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
0answers
14 views

Problems Re-Flashing ATtiny85 After Setting prescale to 0x00

After flashing the ATtiny85 with code including setting the clock prescale to 0x00, the next time I try and flash I get the following errors preventing me from doing so: ...
-1
votes
0answers
21 views

audio input on microcontroller from RCA ouptut of SET-TOP box [on hold]

I want to take a only audio output from set-top box or any other receiver of TV through RCA cable or RF output on microtroller.I want to know how can i take it on my controller ADC and also which ...
0
votes
1answer
24 views

Atmega328P not starting up

I am playing with an atmega328p microcontroller to try and build a simple circuit which open/close a relay to control a garden light, my problem is that while the circuit works fine on my breadboard ...
0
votes
1answer
32 views

How to Identify faulty bus pins on LCD?

I've soldered 14 pins on the back of my LCD and connected to an AVR Microcontroller. The LCD powers on correctly and contrast is set correctly but I'm having trouble sending software initialization to ...
0
votes
1answer
41 views

Connecting ARM cortex m4 to the internet [on hold]

So I would like to connect my arm cortex M4 Microcontroller from TI to the internet through the home network. The purpose is so that i can remotely control something, lets just say an LED. Where ...
2
votes
1answer
46 views

What are these components in block diagram of STM32?

Today, when I was seeing in STM32F103RET6 datasheet I saw some odd things(also, they are odd for me, probably you have enough information about these). if look in 12P of datasheet, you will see this ...
1
vote
2answers
63 views

NPN BJT Relay Circuit will not turn off

I'm applying a 3.3V signal with my Raspberry Pi to the base of an NPN transistor to activate a SPDT 6V relay (relay data sheet, model G2R-1-S-DC6(S)). The relay pickup/dropoff voltage is 4.4/0.9V. ...
0
votes
1answer
37 views

What is each pin's output voltage of an ATmega328P?

I would like to operate an ATmega328P in 3.3V supply alongside some other 3.3V non-5V-tolerant-peripherals. I looked up in the datasheet but I couldn't find an answer as to what is the output voltage ...
0
votes
1answer
48 views

Counting PIC18F46K20 internal clock edges using MPLAB C18?

I am trying to create a countdown timer using the PIC18F46K20 and display the time on the OLED. I have set up TIMER0 to create a delay of 1 second ( T0CON = 0b00000001 ) so the variabe intCLKsecs ...
-2
votes
0answers
27 views

Counting PIC18F46K20 internal clock edges using MPLAB IDE C18? [on hold]

I am trying to create a countdown timer using the PIC18F46K20 and display the time on the OLED. I have set up TIMER0 to create a delay of 1 second ( T0CON = 0b00000001 ) so the variabe intCLKsecs ...
0
votes
0answers
43 views

Application of intel 8253 timer

8253 timer works in 6 different modes namely interrupt on terminal count, hardware-retriggerable one shot, rate generator, square wave generator, software triggered strobe and hardware triggered ...
0
votes
1answer
32 views

Equivalent of S27c512-20A PLCC for project

I've found interesting project for modification of an age old NMT Ericsson 430 Hotline mobile telephone to radio amateur station on 70 cm: ...
0
votes
1answer
61 views

Two interrupts for a single operation

I am using infineon XC866-1FR controller for my project. For the motor control, I am in need of exciting the coil by the combination of two external interrupts(external interrupt 1 && external ...
0
votes
2answers
38 views

Button cells for arduino uno

OK, before I start I know that there is significant difference and that the Arduino Uno is not designed to run off button cell batteries especially to run both the ...
6
votes
4answers
1k views

How different are 8-bit microcontrollers from 32-bit microcontrollers when it comes to programming them

Right, so we have 8-bit, 16-bit and 32-bit microcontrollers in this world at the moment. All of them are often used. How different is it to program 8-bit and 16-bit micrcontrollers? I mean, does it ...
1
vote
2answers
58 views

Would driving transformer with MCU's GPIO cause durability issue?

For making isolated power supply, I would like to drive a transformer with two GPIO's of a MCU. The center tab of the primary will be connected to Vcc. And each end of the primary will be toggled ...
3
votes
4answers
171 views

Dialing a miniaturized stargate

I want to build a miniaturized Stargate but I have no clue regarding the electronic part. The Stargate is a fixed circle with 9 chevrons (see links bellow). An inner circle is spinning inside the ...
1
vote
3answers
83 views

Using single resistor to receive 5v signal on the 3.3v rated pin

I have been investigating ways to safely receive 5v signal on the input pin that can only support 3.3v input signal. I came across an article that states that it's possible to only use a single 10k ...
1
vote
1answer
47 views

Does the LPC1343 MCU need an external clock for USB operation?

I am trying to design a board using the LPC1343: http://www.nxp.com/documents/data_sheet/LPC1311_13_42_43.pdf I would like to be able to use its on-board USB bootloader to program it. My question is ...
1
vote
6answers
153 views

Why is pin protection needed?

I have read this article about protecting input pins. One thing is still unclear to me — why is the protection needed at all with such a high resistance on the input pin inside of the ...
3
votes
1answer
116 views

How can some guys discern all parts of a MCU?

Today, when I was searching for find some dies, I saw these pictures: Now I'm curious that know how can some guys discern all part of a MCU? Is there any points that I use those to discern all ...
0
votes
0answers
26 views

How to use ADXL335 to detect direction of movement

I want to use my ATmega32 with the ADXL335 accelerometer to make a glove that works like a mouse. How to detect whether accelerometer is moved to the left or right direction. Any help would be ...
0
votes
1answer
33 views

How to read configuration bit register from PIC?

I'm debugging and want to inspect CONFIG1H (CONFIGURATION REGISTER 1 HIGH) of a PIC18F. CONFIG1H does seem to be recongized as an SFR when I enter it into the Watch window. After stopping at ...
1
vote
1answer
44 views

Adding Profibus capabilities to a product

We are currently developing a product and now the "idea" has come up to integrate Profibus since it is quite used in that specific area. Now I was wondering if anyone has made such a product. If I ...
-6
votes
0answers
72 views

Diy raspberry pi [closed]

I would like to know how to create a diy Raspberry pi like the arduino clone. Can some one show me a diagram of it? How to upgrade the ram how to install the os!!!
-9
votes
0answers
49 views

Is there any technology? [closed]

Is there any technology to capture aura of the body? What is the mechanism in that? That aura means the light or radiation which is give out by the body for certain feelings like anger calm???
1
vote
2answers
84 views

PWM generation PIC16F628A

I have followed the instructions in the data sheet and tried to generate PWM signal using PIC16F628A. However it seems to be not generating any output. My code is shown below. Any help appreciated ...
4
votes
3answers
170 views

Calculating time spent by a function in Microcontroller Applications

I would like to write a simple profiler for my STM32F100VE microcontroller. I have seen that I can include time.h and based on the c standard functions I can use it, but I was confused about ...
1
vote
2answers
55 views

How to create a circuit to reduce my H-Bridge Inputs from 4 to 2, much like the 4427 Dual Driver does?

My H-bridge is identical to the one here: http://www.robotroom.com/BipolarHBridge2.html I'm trying to reduce the number of inputs from 4-2 so I can control it with my arduino using the 2 inputs. In ...
1
vote
1answer
63 views

1/8" i/o components

Im looking to make a microcontroller that has one stereo 1/8inch input and one stereo 1/8inch output and a processor that can effect / filter the audio. Im looking around for microcontroller tutorials ...
0
votes
0answers
53 views

Do I need to use a programmable oscillator?

I can produce pwm signals with my mcu and I am intended to use this signal to feed another MCU's external clock input. But my output pwm signal voltage is 5V and I need peak to peak 2.5V signal and it ...
1
vote
1answer
128 views

An alternative to microcontroller as a clock generator

I use ATTiny2313 microcontroller to drive a linear CCD imager. That's all it does - an infinite loop that toggles six IO ports at different times. However, it is only a 20MHz controller. I calculated ...
5
votes
2answers
187 views

Attiny85 hardware interrupt unreliable, 433 MHz remote

SCROLL DOWN TO SEE THE SOLUTION (UPDATE II) ORIGINAL POST: I am currently building a 433MHz remote with two buttons. The remote is controlled by an Attiny85v(8MHz). Sadly it does not work very ...
0
votes
0answers
40 views

Suddenly program is not burning

I write a code for my MCU ckt and burn it in my MCU. I edit that code several times and burn . It cause no problem. Suddenly when I add a for loop in my code, when I tried to burn my code, it says " ...
6
votes
5answers
660 views

How to control three LEDs with two uC pins using just passive components?

I only have 2 (3-state) pins available on a microcontroller and need to control 3 red LEDs, uC is running on 5V. I can only use passive components in addition.
1
vote
2answers
93 views

Purpose/Usage of Boot Segments

I would like to find out more about the purpose of a boot segment, the segment of program memory that is declared by the user, and I would like to ask the following questions to have a concise ...
0
votes
1answer
41 views

Problems with I2C on PIC18F25K22

I've been googling for about two weeks now and I still can't seem to get my I2C working. I've used this (what seems to be complete) tutorial. I followed the Master Write and Master Read examples to ...
3
votes
2answers
155 views

Is is possible for a microcontroller with a single serial output to interact with two serial peripherals?

I'm looking into using Atmel's 2051 microcontroller with an Xbee and a HC-05 Bluetooth module, the micro however has only one serial connection and no possibility for expandability with ...
1
vote
0answers
62 views

Float calculations hangs on Kinetis K20 (arm-m4-no-fpu) when PWM interrupt is on

I will use this ARM to control Induction Motor with three-phase inverter. When the program encounters any float operations, like simple plus operation, the system hangs but the pause of debug works ...
0
votes
1answer
60 views

Controlling an ATmega328P via Wi-Fi

I am a software guy who hasn't been under assembler level. I have a project in my mind but I don't have sufficient knowledge on electronics. I have been searching in the internet for help, but I ...
1
vote
2answers
70 views

Serial Data Input through Microcontroller to Output Voltage

I am new here and new to programming, so I thought maybe some of you might be able to help me in the right direction. I am looking to design a circuit that receives serial data from an RS232 port on ...
1
vote
0answers
31 views

Atmega328 NFC cannot wake

I'm trying to communicate my 328 with DFRobot's NFC Module a while now, but I cannot wake the card. Below is my code, where I use DF's instructions on how to make the card work. I write what card ...
0
votes
2answers
104 views

A Beginner's Question: 32 bit vs 8 Bit [closed]

I am in the process of getting started with electronics, and I have come to a crossroads. Being a complete beginner, should I start with 32 bit microcontrollers (specifically Atmel's UC3 series), or 8 ...
1
vote
0answers
45 views

Programmer fails to connect to the target MCU [duplicate]

I'm trying to program/debug/erase a Freescale MC12311 transceiver IC (which has an HCS08 MCU embedded in it) via the 6-pin BDM header, using a P&E USB Multilink Universal, and CodeWarrior 10.4 ...
0
votes
1answer
70 views

Circuit to provide 0-5 V output proportional to 0-30 A from C.T?

I want to design a circuit to protect oveload current of 30A.I have a controller board(PLC) which accepts the voltage range of 0-5 as an input and C.T with 1:7000 turns which can maesure 0.5 -60 ...
2
votes
1answer
202 views

Differences between mini USB and micro USB in circuit design?

Hopefully a quick and silly question - I am looking to modify a reference design such as this one: http://www.microbuilder.eu/Files/Projects/LPC1343RefDesign/LPC1343_Schematic_v1.6.pdf And was ...
0
votes
0answers
59 views

Writing a framebuffered driver for ILI9230 LCD Controller

I'm using STMF32F103VE to control an ILI9320 LCD Controller, the datasheet is here: http://www.gpegint.com/files/library/files/supportpdf/ILI9320.pdf I have problems of copying the framebuffer ...
0
votes
1answer
57 views

How to use MOSFET thermal data for simulating in software

I have a MOSFET (irfb7434pbf) acting as load switch in a circuit. The usual operation is well within the SOA region, but, on situations where the load would short circuit, the MOSFET is set to limit ...
0
votes
1answer
60 views

Monitoring USB Keyboard Input with Microcontroller

I am currently working on a project in which I would like to be able intercept a specific key combination from a standard USB HID keyboard with a microcontroller. The purpose is to use the keyboard to ...
0
votes
0answers
24 views

Can't read the SPI buffer of a PIC32MX

I have some problems with my SPI communication. Indeed, I have configurated the PIC32 as master, and it communicates with a slave which is a memory. The communication works perfectly. LEGEND : In ...