Three phase AC with frequency adjustment via a potentiometer in ADC Mode with...
Hello everybody,I would like to control the frequency of my Three Phase DC-AC Inverter with the variable frequency so that the VFD can be implemented using PIC16F1937,I have the codes here in...
View ArticleArduino Leonardo self-made board not working
So I had a couple of ATMEGA32U4s lying around the house and I thought why now make a Leonardo for the odd prototyping purposes. The schematic is attached here (its not really a Micro, just the named is...
View ArticleSafely connecting a Microcontroller with a separate power supply to USB
Hi, I'm working on a project with basically a home built breadboard Arduino using an Atmega328p. I've been powering the microcontroller from USB (using a FT232R USB serial breakout board) but am to the...
View ArticleGPS NMEA antenna aiming tracker.
Hi, I am hoping to make a tracker that will aim antennas towards the signal, based on GPS, NMEA, AIS etc signals. There are some parts to this project that I am capable of doing ok, these are Antennas,...
View ArticleDigital Filtering Advice
Spring has not totally interrupted my sessions with WWVB (See: http://forum.allaboutcircuits.com/threads/selecting-best-antenna-type-for-wwvb.121386/#post-986466 ). My codes work fine for reading the...
View ArticleFew questions AT89C55WD, variant of 8051
I am using AT89C55WD, 40 pin DIP, in one of my project. I have connected 12Mhz crystal. It is 8051 variant. So inst time is 1us. Using Keil v4.72.9.0 & C compiler V9.50.0.0 1. How to invert a bit?...
View ArticleCreating a bias for an op-amp and AC signal
I have an MCP601 op-amp and a piezo disc and I want to amplify the signal from the piezo but also have a biased signal in order to read the negative voltages. The device is supposed to be used as a...
View ArticlePIC and Graphics Circuit Design
Hello All I would like to do some graphics on a PIC. I have done the HD44780 LCD but I would like to advance and do some proper graphics. I know there is a development board PICTAIL which can do this,...
View ArticleHow to power PIC24 with battery; SD (data logging)
I have developed an application that runs on a Microchip PIC microcontroller (PIC24HJ64GP502). This is actually a PIC24 (https://www.sparkfun.com/products/retired/9148) that I originally bought from...
View ArticleComments on Breakout board for STM32
I have made a schematic of breakout board for STM32F205RBT6. I will make a square board with all pins from MCU coming out to outer 2.5mm headers. 1. Symbols in schemtaic with name "Nx", are bascially...
View ArticlePolling and interrupts
I have been reading the advantages of using interrupts over polling. A couple of questions: 1. Is the number of interrupts used in a program limited to use of specific pins? 2. Seen as interrupts have...
View ArticleCalculating current draw of simple LED / Resistor circuit
Hi Would the following calculation be correct, it seems to work nicely with an incredibly low current if it is! 3.3v supply (Raspberry Pi), 4.82K resistor (at least that's the reading from my...
View ArticleClik here to view.
Implementing a multiplier circuit on a microcontroller
Hi, Is there any way i can read hex or decimal numbers using a micro-controller and display them on a display? I'm more interested in the part about reading the numbers, as i can't think of a simple...
View ArticleIs there any open source GPU (Graphic processor) that can be purchased?
I looked at Gameduino. Not sure if there is something better than that. thanks jis
View ArticleLCD Initialization problem with 4x20 using XC8, PIC18F45K50, 4-Bit, Pins RD0-RD7
Hi, I'd really appreciate your help, this is driving me mad.. This code works sometimes, if I compile it say 4 times it will run once or twice successfully, the other times the LED's used to trace the...
View ArticleARM Architecture Basics noob questions
Hello If i want to start out with ARM architecture ( I want to run graphics display 4.3 inch or bigger) and along with that it must be able to have I/O to turn transistor circuits on/off as I will need...
View Articlesimulation error:147 in mikroc
hi! In debug mode when execution of a code that loads data to a variable takes place, "simulation erroe:147" is shown.But the variable is not loaded with expected data. what is the reseon?
View ArticleMy first STM32 circuit, is this Circuit ok?
Hi, This is my first time working away from Arduino. I am creating a simple CAN bus analyser using a STM32F105RBT6 I have used parts of circuits from various evaluation boards. But I am mainly...
View ArticleHundaTech 4.3" I2C TFT DISPLAY (PLEASE HELP)
Hi I hava a HundaTech 4.3" I2C TFT Display (Link Below) and want to display value read from the analog pin of my arduino DUE. The communication config i using is I2C Has anyone successfully managed to...
View ArticlePIC 16F877A controller On mikroC compiler
Please Can any one help me on this code I am working with PIC 16F877A controller On mikroC compiler. My code work right but i it not stop while loop(1) when I pressed switch PORTD.F2 can any one tell...
View Article