as dedicated ICSP port or atleast ICSP supportive architecture?
View ArticleNano no longer working
I used my nano yesterday and loaded a sketch to it. The sketch worked but I wanted to make a change. When I tried to upload the changes, I got the error that the serial port 'COM4' is already in use. I...
View ArticleRevised inputs from optocouplers
I am absolutely a newbie in PIC programming. Only have experience of playing with LEDs. For a new project, I am considering to incorporate PIC16F887 or something similar. Following is the flow of the...
View ArticleICSP in PIC18F4550 using LVP enabled
I want to program my PIC18F4550 TQFP in LVP mode using ICSP. However I am unsure of how PGM is supposed to be connected. I read the datasheet and I searched online but I haven't gotten a clear view of...
View ArticleCan this be used?
I salvaged another VF drive from work and got something called an HMOS controller from it. Can it be used in any way? It's an intel P8798...
View Articleregulate 5v circuit from 4*AA batteries
Hi, I need to power a 5v ht1621 LCD from 4*AA batteries. This works directly from the ~6 battery supply but the circuit also has a l293dd driven stepper motor which when turned on, dimms the lcd. This...
View ArticleCarry Save Adder Tree help
Hi Everybody, I am currently trying to implement a carry save adder tree (like a Wallace tree) in verilog but I am really confused about the addition arithmetic of carry save adder trees (I understand...
View ArticleBug-finding
I test software on set-top-boxes. I'm weak at finding problems, issues, and bugs. I mostly run test scripts and procedures, basically spec-testing. How can I become a better end user and ad hoc tester,...
View ArticleTwo functions in the high priority interrupt.
i guys, I'm using the PIC18F46k22 mcu and I'm using two function in my high priority interrupt routine: #pragma code #pragma code My_HiPrio_Int=0x0008 #pragma code #pragma interrupt chk_isr #pragma...
View ArticleHow come the value in my RAM of DS1307 RTC become zero?
Hi guys... I'm using the 56 bytes of RAM in the DS1307 to store some data. My DS1307 is connected to the PIC18F46K22. But after running a few days, all the data inside the RAM will suddenly become...
View ArticleCode in setup section of a sketch
Can it be done? I am learning to use the Ardunio Uno as I work on my project and believe this may be an easy way round a problem. I am working on the ignition of my old tractor and will be using hall...
View ArticleIndexing a gearmotor with Arduino
I am trying to write a code to index a gear-motor (continuous rotation servo) a set number of degrees with an encoder. This will be used to control the "drum magazine" on my coilgun project board is an...
View ArticleIndexing a gearmotor with Arduino (take #2)
I am trying to write a code to index a gear-motor (continuous rotation servo) a set number of degrees with an encoder. board is an Arduino Mega 2560 encoder has following pins A, A', B, B', Z, Z'...
View ArticleIndexing a gearmotor with Arduino
I am trying to write a code to index a gear-motor (continuous rotation servo) a set number of degrees with an encoder. board is an Arduino Mega 2560 encoder has following pins A, A', B, B', Z, Z'...
View ArticleLM2907 output saturates with i/p signal of 90% duty cycle
Hi, Am using 14 pin version of LM2907 IC. Input frequency is RPM feedback from a tachometer. Maximum input freq expected is 13 kHz. Circuit works fine over full range of frequency with square wave...
View ArticleProblem faced in generating more i/o's through AVR
Hi Friends, How can i generate more i/o's by using Atmega16 or Atmega32.... I tried different things but they doesn't work. I shall be very glad if anyone could help me in solving this problem. Thanks.
View Article5 V to 1.7v (in SPI)
I am trying to light-up a OLED. It follows a certain sequence of applying voltage and sending code. the controller I'm using (PIC16F877A) gives out 5v during data transmission (3 wire SPI, Controller...
View Article