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.
0
votes
1answer
32 views
Picking a bluetooth module
I've recently acquired a lpc1313fbd48 microcontroller and I was looking around on newark.com for a bluetooth module that I could use to connect my microcontroller with my phone. I then began to if ...
0
votes
1answer
75 views
Calling ports in C on my microcontroller
I have been developing a small OS for my lpc1313fbd48. I am sending all of the C and assembly code in a binary file. I want to be able to call the ports in C and have an LED turn on for a few seconds ...
-4
votes
2answers
48 views
Dtmf based robot [closed]
Does any one know any thing about connecting the audio phone jack to micro-controller.
I am making a DTMF based mobile controlled robot and i do not know how to connect a 3.5mm audio phone jack to ...
5
votes
4answers
182 views
Why use a pull-down resistor with a LDR and microcontroller?
I am looking at this:
http://learn.adafruit.com/photocells/using-a-photocell
It's connecting VCC <-> LDR <-> resistor <-> GND. And the analog ...
0
votes
0answers
17 views
SmartCard, MagneticCard and RFIDCard Reader in a sngle module with RS232 interface
I difficult to find a SmartCard, MagneticCard and RFIDCard Reader in a single module and use RS232 interface. Most in the market is to use a USB interface, while I need RS232 interface. I want ...
15
votes
5answers
370 views
Is there a difference between using a built in SPI module and bit-banging?
Is there a difference between the two, or is it just a matter of abstraction? My intuition says there's no difference but I'd love to be wrong.
-3
votes
0answers
70 views
Microcontroller selection [closed]
I am looking forward to your suggestions to find a cheap and best micro controller which is around $1-$2 for bulk volumes with following bare minimum features i)GPIO - 30 pin ii)ADC -( minimum 8-10 ...
4
votes
1answer
94 views
How can I use a generic doorknob as a capacitive touch sensor?
I would like to use a generic doorknob that's installed in a typical wooden exterior door as a capacitive touch sensor. I have found various references for the circuit, but I have some questions about ...
5
votes
2answers
126 views
What's an alternate pin function on a microcontroller?
I'd like to know what "Alternative Function" refers to in the context of the IO ports of a microcontroller.
I don't need to know how to activate it when connecting to a peripherial, but I'd like to ...
10
votes
2answers
258 views
How did handheld video games from the 70's and 80's work?
I'm curious about how the early handheld video games from the 70's and 80's worked. You know, those small games with a LCD display with "fixed elements" meaning it was hard wired for one (or a small ...
-1
votes
0answers
44 views
Arduino Micro Clones? [closed]
I am using an Arduino Micro for a project I'm working on and I'm tempted to try out a clone. Has anyone had experience with using an off-brand board? My main question is regarding the IDE: are there ...
3
votes
3answers
80 views
Energy efficient one button on/off with extra function
(Old) cellphones have a button to turn it on (when off), end a call (when on, short press) or turn it off (when on, long press).
I need something similar for a microcontroller. The device is ...
2
votes
6answers
98 views
Switch transistor with a low voltage and current
I'm designing a circuit that will use a combination of switches and resistors to allow a microcontroller to identify which switch was pressed based on the voltage read and perform a switch-specific ...
0
votes
3answers
70 views
Synchronizing SPI ports for higher data rate
I am designing a new board which uses the NXP LPC4330 (Cortex M4 microcontroller) with a XESS Xula2 FPGA development board. In this design, the Xula 2 has limited I/O pins since it is designed to fit ...
-3
votes
0answers
39 views
How to Start with Pic18f controller and ENC28J60 configuration [closed]
I am a newbie to ethernet control operation using pic18f controller and dont know how to configure my Olimex ENC28J60-H Board with PIC18F controller using SPI communication. However i have written ...
-9
votes
1answer
67 views
Circuit Diagram Controller [closed]
I want to make a circuit diagram which will:
Read the speed of a servo
Divide the speed of servo
With the result of the division will be controlled the speed of an other motor like this: Servo ...
-3
votes
0answers
75 views
Microcontroller, ARM, and FPGA [closed]
I'm going to study Wireless Sensor Network. I'm looking for a good way for understanding micro-controller, ARM and FPGA: i mean books, free technical materials available on the web, like university ...
-4
votes
1answer
72 views
Programming micro controller using shell script [closed]
Is there any possibility that you could program a micro controller using shell script in bash shell.
0
votes
1answer
59 views
What is an MCU program trace?
I have read in a few places about Atmel's support of program traces on their high-end debugger/MCUs. It seems to be that some of the AVR32 processors can be 'traced' by the AVROne! ...
1
vote
1answer
87 views
implementation of a large number of outputs (1024+)
I want to control 32x32 (or even 64x64) pieces of electroluminescent or electrochromic film with a microcontroller.
Film itself will be driven by supertex hv816. Planned refresh frequency 2-4Hz.
...
1
vote
1answer
77 views
Linear useage of excess power generation
A friend of mine is fortunate to have moved to a very warm and sunny country, and has installed a photovoltaic system on his property. This is grid tied and any excess that he generates flows into the ...
3
votes
1answer
67 views
Microcontroller power dissipation
I wanted to know how to calculate the power dissipation of a micro-controller. If I have the information on which pin is sourcing how much current, how can i calculate the power dissipation of the ...
1
vote
4answers
147 views
which RPM measurement method is suitable?
I have a PMDC motor which is electronically controlled for speed. And it is a closed loop system. A proximity sensor is there to measure the speed of the motor and there are 12 bolts attached to the ...
-2
votes
0answers
66 views
How to stabilize the value of ADC in PIC microcontroller? [closed]
I have been designing auto range multimeter using PIC microcontroller. Having problem in the auto range switching due to the ADC reading since ADC reading for particular voltage varies by 100 to 150 ...
0
votes
1answer
32 views
Is there a native bootloader in Freescale HCS12 micros?
I've spent a while programming the Freescale HC12 micros, but always with DBug12 already loaded in to facilitate program loading and debugging.
I'm working on a project using the HCS12 line, and am ...
0
votes
0answers
79 views
Is it safe to use a Relay to control my room lights with a microcontroller?
Firstly, I would just like to state that I'm a complete n00b to electrical engineering.
I'm thinking of controlling my room lights with a microcontroller.
The way I'm planning to do it is by placing ...
0
votes
0answers
50 views
Store data in built-in Flash of PIC at runtime using C code
I am designing PIC16F877a based project that counts the number of people in a room and turn ON the relays in accordance with that number like if 5 persons in a room then One relay would be ON. I want ...
3
votes
1answer
67 views
PICkit 3 & PIC16F684-ICD & AC16205 random success with programming
Like it is already mentioned in the title I have question regarding this dev stack:
MPLAB X IDE v1.80
PICkit 3
PIC16F684-ICD (datasheet)
AC16205
There is image of how things are connected (I don't ...
3
votes
2answers
78 views
Developing for TI's CC430F5137 MCU
I'm developing an embedded systems project (I'm quite new to the area) and I have determined that I want to use the CC430F5137, my problem is: How can I develop for it?
From cross-compilation, to ...
1
vote
0answers
72 views
16 x 2 LCD not displaying analog inputs fed to ATmega168
I am experiencing some problems getting a display of analog inputs(current and voltage) fed to ATmega168's A0 and A1 respectively. I believe the wiring and the program are correct since the same ...
0
votes
1answer
38 views
What are different media for uC (microcontroller) to store data that shall be input to a PC later [closed]
Well we can have a uC Embedded device that will use a chip to store data somewhere on the PCB. Than it can have firmware that will enable one to gain access to this data by means of a USB connection ...
-5
votes
0answers
35 views
Help Creating 4 To 1 Mux Using 8051 Microcontroller [closed]
I Wanted to Create 4 to 1Mux using 8051 Micro controller Using assembly Language..
Can any body Help Me On That
0
votes
0answers
42 views
Connecting RJ11 output to TTL to USB converter input through 5 pin TTL
I have a problem in connecting output of RJ11 to TTL socket of the TTL to USB converter.
Actually, I have a micro controller based device which has an RJ11 female port having six pins in it, which I ...
2
votes
2answers
136 views
Expanding Range Of Analog Values From Temperature Sensor
I'm trying to build a temperature controlled relay module with an ATtiny45 ( Arduino UNO R3 as ISP ) and a NXP KTY81-222 Temperature Sensor.
The temperature range i want to monitor is 20°C to 30°C.
...
-4
votes
0answers
57 views
What is the source code for CV AVR for LDR? [closed]
I need to interface LDR with micro controller.
I use a voltage divider circuit with another resistor and input that into ADC port of micro controller (ATMega8535)
The problem now is how to make this ...
1
vote
1answer
72 views
Using STL with ARM microcontrollers
I have an NXP LPC1769 which features an ARM Cortex M3.
I understand how to program it and have had success building both C and C++ programs for it.
I have some code that I want to port from Windows. ...
4
votes
1answer
219 views
Microcontrollers with extreme high temperature range
I am looking for components which works at high temperature. Especially I am looking for microcontrollers which works at 180 °C to 200 °C. I am designing downhole electronics for oil and gas ...
-4
votes
0answers
66 views
Voice controlled Home automation system [closed]
I am trying to make a voice controlled home automation system using PIC microcontroller.My idea is to first convert the speech to text using PocketSphinx and then send this text to the microcontroller ...
1
vote
0answers
49 views
Program to simulate seven segment display in atmel studio
I am using Atmel studio for the programming of atmega64 microcontrollers with a Cerebot board II.
Firstly, is there a program that can simulate a seven segment display device as if I was looking at ...
0
votes
1answer
80 views
Ethernet communication between 2 controllers
I'm working on establishing communication via ethernet between 2 microcontrollers.
Its a stand alone system. Controller1 will interface with the user via a keypad. Controller2 will be interface with ...
1
vote
2answers
104 views
USB device with a serial number and 3 LEDs
I'm looking for a way to build a USB key. I have a bit of experience with the Arduino, however for this project that seems to be a bit of overkill.
The key should contain a unique serial number ...
0
votes
1answer
55 views
Error While trying the program my ATMega16a with extreme burner
Whenever, i want to burn the hex file on my chip, always an error message appearrs,
Power On Failed
Cannot communicate with target chip
The programmer i am using is AVR USB programmer, ...
0
votes
1answer
46 views
Rtc on msp430 crystal 32.768kHz, low power
I need setting timer on interrupt every second. I use 32.768kHz external crystal, mcu is MSP430G2553. In addition to the need get under consumed 10μA.
I try this code but consumed was cca 80-90 μA. ...
0
votes
1answer
94 views
Programming an NXP - LPC1313FBD48
I was planning on flashing my mini os onto my NXP - LPC1313FBD48 (here is a link to where I bought it) but I wasn't really sure how. So I asked but I was told that I would need a serial to usb ...
-2
votes
2answers
67 views
Diagnosing and programming car/bike ECU's [closed]
I want to learn how to do this. I am interested in a universal programmer (if that exists).
Is there a machine (or laptop program) that i can connect to all cars and bikes and diagnoses problems on ...
0
votes
1answer
47 views
Can I monitor an ATMEGA406 using an Arduino Uno via SMBus?
I would like to build a small BMS using an atmega406 and then maybe use an Arduino Uno to show information about the cells on a computer or a small lcd
BMS = Battery Management System
Atmega406 ...
4
votes
2answers
115 views
Have I fried my Arduino UNO?
So I've recently been playing with my first Arduino, until it, for some weird reason, stopped working.
What I did:
I had it attached to a breadboard. When I say attached, I mean it was supplying ...
3
votes
1answer
80 views
DC Motor driver interfacing problem Atmega32 Board
simulate this circuit – Schematic created using CircuitLab
I want to drive 24V/5A DC motor with Atmega32. So bought motor driver having 24V/20A rating. But i am facing some issues :
...
4
votes
2answers
108 views
How to deal with multiple pull-up resistors on modules
I was thinking about doing a modules for a development board I did a few days ago that will include spi/i2c interfaces.
The problem is that I didn't included pull-up resistors in the MCU pins in the ...
0
votes
2answers
255 views
Creating a lookup table in a microcontroller using in C
How can I create a lookup table in a microcontroller using C? I have one input and one output and want to implement a lookup table in C.
