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
36 views
MAX485 Burns after working for some time. RS485
I am using the circuit provided in the datasheet of MAX485. But is getting burnt after some time of working. I don't understand what is the problem. I also tried getting new ICs from a trusted ...
-7
votes
0answers
37 views
-3
votes
3answers
47 views
What is the function of AVDD,AVSS and Vref of ADC in Microcontoller?
I want to know the function of AVDD,AVSS and Vref in Analog to Digital converter in a Microcontroller. If AVDD and AVSS represents the range of input voltage ,what ...
-5
votes
0answers
18 views
On off switch on bottom of logic tech wireless mouse [on hold]
I want to see how I can open or turn on the switch and leave it on because switch is toast.
0
votes
2answers
35 views
Power two connected circuits with one battery
I want to use a 9v 1200mAh battery to simultaneously provide current to a 9-12v motor and microcontroller. The microcontroller would ideally switch the motor circuit, which would derive power from the ...
1
vote
1answer
41 views
Which ARM debugger hardware should I used to debug?
I read here about ARM programming, pag 252, about ARM debug hardware, but I don't understand which hardware physically tools is used in practice.
ARMv8 processors provide hardware features that ...
0
votes
0answers
30 views
What are the theoretical procedure and requirements for FOTA? [on hold]
What are the theoretical procedure to perform FOTA, Firmware Over the Air update?
What all should be the feature in the microcontroller to support FOTA ?
-5
votes
0answers
48 views
How to decode RC5 signal? [on hold]
I'm workin in a IR recever project with Microcontroller 16f877A, the signal from an RC5 IR Remote controle and I need an algorithm to decode the rc5 signal.
I'm codding the MC Using Assembly not ...
0
votes
1answer
60 views
Negative Feedback Op-Amp as input to ADC
I have a target board(With Nuc240,Cortex M0) with ADC connected through an OP-Amp(NE5532APSR) as shown in the image.
...
0
votes
0answers
57 views
Redundancy for a system [duplicate]
I'm designing an redundancy algorithm. Two STM32F407 cortex m-4 microcontroller is used as master as well as Backup. I'm facing problems in selecting the output from master and backup to peripherals. ...
0
votes
0answers
58 views
The hexacode uploading on microcontroller [on hold]
My question is how the hexacode after burning on chip make the buses energized according to the assigned algorithm. I know it is transistor transistor level, but I am still cannot imagine how this ...
1
vote
4answers
68 views
Ultra low power heat switch
I have a battery operated device which needs to be temperature enabled. Once the temperature goes above 60C, the device should start operation. Ideally it'll be like a fuse, and will continue even ...
1
vote
2answers
81 views
RTC wake up circuit problems
I am building a project that uses a MCU to read data from various sensors every hour, and I'm aiming to use a RTC to wake it up.
The circuit uses two transistors that are controlled with the alarm ...
3
votes
3answers
84 views
Understanding difference between Interrupt Address and interrupt vector address
In my undergrads, I was taught 8051 and in interrupts my professor had said that on interrupt SP points to the address that is hardcoded and Program goes to excute those instructions. But in between ...
1
vote
3answers
226 views
How can I debug microcontoller code during run time?
I'm using Nuc240 Microcontoller which has its UART0 configured for 'printf',I use a UART to USB controller to view the output on screen. This works during run time also, so that I could monitor things ...
0
votes
0answers
42 views
Reliability of speed from GPS module to initiate a sleep mode
I'm making a GPS Tracker by using Gtop-016 module.
I want to put the Microcontroller(Nuc220) to sleep mode when there is no motion detected for few hours. Is it reliable to use the speed reading from ...
0
votes
0answers
13 views
Gate Buffer IOFF, and Theory Validation
A few questions:
1) So I'm looking at Gate Buffers for my MCU's HIB pin, for controlling some load switch ICs. I noticed many of the datasheets list something like
This device is fully specified ...
0
votes
2answers
75 views
How to make use of 'Power ON Reset' while there is noise in Power?
I'm using Nuc240LE3AE(Cortex M0) to run a code that is developed.
I want to run the code on startup for which (POR)Power On Reset facility is used.
Normally this is Enabled in the Micro-controller and ...
0
votes
0answers
74 views
Control Circuit which Supply both AC and DC to AC or DC load
Updated Question:
I need a Circuit which can switch both AC (230V) and DC (24V) to the Contactor of Generator (if it's AC or DC contactor), also it's an Inductive load. The contactor coil needs a ...
-2
votes
0answers
66 views
Can multiplexer be used between two common pin header microcontroller? [on hold]
We are stacking two microcontrollers ( one as a master and another as backup to the master if the master fails). Stacking is done one on another using common pin header, So each pin of master ...
0
votes
1answer
49 views
Do both Vss pins on a 6502 need to be connected?
Are the 2 Vss pins on a 6502 connected internally? Or do they drive separate parts of the chip? I'm designing a circuit on perfboard and I only have space to connect one of them to GND, will that ...
1
vote
0answers
26 views
Writing Scheduler/RTOS in XC8
I have an interest in writing a scheduler/RTOS project in XC8 using an enhanced MCU with access to the hardware stack.
I am trying to figure out how to control the creation of the software stacks so ...
-3
votes
1answer
44 views
Flashing code from IDE to microcontroller [duplicate]
How does code download from PC to flash memory controller work? I mean what documents do IDE designers refer while designing this kind of software.
Are there any standard documents available for ST ...
0
votes
0answers
17 views
Barebone ATSAMD21G - start with IO on breadboard
In my quest to learn about microcontrollers, I did reach a result that for me is pretty exciting: I am able to upload code to a barebone ATSAMD21G, connected to a breadboard, using my ICE programmer. ...
1
vote
1answer
60 views
Writing hex to several microcontrollers at the same time via ICSP
Is it possible to write a hex code to several microcontrollers via one ICSP and one program on PC at the same time ?
More specifically : I'm looking to program 10 PICs at the same time from the same ...
0
votes
3answers
68 views
How do I connect a PIC microcontroller to a computer?
I am still a beginner, middle school student, and I recently started taking interest in Arduino, Raspberry Pie, etc. Now I want to play around with the PIC microcontroller, but I can't find a way to ...
1
vote
1answer
49 views
Timers in TM4C123G not working
I wanted to use timers in TM4C123GH6PM (in TIVA C series TM4C123G Launchpad evaluation kit). So I decided to use GPTM TimerA0 in periodic timer mode. I defined the address of the registers of GPTM and ...
1
vote
1answer
51 views
Circuit for driving 24V VF-Display with Arduino MC. Does this work?
I am trying to operate an IVL2-7/5 vacuum-fluoresecence-display with an Arduino Uno.
It is a multiplexed 4 digit clock display that requires a cathode voltage of 2.4V and an anode and grid voltage of ...
0
votes
0answers
46 views
How to are interrupts used with PIC timers? - PIC12F683
I am just learning how to program PIC micro-controllers and timers seem to have me stumped. I am using a simple 8pin PIC12F683 Datasheet. I am trying to toggle an led on GPIO pin 4 using an interrupt ...
1
vote
1answer
36 views
PICKIT2 loses bandgap values
I am new to PIC microcontroller programming. I tried to program PIC12F629. I simulate my program in Proteus, and it works fine. But when I tried to program it using PICKIT2, the band gap calibration ...
0
votes
1answer
87 views
Is JTAG the standard way to program ARM processors?
Some electrical engineer once told me, that each ARM M3 processor can be flashed the same way, no matter which manufacturer it came from.
I suppose he meant using JTAG, or is there another way?
Btw,...
0
votes
0answers
13 views
Datasheet for WD-Y1212VE-6CLWc
I want to make use of an old samsung phone which I had by using it's LCD display for an MCU project.
The display has the inscription ** WD-Y1212VE-6CLWc ** at the back.
I have searched for the ...
1
vote
1answer
60 views
How to interface to a HyperRAM with a microcontroller
A couple of manufacturers have had this low pin count HyperBus interface now for a few years. It seems like finally there might be a way to get a few megabytes of RAM into a microcontroller project.
...
0
votes
1answer
70 views
Sine wave pwm signal measurement with digital oscilloscope
I am beginner in electronics and I would like to measure 12 kHz sine wave pwm
signal on the output pin of my microcontroller. My problem is that I am not
able to setup the digital oscilloscope RIGOL ...
0
votes
2answers
64 views
Can i use a slower clock rate for a CPU or a Microcontroller than the one it is supposed to use?
Say i have a CPU or a Microcontroller with a clock rate of 1 GHz, can i use a 1 kHz instead?
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votes
0answers
35 views
Difference between Clock and Operating Frequency
I am very new to embedded world. I am trying to design a transreciever system based on RF MCU.
I am looking at ATMEGA64RZAV-10PU from Atmel.
The datasheet says the clock frequency as 10MHz but ...
-3
votes
0answers
50 views
Arduino Detect Servo Stall
I try to detect when my servo stalls with a voltage divider but as soon as I connect two resistors (both 220Ohm for test purposes) it doesn't move at all. I don't know why...it's really annoying.
I ...
0
votes
2answers
57 views
CAN transmission and message IDs
I have two CAN nodes. For example, one node will transmit temperature and the other node will receive the temperature data.
We know that CAN protocol uses message identifiers (IDs). So what happens ...
1
vote
2answers
63 views
Getting code onto a microcontroller
I have broken open a few circuits of some electronics (DVD player, handheld game device) and I can see the microcontrollers in them. However, I have no idea how they get their programs onto them! ...
1
vote
3answers
161 views
CAN not transmitting temperature data
I have been working on a CAN bus project. It is a project from the book Advanced micro controller projects by Dogan. It is a temperature sensor CAN bus project. As you know, the project can't be ...
0
votes
3answers
83 views
Resistors in serial communcation
In my still relatively short journey into the world of electronics, I have stumbled on multiple schematics that use resistors in serial communication and suspect that they are there for some kind of ...
1
vote
1answer
43 views
Preferred way of interfacing relay coil with active low output from MCU
My prototype would use active low output from 8-10 ESP8266-12E GPIO pins to control AC appliances. I have several options to interface the relay (or SCR phase control circuit) with the MCU. But I can'...
0
votes
1answer
114 views
Simulating a simple RC circuit using an arduino and the circuit's equivalent discrete-time transfer function
Suppose we have an RC circuit with the continuous transfer function: \$G(s)=\frac{1}{RCs+1}\$ with R=1.6k, and C=2uF. Using the bilinear transformation(or better known as Tustin method) \$ s=\frac{2}{...
0
votes
2answers
37 views
What does “open drain when programmed for the wait function” mean (in micro controller spec language)?
So I am reading the Zilog Product specification for the Z8440/1/2/4, Z84C40/1/2/3/4 serial input/output controller (here it is
http://www.zilog.com/docs/z80/ps0183.pdf).
And there is one sentence ...
1
vote
1answer
41 views
Safest way to trigger camera shutter using arduino
I'm working on a prototype where I'm controlling my DSLR using BLE module.
I found many tutorials to trigger shutter release using Arduino on the internet.
So far, I have found optocoupler to be ...
0
votes
0answers
29 views
Is there a way to program a variable that updates at flash time with avrdude?
I'm using an application where the time and date is needed, and I was wondering if there was some way to include this automatically with AVRDude.
What I want is to have a variable in my program that,...
0
votes
2answers
37 views
Stepper to sequence back and forth
I am new to Stepper Motors, I am a mechanical Eng. Have a slight disadvantage with the electronic end. I need a stepper to run one direction, then reverse in sequence. Will a Stepper programmer do ...
-5
votes
3answers
80 views
Alternatives to Arduino [closed]
The Arduino Microcontroller platform is great for hobbyists. But I was wondering if there is an alternative to it? I need to calculate the position and speed of the robot in a defined space using the ...
0
votes
1answer
28 views
Can I use Opto Isolator or Opto Coupler instead of Relay to operate AC Source?
I am designing light control board using micro controller.As I want to make my circuit board smaller, So I am thinking to use Optoisolator or Optocoupler instead of using Relays. So please let me know,...
-4
votes
1answer
39 views
Arduino LED project, initially lighting the led
I'm starting my first arduino project, and basically am having some trouble with the initial set up. I'm trying to light one led pixel. Here is the link to the led pixels I'm using https://www.amazon....
