A device which includes a central processing unit (CPU), memory, and (generally) an assortment of I/O peripherals (UART, ADC, DAC, general-purpose I/O, I2C, etc.) in a tightly-coupled standalone package.

learn more… | top users | synonyms (1)

0
votes
1answer
28 views

Industrial standard communication between multiple micro controllers on same pcb

I'm just wondering what would be considered industry practice of communicating between multiple micro controllers on the same pcb for instance when the digital i/o's or analog ins have been used.
0
votes
1answer
61 views

Biggest variable that is possible to define

I have a lot of data to storage at very fast speed. I can't send them using serial becouse is too slow. I've tryed to use and external flash memory but due some library problem I can't reach writing ...
0
votes
1answer
44 views

Interfacing CT sensor to Microcontroller ADC

I am trying to connect a Split Core current transformer(CT sensor) to my microcontroller. My CT sensor gives an AC voltage as output so i cant directly connect the output of CT to microcontroller ...
-1
votes
3answers
55 views

Getting started with Atmel AVR [on hold]

i would love to start learning AVR programing for Atmel's chips. Currently i'm using only Arduinos with their standard API and im really happy with that, however i would like to learn more and go ...
1
vote
1answer
96 views

Needing help with chip identification: Hard mode

I'm decently skilled with basic ic identification methods and lot number cross reference identification for the rebadged chips, but I've ran into a chip I just cannot identify. On the same board there ...
0
votes
0answers
37 views

How long would an microcontroller survive data pulses shorted through back fed ICs?

I have some circuits of devices connected via I2C busses on uncoded pinheader connections. If the header is plugged in reversed, the signal wires of the plugged module would receive power, and most ...
0
votes
0answers
29 views

Brown out levels for a micro controller

I am working with a Tiva TM4C series micro controller which has a operating voltage range of 2.97V to 3.63V. When i checked the details of brown out detection for this voltage in the datasheet, I ...
0
votes
2answers
40 views

PIC18f45J50 2nd Serial port?

I am working on a GPS tracker Project where i need to interface with a GPS module and a UMTS module for 3g connectivity. with this i need 2 serial ports on a single microcontroller. For this ...
1
vote
0answers
28 views

Strange behaviour using PWM on CortexM3

I have a board with the ATSAM3S2BA-AU, which is a Cortex M3 uC. I need to use 2 PWM channel , here how I've done it : ...
4
votes
1answer
156 views

Why are the resistors all different?

In my upcoming project, I am working with a Microcontroller called the Microchip PIC32MX695F512H and a Wifi Module called the Microchip MRF24WB0MA. Since I am new to electrical engineering, I've ...
0
votes
1answer
88 views

Freescale, NXP and buying micros [on hold]

This may not be the right place to ask - and I apologise in advance, but I'm after some advice! I'm looking at putting to use the Freescale Kinetis KV31 micro in a motor control project. I'm coming ...
0
votes
2answers
84 views

Help Needed To Move From AVR To ARM

I have been working with AVR microcontrollers for the past 2 years and I am now quite comfortable with them. Like most people started with arduino but quickly felt limited by the options it provided ...
0
votes
1answer
52 views

power supply and transfering data from smartphone via jack 3.5mm 4pin

In my Project, I was wondering if I can use the 3.5mm jack (4 pin) to transfer data and as power supply to my small circuit? So I'm just asking if it's possible? and if yes, can someone tell me how ...
2
votes
1answer
58 views

microcontroller bring-up

I'm in the process of assembling a microcontroller PCB design. It's essentially just a breakout board. I'm trying to think of the best way to test the board after assembly. My first thought is to ...
0
votes
0answers
23 views

Can Fez Panda II run C/C++ without RLP?

For a project I'm working on, I need to program a Fez Panda 2 to run on C or C++ in order to gain the necessary speed of reading data. However, I have been told to 'ignore RLP' as the program needs ...
-1
votes
0answers
24 views

Microcontroller to Android communication over Wifi [on hold]

Id like to establish communication between a microcontroller and an Android device using Wifi. What things do I need to look at (hardware and software) to achieve this (don't have any idea at the ...
-1
votes
1answer
64 views

CPU Core frequency [on hold]

I was going through the selection criteria of CPU (MCU/MPU/FPGA) and observed that core frequency is one important parameter while selecting a CPU. But I was unable to get information regarding, how ...
0
votes
0answers
34 views

If a sensor has both voltage and current outputs, how to calculate Vgs of the E-MOSFET?

If a sensor has both voltage and current outputs and connected as the Vin at the gate of a EMOSFET, how do I calculate the Vgs of the E-MOSFET? The Vout goes as the input for a microcontroller, where ...
-3
votes
0answers
19 views

fingerprint R303 interface with 8051 [on hold]

How to interface fingerprint module R303/5 with 8051 controller i need reference code for add,search,empty and delete particular id
-2
votes
1answer
45 views

Max frequency of a component? [on hold]

For example, an SCR, is this the maximum frequency you can send a 'on' or 'off' signal from an Arduino to it, or is it the maximum frequency of say, 30V flowing through it? Please let me know, I ...
0
votes
0answers
24 views

Arduino IDE with Intel Edison on a mini breakout board. Cannot get LED to blink

I have an Edison and I am attempting to blink an LED and so far I have been unable to do so. I suspect that the Arduino IDE is trying to map the IO pins to the actual Arduino expansion board for the ...
0
votes
3answers
61 views

EEPROM Microcontroller

It is just a general question. I have designed some micro controller boards with On-Board EEPROM. This EEPROM is to store some configuration parameters for program like calibration data and system ...
3
votes
2answers
374 views

Fesibility of using “computer RAM” with a microcontroller project

How feasible is it that I could connect the pins of some garden variety "computer RAM" to a microcontroller for use as external RAM? Is there specific hardware used on computer motherboards that help ...
2
votes
1answer
86 views

Using LEDs to indicate if a toilet is occupied or not?

We have two toilets in our office. I want to setup two LEDs in rooms that show which toilet is occupied and which not. How can I do that?
0
votes
1answer
70 views

Question about MCU's, and Audio Manipulation

Ok, so I've been doing some research trying to find something like an audio MCU\DSP with a built in audio filter; for instance, something that I could manipulate audio with to get a final filtered ...
0
votes
0answers
33 views

Bootloader for AT32UC3C264C

Thank you in advance. I am trying to program a bootloader for my AT32UC3C264C chip. I want to update my firmware using bootloader. I haven't have experience with bootloader before but I did some ...
0
votes
0answers
3 views

Which components to built remapping keyboard via USB in + out (remapped) [migrated]

I know that it's fairly easy to change the emulate keyboard and mouse by Arduino. But I'm quite specific about the goal I would like to achieve hence I would appreciate if you could advise me which ...
3
votes
1answer
78 views

Crystal oscillator problem

Here is the datasheet of the crystal (32 MHz) that I use for a MCU. The right layout is an older version of my board which totally works fine. The left one is the newer version where I placed the ...
0
votes
1answer
41 views

IC for Trickle Charging vs. Fast Charging a NiMH rechargeable battery using solar and wall charger?

I want to use a solar panel to extend the use time of 3 NiMH AA's in series to power a microcontroller. The solar panel is rated at 1 W with a max load voltage of 6.4 V and the product page is here. ...
0
votes
0answers
33 views

multiple RGB LEDS on minimal pwm pins VS current limitions

the theory explained at Hooking up multiple RGB LEDs while using a minimal number of PWM pins on an Arduino? isn't really working with the arduino current limitations mentioned at ...
0
votes
1answer
66 views

Connecting Microcontroller to Higher potential

I am curious how to determine what voltage is acceptable to connect to a micro-controller through a resistor. From the data sheet the highest voltage on a GPIO is 3.8V. So If I have 5 Volts going ...
0
votes
0answers
43 views

Mechanical Relay Protection (Controlling AC mains devices)

Trying to make a ucontroller controlled relay to switch mains AC devices. It would have a type M plug on one end(to plug in mains socket in the wall) and type M socket on other end(to plug in the AC ...
-2
votes
1answer
50 views

Can arduino coded as i code in avr? [closed]

I know the avr (not like as a pro) coding . And also designed some simple system like sun tracker ...etc. now i want to use arduino for its fexibility .but can i write programme in arduino as avr . ...
1
vote
1answer
36 views

AVR's and DC Motors\Servos

I've been browsing around looking for some information on motors\servos and AVR's (my MCU of choice). Motors\servos are in my gray area, meaning I'm still not too into them, but I could do something ...
1
vote
1answer
84 views

Blinking an LED as a function of signal frequency

I wrote a function for interacting with my 'PIC16F1788'. The code sends pulses out the 'RC4' port at a specific frequency, to make an LED blink according to that frequency. So the LED will blink ...
3
votes
2answers
175 views

How to check frequency of MSP430 clock?

I'm working on a project in which an MSP430 is used to provide the timing for some stuff where accurate timing is important (it can be off by 10%, but not by 2x). This is driven by the timer A0 ...
1
vote
3answers
98 views

Automatic agricultural robot using 8051 [closed]

I want to build a automatic agricultural robot for my final year diploma project. The basic idea is to program 8051 to drive the robot in a fixed path in farm for ploughing the farm which i am ...
0
votes
2answers
65 views

Shift value to some point in binary number

I wonder if it is possible to do the following. For instance, I have a number 00001110. I am shifting it left. -> 00011100.... But the question is if it possible to start setting value in carry flag ...
0
votes
0answers
56 views

Really weird AVR issue

So the other day I was changing some fuse bits on a 324p and screwed up. Well I set up a 88A to act as a clock out. Great. Well I went through 4 different chips, including a 48A, because of some ...
0
votes
0answers
45 views

Programing other Atmel ARM chips using Arduino [migrated]

Ok, i know professionals generally hate Arduinos, but I would like to know if it would be possible to program Atmel ARM chips using the Arduino IDE. By which I mean, not needing to modify the source ...
0
votes
0answers
35 views

Atmega32 LCD program not working

i have recently been into atmega world after i heard it is much better than pic and it is my second tutorial about writing to LCD i wrote this program in atmel studio but it doesnt work i double ...
0
votes
1answer
48 views

Programming 16F84A With K8048 software & a custom Hardware (With CH340 USB2Ser)

After reading Manoj's Work about how to program some PICs with USB to Serial Adapter, I decided to try myself to program the 16F84A with my CH340 USB-SERIAL adapter Materials : Software : Cygwin + ...
1
vote
1answer
41 views

Atmega328 fast PWM (mode 15) on timer 1 not working

I cannot get PWM to work using mode 15 (a fast PWM) of timer 1. It's always giving me a high value of around 4.5V on PORTB2. ...
0
votes
0answers
27 views

Resources for learning assembly on a 68HC12 board [closed]

So in my microprocessors class this semester we were assigned a Dragon_12 Jr microcontroller. I have been looking for resources for this specific board but I have not had any luck. I barely have the ...
0
votes
2answers
72 views

test steper motor without microcontroller

i'm very new for microcontrollers as well as step motors .i have a idea to make a cnc based pen .so i get a step motor with uln2003 stepper motor driver.but i have ...
0
votes
0answers
25 views

how to write program that microcontroller pin as input as well as output at different time..? [duplicate]

Can I program the 8051 uc pin as input and output..? I want to get data from one pin and send some data to same pin as output???
0
votes
2answers
73 views

AVR Rapid Fire Mod… I hit a wall and need some help

Title says it; I'm making a rapid fire mod chip with the 328p family of chips right now (I'm going to scale down to whatever the smallest chip is that will safely hold the final software). I'm a fan ...
1
vote
1answer
60 views

Bypassing input capacitor with a microcontroller

I am designing an amplifier stage and I would like to be able to switch between AC or DC input coupling. How do I achieve this with a microcontroller? I was thinking about using a relay, but it ...
-3
votes
2answers
60 views

PIC microcontroller - port b working [closed]

Can someone please explain to me how this port works?
0
votes
0answers
56 views

RGB LED array without current limiting resistors but PWM

I found this blog post, where it says: Alternatives to using current limiting resistors: Resistors are a simple way to limit current, but they are not efficient. Excess power is wasted as ...