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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12 views

How to modulate a LED to send data and recieve with a photodiode

What is the concept of modulating a light source (white led, IR led, etc) to send data and then demodulating it with a photodiode back into data? I am wanting to experiment with trying to use ...
0
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0answers
20 views

Communication with a database - assignment

i'm a second year student of electronics and comupter science. I was asked to implement a system which works with a web application. Application should enable displaying information about current ...
2
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2answers
65 views

Bad idea? Powering uC from two separate supplies?

Okay, a little background: I am designing a micro controller daughter board (uCDB) that is nominally powered at 3.3V by a voltage regulator on a mother board (MB). Also I will have a programmer board ...
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0answers
11 views

CN Interrupt (interrupt on change) on PIC32mx not working

I attached a module which communicates with my PIC32mx via UART. I am trying to bit banging this UART communication but I am not able to see the interrupt being triggered. I am using the CN4/RB2 Port ...
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0answers
59 views

PIC C program flow problem XC8

Problem: My C code is not running to the end. To test my EEPROM read and write, I decided to write a simple array and read it back to different array using a PIC. However the problem is not the ...
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0answers
36 views

stm8s I2C Communication

I want to use I2C Communication between two stm8s208cb MCUs. I use stm8s standard peripharel library. My code: Master: ...
1
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2answers
327 views

How to implement a “circuit breaker” for an air cylinder

Basically I have a machine connected to the end of an air cylinder, a paint mixer to be specific. I want to implement some kind of device that won't allow the mixer to be turned on until the air ...
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votes
1answer
70 views

Microcontroller freezes on high loads [on hold]

simulate this circuit – Schematic created using CircuitLab First timer on the forum and I'm asking for your help. Background: I've build a car with the exact same setup and it worked ...
0
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1answer
55 views

What's wrong with my simulation for Bi-directional logic level converter?

I am trying to make a simulation by using Multisum 14 for i bi-directional channel for Logic level circuit from SparkFun which use Philips AN97055 IC as a Bi-directional level shifter... The ...
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2answers
63 views

Setting up Internal Oscillator with PIC16F1829

I just started working with PIC microcontrollers and I am currently using MPLAB X IDE with a PIC KIT 3. I've been trying to get a simple LED blink code to run on a PIC16F1829 using the internal ...
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1answer
37 views

Resolving interrupt-on-change mismatch conditions in a PIC16F877

I am using pic16f887 to quickly simulate encoder to later use it in a bigger project. reading signals from A and B encoder using interrupt on change for portb and the program was : ...
0
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1answer
30 views

Using 320QVT TFT display module with stm32f407

I'm having a bit of trouble trying to get a small 320QVT TFT module up and running. The documentation available is quite vague, but I know the module used a SSD1289 TFT driver, and that 16 address ...
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1answer
107 views

how to separate a analog sine wave to positive and negative using ADC and DAC?

I have an AC signal which is 20V peak to peak and has a frequency of 200kHz. I am interested in reading this into an ADC. I am not familiar with how this is done and would like some tips. How do I ...
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0answers
19 views

how to measure GCLK clock for RM48L952 (using RM48 board)?

I am working on RM48 board for some project, using SPI too. For this I need to show the GCLK clock value (on oscilloscope for documentation) for requirement to get the SPI speed desired one. In ...
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0answers
52 views

220v buzzer causing pic to reset

i'm using this circuit to drive an AC 220v buzzer which cause my pic microcontroller to reset (which does not happen using a lamp), i currently use the following set up which helped me with the ...
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0answers
36 views

Microcontroller with high-speed, high-resolution ADC? [on hold]

I am looking for a microcontroller with the following specs: ADC ( >=16-bit, >=3 channels, >=200ksps per channel) USB connection I am trouble finding any microcontrollers with these ADC specs. Is ...
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0answers
36 views

Velleman KA02 Problems [on hold]

I recently bought a Velleman KA02 Arduino Audio Shield (http://www.velleman.co.uk/contents/en-uk/p579_ka02.html), which uses an ISD1760PY audio chip and soldered it together. The first time I fired it ...
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0answers
10 views

nRF24L01 TX_DS/MAX_RT never

I have strange problem with my nRF24L01+. I'm trying to add nRF24L01+ support to my library for AVR mcus. I'm able to communicate with the device via SPI. I can read, write... But I'm not able to ...
2
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1answer
39 views

GSM modules and ICs

I have been looking for GSM modules and found some very interesting devices, such as the SIMCOM 7100C and similar. The "problem" I have with these is that they are very high-level, that is, you can ...
2
votes
2answers
136 views

How can I write high-speed A/D data to an SD card?

I want to use a microcontroller and A/D converter to do some high-frequency (~100 kHz) long-term (minimum of five second buffer, looping until triggered) data logging. It looks like a good way to do ...
-5
votes
1answer
79 views

USB Memory Stick From Scratch [on hold]

How can i make USB memory stick from scratch? As far as i know i need NAND flash memory chip and NAND controller chip. Which two should i use, can u recommend something and which firmware should ...
3
votes
1answer
158 views

Correct way to power from USB and or VIN?

I am using a STM32F105FBT6 to create a CANbus analyser. I plan to have a simple PC application that displays the CAN messages and lets the user put messages onto the Bus. I also what to be able to ...
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2answers
34 views

Multipurpose momentary button - microcontroller/arduino/esp8266

as more of a hobbyist than a pro I apologise if I'm asking the wrong questions, however I have been researching for a while and hoped Stack exchange might help. I've read a few articles on low power ...
3
votes
1answer
48 views

Test hardware/software for pin access

I wrote a number of microcontroller GPIO libraries (essentially set pin direction, set pin, read pin, read pin as analog input). I'd like to create an automated test to verify that my library indeed ...
0
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2answers
88 views

Is it possible to implement a fail-proof watchdog timer in software?

I want to add a piece of code for watchdog timer within my source code so that the board resets automatically when programs hangs. I am using Mediatek Linkit One board.
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2answers
63 views

Unidirectional motor control

I am interested in controlling the speed of multiple small DC motors that will draw at most 1 amp each. I only need to run them in one direction, so an H-bridge IC like the SN54410 seems like the ...
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vote
2answers
68 views

CAN bus possibilities?

Is it possible to add something such as a micro controller to act as a new node that will integrate into the can bus system and be dominate over other nodes or at least speak on the bus to work what ...
1
vote
1answer
52 views

PICDEM board and Linux connection through serial

TL;DR: I can open screen or putty session in terminal to the /dev/ttyUSB0, but characters ...
0
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0answers
21 views

Connecting Capacitance-to-Digital IC to XBee

Do I need a microcontroller to connect a capacitance-to-digital chip to an XBee module? I want to build a soil moisture monitor that transmits data via XBee modules. I have decided to measure soil ...
0
votes
1answer
44 views

What does the GSM AT+CSQ command output signify?

So the command returns the received signal strength(RSSI) and bit error rate(BER). I see that the RSSI is obtained even if the SIM card is not inserted in the GSM module. So what does RSSI signify? ...
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0answers
42 views

linux can't detect PICKIT2

I have installed Arch Linux (i686) every thins works fine but when I try ti plug the PicKit2 (Programmer for PIC MCUs) and run lsusb it doesn't shown in the list I tryed it on Win7 machine and works ...
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0answers
36 views

MICROPROCESSOR ADDRESS DECODING [closed]

how to make connections with block diagram of an 8-bit microprocessor with 10 bit address lines interfaced to a 1kB RAM system of 256 RAM chips using a full/partial decoded addressing technique.
1
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1answer
57 views

How to check female header connection?

I am very inexperienced at electronics, but I have recently tried to connect a wireless chip to my microcontroller. I soldered some header pins to my board to allow me to remove the chip when needed ...
1
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1answer
51 views

band pass filter on solar cell to detect laser

my target is detecting a laser generated with 1k frequency using a solar cell, i'm using this idea which is using a band pass filter on the solar cell to block the dc sun light and let me detect the ...
0
votes
1answer
57 views

How i can store 64 byte data into flash faster as 1 ms?

I have one problem with store data into flash on my uC LPC1759. I need to save 64 byte data into flash, but when i use IAP-Interface, it takes more than 1 second. Is there a way to make it faster than ...
0
votes
2answers
84 views

What is the maximum bitrate supported in the Can Bus?

i began reading about Can Bus for my final year project i have to send a file to be flashed into the microcontroller using the CAN BUS . I have found that the maximum bitRate that can be achieved is ...
-6
votes
0answers
48 views

FADEC jet engine gas turbine control unit MCU microcontroller [closed]

I started working on control unit for small jet engine. Many modern microcontroller can by used for this application. But I am interested which microcontroller is used for control real aircraft jet ...
0
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2answers
84 views

Do I really need an H-Bridge controller in this application?

I'm looking to integrate a latching solenoid in my next project. I found a 5V latching type here: LHLA0531111H The manufacturer recommends I use an H-bridge to control switching of the solenoid. ...
3
votes
2answers
156 views

Is this STM32F based circuit ok?

So this is my first time moving away from Arduino based projects and I am now planning a project using the STM32F105RBT6. It has a USB port and I plan to have a simple PC program that displays the ...
1
vote
1answer
69 views

Using Dither to achieve finer PWM resolution

In practical industrial applications (regardless of any particular industry), is there any use for a dither module that goes along with a PWM module considering HRPWM's are available. With my limited ...
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0answers
42 views

How to hookup Ambiq Micro Apollo MCU to Analog SSM2211 for audio playback

I am new to the electronics area. I have been searching on this topic for a while now but I still don't have a clue. Thank you for helping in advance. I understand the Ambiq Micro Apollo MCU ...
0
votes
1answer
67 views

High side switch won't turn off

I'm using the ISP762T. I have a 12V power source and all I want to do is switch it on and off (via microcontroller) depending if I want to power my 12V circuit or not. That datasheet says present a ...
3
votes
1answer
84 views

What is a good way of estimating how long a battery will last for powering up a microcontroller

I know this is going to be a broad question, but I'm looking for a broad answer that can get me a ballpark figure. When building a board with microcontroller, what's a good way to estimate how long a ...
0
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2answers
45 views

Servo - PWM Resolution

I'm trying to create a servo drive function on an ATMEL microcontroller without using the built in PWM functions. Basically just with the ISR timer. My question is... what is the general resolution ...
-2
votes
2answers
54 views

Adaptation of the ICD2

I'm trying to adapt the ICD2 so that it can be used with a microcontroller family (dsPIC33F) that has a 3.3V supply. Projects using the ICD2 must be 5V. How can I do this?
0
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1answer
33 views

Battery voltage isolated monitoring on Microcontroller

Is it safe to directly measure high capacity battery (100 Ah to 300 Ah) voltage with Microcontroller's Analog to Digital Converter (ADC)? Would it be enough to use just a simple voltage divider to do ...
1
vote
3answers
85 views

How do microcontrollers (MSP430G2452/G2553 specifically) behave when the battery runs low?

In the event I decide not to monitor the battery (see below), I'd like to know how microcontrollers behave when battery life is low - specifically the MSP430G2553/2452. Do they reach a point and stop, ...
2
votes
2answers
48 views

Making a NCS36000 PIR controller output a distinct and clearly identifiable signal that could be used as a virtual button push [closed]

I need to trigger a peripheral on my existing PCB design. I would use a pushbutton, but can't remake the boards. I need to hack/modify a way in. My MCU is An ATMEL XMEGA and I have a PIR detector ...
0
votes
3answers
104 views

MCU strange failure

I am using a STM32F4 chip to build a control device product. We received a report from our customer that our device does not work properly after having been work half an hour. Even reset does not ...