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.

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38 views

PIR Sensor University Project

I'm working on a project to use PIR sensor to save on electricity bill in a university, almost a fresh graduate in Electronics Eng. Load is Fluorescent tubes 44w each via ballast,there will be ...
1
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1answer
43 views

Flame sensing using Flame Rod and Short circuit identifying

I am sensing a flame using a flame rod. I am using 12V AC at the input and at the output flame sensing circuit which is made of opamp, some resistors and capacitors, I get 1.6-2.4V when there is a ...
-4
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0answers
22 views

Robot not coming online [on hold]

We require to program a IR52c robot in our lab. The programming is done using an interface and driver in dos environment.But when using the interface, its showing 'the robot is not online'.Its a ...
1
vote
1answer
34 views

PIC10F200 internal clock

I am trying to calibrate the internal clock to turn on a output once for 3 seconds every 7 days within a few minutes accuracy. I was able to accomplish this using the OSCCAL register in the chip. The ...
0
votes
1answer
71 views

How to disable a microcontroller port once enabled?

I'm using MP430 series microcontroller. The functionality of the code is to do a specific task and then don't do anything (sense the tilt and glow an LED in a fixed amount of time). But due to some ...
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0answers
31 views

PIC18F2550 PWM Square wave generator

I am trying to generate a square wave on 50% Duty Cycle using my PIC18F2550. The signal is to be outputted through a loudspeaker. The frequency does not really matter, as long as it is in the hearing ...
-5
votes
1answer
39 views

Large timer interrupt instructions [on hold]

Assume that it takes the micro-controller 1 microsecond to execute an instruction and the timer overflow has also been set to 1 microsecond and in the timer interrupt handler we have some instructions ...
-7
votes
1answer
71 views

help me with 32-bit ADC [on hold]

I want to use 32-bit ADC, suggest me any uC if there is any otherwise any microprocessor...in short I have simply no idea how to start working with 32 bit ADC help me on that too
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1answer
52 views

Why the pins of a port in some microcontrollers are not in order? [duplicate]

In some ICs the pin numbers are not in proper order. For example, in msp430x12x2 series (following pic). In the pic, why don't P2.0 be available at pin 20 (or adjacent to P1.0 ??) Why is that few ...
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1answer
50 views

Variations in pulses generated and read by a uC

I have a 2 uC's(LPC1778 and a PIC), that perform 2 separate functions. The PIC generates pulses that are coded,where each bit of the code has a pulse duration of 1ms and a complete code is 8 bits ...
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2answers
54 views

atmega328p GPIO with 3.3V regulator reads 2.5V at pin when High

I am driving the enable on a boost regulator and the boost is not turning on. When I checked the voltage on the enable, it was 2.5V. The boost worked on an identical set of boards I tried before this ...
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1answer
34 views

Selection of Microcontroller and Evaluation Board for Automotive Research Project [on hold]

I'm looking to prototype a microcontroller based design that will support communication over a variety of vehicle protocols. Initially, I'm looking at a high level set of requirements such as: 2x ...
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2answers
137 views

All LEDs died yet rest of board fine; why?

I had a board with 3 LEDs, two driven by an AtXmega325e and one simply connected to the rails. The rails are 3.3V, the series resistors 70ohms. simulate this circuit – Schematic created ...
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0answers
18 views

coding to set MAC and IPaddress using ENC28J60 as slave and PIC18F46K22 as master

I am currently working on PIC18F46K22 as master and have planned to use Ethernet communication by using ENC28J60 as slave through SPI interfacing , i could do the hardware connections but not able ...
0
votes
1answer
51 views

Tiny pulsed tone generator [on hold]

I'm looking for a small integrated IC which can generate RF pulsed tone repeatedly. My goal is to attached such pulsed tone generator on insects like bees, so I can track them on field. I have seen ...
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0answers
47 views

i want to understand this circuit , any help? [on hold]

what is this circuit it is required to simulate it on matlab
-3
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0answers
46 views

How is programming done on a NXP MC9S08? [duplicate]

I am wondering how a NXP 8-bit microcontroller unit is programmed? Is there any kind of programming unit such as an AVR ISP MKII (for atmel) or a ST-Link (for STM)? Edit: I would also like to know ...
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4answers
73 views

Working display connected by GPIO pins to microcontroller?

Would it be possible to add a normal HDMI port or a display to any microcontroller with the GPIO pins? (I didn't buy anything yet, I'm just getting information before I buy...) EDIT: Thanks for all ...
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0answers
30 views

SPI protocol master 32 bit and slave 16 bit

I am using a 32 bit SPI controller (MicroZed board Microcontroller) as the master and my slave is a 16 bit IC (custom IC) that I need to configure in a memory mapped I/O fashion. These are my ...
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0answers
46 views

Which ARM Controller to get started? [closed]

after i got some experience with 8-bit controllers i am wondering which ARM controller i should get to build a breakout board with it? The controller should be easy to program and there has to be an ...
0
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1answer
41 views

Atmel SPI Serial EEPROM Writing Error - Page Write?

I'm using this EEPROM: Atmel AT25640B SPI EEPROM DATASHEET It seems pretty straight forward to operate and I've followed the datasheet closely when coding my driver. I seemed to have some success ...
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1answer
40 views

U16 takes more time than my U32 for sine operation

I was doing a performance monitoring for my sine function and interestingly when I use the variable a in the sine as 16 bit unsigned types it takes more time to calculate than when I use the same ...
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0answers
23 views

Device descriptor stall on windows, works on linux microchip mla

I'm designing a USB device with Microchip's MLA v2015-08-10 on a PIC24FJ128GB202. The device works as expected on my Fedora 23 Linux system. It enumerates and is recognized as a HID device. On ...
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1answer
101 views

Calculate the impedance and phase angle of a capacitor

I’m trying to calculate the impedance and phase angle of a capacitor in software for a microcontroller project I’m working on, and I’ve included a pic of what I mean (not to any scale). I’ve ...
2
votes
3answers
108 views

How do I control the brightness of an LED street light

I am currently using a DC-AC ERI Solid state relay (Model number 001J) with a PIC16F microcontroller to control the operation of an LED street light. I have dumped a PWM code onto the microcontroller. ...
0
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1answer
54 views

MCP3008 reading wrong values

I'm currently using an MCP3008 ADC with Raspberry Pi and interfacing them with the wiringPi library. To test the MCP3008 was reading the values properly I set up a voltage divider with a 100kΩ ...
2
votes
1answer
54 views

SPI to Numerous Chips on Different PCBs with FFC Cables?

I want to drive numerous chips on several different PCBs with SPI from a microcontroller over FFC cables. Here is a crude diagram: UPDATE: Green wires are ground scheme I have never attempted such ...
1
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1answer
47 views

Priority among prioritised interrupts

I am using 2 interrupts on LPC1778. One for CAN and one for timer. The CAN interrupts whenever a new message is received. The timer interrupts every 200uS. The priority for timer interrupt is the ...
4
votes
1answer
67 views

How do custom security certificates find their way onto mass manufactured products?

Amazon and Microsoft both have IoT services that manage message and state brokering. These sort of services generally require machines to have unique security certificates embedded into the firmware ...
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1answer
61 views

How to connect micro-USB to voltage regulator for MSP430 microcontroller?

I am going to use a micro-USB to power my MSP430 microcontroller. That means I only need the 5v and the GROUND pin. However, after discussing that the other pins should be untouched.. my friend said ...
0
votes
1answer
29 views

Programming USB OTG PIC32 through USB in MPLAB

I have a PIC32 that has USB OTG. How would I program it through a USB cable in MPLAB? Does it work out of the box of does it need additional software.
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votes
1answer
66 views

How does I2C work? [closed]

WARNING: I HAVE NEVER DONE I2C BEFORE. Hi. I need to connect 2 I2C devices to a PIC microcontroller with a single I2C port. I saw this answer where two I2C devices were connected to an Arduino. ...
-1
votes
1answer
29 views

What display and controller to use [closed]

So I intend to produce a prototype for idea I am have, this idea works off a screen a a micro board, I do not understand much about the subject but I indent on having a screen (7") which I will be ...
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0answers
35 views

Series Gate Resistor needed at low Capacitance?

even though this question has been answered before for various scenarios, I would like to ask for a generic advice. So I want to drive a certain resistive load from a microcontroller pin. Let MCU be ...
-3
votes
0answers
17 views

Capacitive touch sensir QT1011 wiring? [closed]

I want to read BPM from capacitive touch sensor, in the datasheet it is indicated that if we pull-up the output we obtain bpm signal, but if we want to read it on an microcontroller we must have 2 I/O ...
-1
votes
1answer
54 views

MIDI Controller with an ATmega328p [closed]

Could one detect presses and releases from a 11 by 6 matrixed keyboard and send data from USART with just an ATmega328p microcontroller? I want to send MIDI notes from an old 61 key Yamaha keyboard ...
-1
votes
0answers
33 views

MCU to use for a RC Toy [closed]

I am trying to develop a remote controlled toy, with a frequency of 2.4Ghz. When looking for components, I found the CC2650F128RGZT, and the ones from Beken that seem appropriate for me. But I wonder ...
1
vote
2answers
57 views

Bricked atmega32 with fuse bits

I accidentally selected the wrong clock in atmel studio (8-12MHz RC Oscillator instead of 8MHz crystal) and I'm trying to figure out how I can un-brick it now. I have an arduino on hand and a friend ...
1
vote
3answers
54 views

How can I tell if a serial connection is sending bytes okay?

I have a Teensy connected to a Pololu motor controller. If I send bytes over USB (using Pololu Serial Transmitter v1.3) I can get it to work (For instance, 0x85 0x00 0x20 makes the motor run at slow ...
0
votes
0answers
22 views

PICkit 3 Programs, Erases but fails on other functions

I recently bought pickit 3 with pic32 microcontroller, however I'm struggling to resolve some issues. I hooked up the PIC32MX320F064H in similar manner shown below, the picture belongs to the ...
0
votes
0answers
43 views

Interfacing a TFT LCD display with a pic/ microchip [closed]

So my intentions for the design is to use at TFT LCD display ,like this ...
1
vote
1answer
72 views

Not enough digital outputs for SPI slave select lines (CS#)

I have a microcontroller with only 4 digital outputs available and 4 digital inputs. The problem is that I need to communicate with at least 4 SPI devices (ADC's and DAC's). 4 SPI devices means 2 ...
1
vote
1answer
47 views

Measuring DC current with Hall Effect sensor over PIC on the same circuit

Before I begin with my question just so you know I'm not very familiar with electrical engineering so please forgive if I ask some dumb question :) What I want is to know if I can use Hall Effect ...
3
votes
2answers
95 views

Is it safe to drive P-channel MOSFET gate directly from an MCU pin and 12V pull-up?

I was wondering how reliable it would be to drive a P-channel MOSFET directly from a micro-controller pin like this: simulate this circuit – Schematic created using CircuitLab When I ...
0
votes
2answers
86 views

How to connect multiple micro-controllers' USB ports on the same PCB?

I'm designing a PCB with 3 Atmel ATmega16U4-AU micro-controllers on it. I will be programming them through SPI. Therefore, I will not be using D+ and D- ports on the USB interface. Then how do I ...
0
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2answers
92 views

Confused about how microcontroller board and computer communicate

i recently got myself FRDM K64F board and got myself occupied with the following questions : Does the compiled hex code i send to my board has to go to the uart chip prior going into ...
0
votes
0answers
8 views

ADE7754 irms value

i am using ADE7754 to measure 3 phase voltage and current. I am able to read voltage values, but not the current. Micro-controller that i am using is ATSAMD20e18. Can anyone help me out with this ...
1
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2answers
61 views

Decoupling a Microcontroller/Development Board Design

Im trying to design a broad purpose microcontroller board (developement board?) to send off to a fab house to then use in future projects. The micro being used is an ATtiny861A. Referring to the ...
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0answers
40 views

use of ISD4002 SPI with FPGA

I am trying to build a circuit that would be some kind of INTERCOM and will be controlled by FPGA (cyclon 2 by altera ) . Because I need to have multi voice channels I choose ISD4002 because in my ...
-2
votes
1answer
38 views

What is the difference between “FS Device”, “FS Device/Host/OTG”, and “HS Device/Host/OTG”?

I'm going to buy a PIC32 which has inbuilt USB support. What is the difference between "FS Device", "FS Device/Host/OTG", and "HS Device/Host/OTG"? Am I right in thinking that the "OTG" aka "on the ...