Issue with dual 74hc595 output from Arduino
Greetings, I recently completed a project involving reading temperatures with an Arduino that uses 4x seven segment LED displays. Currently, I am attempting to develop a similar system which uses a...
View Articlehow to extend keypad by using just 8 wire
Hello, im designing a keypad i tried with 4*4, but the total combination of the above condition is. for 4*4 the total and max combination is 16. View attachment 131346 and i want the total of 20...
View ArticleHow erase Atmega8 microcontroller
Hello I write only the fuse to my Atmega8 as shown the attached picture. now I can not writing the hex file. and I get message unknown device. I try to erase the device but I can not. is there a way to...
View Articletexas instruments chip programming
I have used the microchip 16f690 for a few projects and am embarking on a new project and am considering moving to a TI chip. I need an adc function and a couple inputs and one output. I found some TI...
View Articlehow does I2C program work?
I don't understand how does I2C program work I2C is a serial communication protocol. it is basically two-wire communication protocol.It uses only two wire for the communication. In which one wire is...
View ArticleSimulate PIC in OrCAD
Hi! I need to make a time-domain reflectometer. I've simulated the circuit in Proteus, but it didn't work for some reason. I was advised to try doing it in OrCAD, but I can't find the library I need...
View ArticleClik here to view.
HV DC current mirror
Hello, I have an analog circuit that I want to simplify with a microcontroller instead. I need a microcontroller to measure current at two points and apply feedback to a transistor until the currents...
View ArticleUART Receiver Framing Error
Hello sir, I'm receiving "UART Receiver Framing error" and some characters are working fine but some are not….my right hand keys are working fine but left hand keys are displaying different...
View ArticleStart learning microprocessors
Hi, I'm an EE student and I want to learn about microprocessors and use them in my projects in future. Could anybody suggest me something to start with? Is arduino good for starters? Thank you very...
View Articleprofibus or Ethernet(TCP/IP) for communication?
Hello Everyone, Let me explain my project before i ask the all important question/ Currently we have around 80 signals(40 analog signals and 40 digital signals) going from the control hardware to a...
View Articlewiring and control method to connect an arduino to a PWM dc controller
https://www.aliexpress.com/item/NEW...11237.html?spm=2114.10010108.1000023.1.jILm8k $us 46.39 $nz 63.44 free ship. This looks like an appropriate unit to use. The motor is 12V, 700W rated, potential...
View ArticleADC conversion result and negative output
Hi all, I have a pic16F1782 and the ADC conversion result can be supplied in 2 formats, either magnitude or 2's compliment. Both formats show the decimal range for -4096 to 4096 and their equivalent...
View ArticlePIC Microcontroller and Reducing Noise.
Thank you for reading my posting, I have been working with a simple circuit involving a PIC12F617 microcontroller written in assembly. This circuit simply blinks an LED on for 1 sec and then off for 1...
View ArticleIssue in Sensored BLDC motor driving
Hello All, Good Morning!!! I have developed 12V and 24V BLDC motor driver with max current upto 20A The driver is working fine. The efficiency is good. Sometimes it is giving the issue. Sometimes once...
View ArticleSoldering QFP, QFN... - Solder Question
So, I have always soldered DIP IC's and SOIC type packages. I used the 0.71mm solder wire to join the pins. So when soldering 64pins and 128pins etc I plan to use: 1) a hot air station (still need to...
View ArticleProtecting PIC24FV input pins from excessive voltage
Hi Circuiteers. I want to measure a low impedance voltage source using the ADC when the source is in the ~1V range. However it can also go up to ~50V so I need to protect the PIC. Would a ~100k...
View ArticleImportant variables in toggle_pin() being optimized out
Hello, I am using the pio_toggle_pin method and when I step into it, I can see that an important variable is being optimized out. Needless to say the pio_toggle_pin() method doesn't work as expected...
View ArticlePIC Assembler 12F683 W Register Memory Map Location
Here's the plan Write code snippet to load register with a value. Program the chip. Look with IPE for the value. 12F683 choice is tentative. If it needs calibration adjustment. Forget it. Will use PIC...
View ArticleResolved - Issue with dual 74hc595 output from Arduino
Greetings, I recently completed a project involving reading temperatures with an Arduino that uses 4x seven segment LED displays. Currently, I am attempting to develop a similar system which uses a...
View ArticleExtend SPI bus between Arduino Due & FLiR Lepton
View attachment 131791 View attachment 131792 I have got the example code shown below by Josep Bordes working fine using the Arduino Due to interface the Thermal FLiR camera using SPI & I2C...
View Article