Long chain of MAX7219 Matrix displays Fail
I am building a rather large clock from 8x8 matrix displays using the MAX7219 connected in series. If I have 4 or less modules connected, it seems to work fine. More than 4 and there is an obvious...
View ArticleGPS clocks
Hi all, I am interested in designing GPS master and slave clocks . Please let me know how i can go about this and which is the best suited GPS module.
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AVR ATMEGA8 connection on breadboard
Hi all!, I have stand-alone AVR ATMEGAA8 microcontroller so I want program ATMEGA8 by placing all required component on a breadboard. I got some information on the google search. I drew a connection...
View ArticleMethod To Reset Bricked AVR
Hello, I have been trying to figure out the best way to reset the (clock) fuse(s) on my Atmega8 which I bricked when trying to set up an external clock (no idea what I was doing in terms of the...
View ArticleGPS clocks, help synchronize master clock with slave clock
Hi all, I am interested in designing GPS master and slave clocks . Please let me know how i can go about this and which is the best suited GPS module.
View ArticleI2C with pic 18f4520
Hi, I want to make a serial I2C communication with pic18f4520 in mode slave
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PIC32MK MC QEI example
Needed to build a tester for some high resolution QEI encoders. The speed and number of counts per revolution favored a hardware motor control solution for the A/B/Index signals vs a software solution....
View ArticleCheck if SPI transmission is complete in PIC18.
Hello. As far as I know, the check if SPI transmission is complete can be made looking at SSPSTAT,BF flag: Code: movwf SSPBUF LOOP btfss SSPSTAT, BF ;CHECK IF TRANSMISSION IS COMPLETE goto LOOP bcf...
View ArticleBest sbc for vpn
Hello, I want to do a private vpn, and I don't know which SBC would be the best choice. Mainly for netflix and just browsing the internet when I'm abroad. Which SBC do you think will be the best choice...
View ArticleRelying on microcontroller pin protection diodes?
I want to drive a 270Ω coil with a bipolar 1.5V square wave from a microcontroller (PIC16F1847) running on 5V. First thought was an h-bridge but that seems over the top. Second thought was simply the...
View ArticleAccessing the accelaration data in BNO055 IMU sensor and calculate distance...
hello @Mark Hughes , I read your BNo055 article. I am currently working with it. It is a part of a MOAB board and Im supposed to use it to calculate the distance moved by the bot on which the board is...
View ArticleWhy LED is not turning OFF - 8051 Timers
Hi I want to ON/OFF LED for 500 ms. I have written a program that suppose to ON/OFF LED for 500 ms Environment : AT89C51, Keil, C: #include<reg51.h> sbit LED = P2^0; /*LED connected at output Pin...
View ArticleRf interface with pic
I am trying to build a device which identifies itself , for example , I am interfacing rf module of any frequent range with pic microcontroller and I'm building two device like the same ,these devices...
View ArticleHow Delay mechanism works in embedded EFM32
Hello,I cant see how the following code dmaking a delay? We have SysTick iterrupt which i dont know what it means. What is the meaning of SysTick_Config(CMU_ClockFreqGet(cmuClock_CORE)? Thanks. Code:...
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ESP32 Wroom custom PCB not working
Hello all, I have made a design with ESP32 Wroom and CP2102-GM UART bridge. My board is getting recognized by the PC but the code is not being uploaded to the board. I am getting timed out error on the...
View ArticleControl TECs with Arduino and MOSFET
Hi everyone, I've been reading many forum posts and articles about MOSFETS and reading their datasheets. Although I'm getting more comfortable with the topic, I still have a lot of questions. As I'm...
View ArticleControling Nixie Tube with sn74141 and Arduino
I am trying to control a single IN-1 tube . I connected everything in the way shown in the attached diagram (the only difference is that Arduino is not powered from 12V power supply but from USB...
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PIC Development Board with PK3
Today I got PIC development board and just waiting for microcontroller
View Articlehelp validating SPI command for MX25R device
Hello , I Want to Write data to this device and read from it.using the manual shown bellow. For writing At first i though i should do those two commands: 1st command {0x06};//write enable command 2nd...
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STM32F302R8 question
Hi, I'm curious why the C116 to GND is needed. What might be it's function?
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