Questions tagged [synchronization]
the coordination of events to operate a system in unison.
97
questions
0
votes
1
answer
51
views
Effects of too-frequent serrations in vertical sync pulse on analog horizontal deflection oscillator
Normal analog TV video signal has a vertical sync pulse with serrations to help keeping the horizontal oscillations in sync. Also, as I understand it, in case of an interlaced video, these serrations ...
1
vote
1
answer
38
views
I2S microphone data synchronization for left and right channel
I have I2S MEMS microphones (transmitters, stereo) in slave mode and a microcontroller in master mode.
When the WS pin iw 0 (low) the data available on the SD pin is for the left channel (microphone ...
- 11
1
vote
1
answer
34
views
How can I synchronize load cell and sensor for sensor calibration?
I have made a glove with some cheap pressure sensors with weight ∝ 1/resistance.
DESIRED OUTPUT
I now want to create a dataset with columns "Actual Weight" and "Glove Sensor Readout&...
- 251
0
votes
1
answer
87
views
Why don't the GPS equations account for receiver clock drift?
My basic understanding of GPS is that a network of at least four synchronized satellites send messages containing their locations and transmit times (\$A_i, B_i, C_i\$ and \$t_i\$) to an ...
- 3
0
votes
0
answers
58
views
Sync stripper circuit for RGsB to RGBHV converter
Currently, I have a RGsB signal source, ISL59885 sync separator and RGBHV monitor. Green is the same on the input and output connector (meaning, sync-on-green, not the perfect clean green signal).
...
- 163
0
votes
1
answer
48
views
Synchronizing a clock enable signal with an input clock
I'm designing a basic PCB for testing equipment in lab. The goal is to take a clock input, a clock enable (from a PC indicating that the measurement is beginning), and then distribute it to a number ...
- 10.4k
1
vote
3
answers
135
views
Time synchronization of circuits in different places
How can i synchronize times of circuits placed quite far(a few hundreds of meters) from each other?
I thought of using PPS signal from GPS receivers, but I'm not sure about this point:
Are these PPS ...
- 87
0
votes
2
answers
104
views
Will a synchronous circuit have a race condition if not all inputs arrive before the clock rising edge?
Suppose that the circuit has several inputs from an external circuit which do not have an effect until the clock next rise edge due to using synchronous flip-flops. If the external circuit sends ...
- 113
1
vote
1
answer
121
views
FPGA SPI slave doesn't work if driving it with the fast FPGA clock instead of with the SPI master clock (oversampling)
I have an slave SPI device implemented within an FPGA (Basys 3). I have had problems to route the SPI clock signal provided by a master to my slave device through one of the board PMOD pins (see this ...
- 913
10
votes
4
answers
2k
views
Does the SPI protocol specify how many clock pulses a master device should send to the slave?
I'm trying to implement an SPI device in Verilog. I'm having a lot of problems for coordinating master and slave, since sometimes (with my current impl.) the SPI master device doesn't send enough ...
- 913
11
votes
3
answers
2k
views
Do crystal oscillators synchronize by themselves when coupled by supply voltage?
I watched an excellent video about The Surprising Secret of Synchronization
There are examples of pendulum clocks or metronomes synchronizing when coupled by a swinging platform. Other examples are ...
- 2,101
1
vote
2
answers
72
views
Synchronization of remote sensors
I have a project that involves multiple (5+) remote sensor units (custom PCB with a MCU, WiFi Radio, and sensor), that record data for a short test (<60 seconds). Each sensor records data ...
- 676
1
vote
2
answers
81
views
Square wave frequency upsample with crystal oscillator
I'm trying to accomplish the following without the use of a microcontroller:
Input: A square wave with a 1 Hz period, duty-cycle of 100 ms (10%), normally low.
Output: A square wave with a 100 Hz ...
- 13
1
vote
0
answers
88
views
Question regarding STM32 timer trigger mode for synchronization
I am using STM32L4R5 and need a specific case of synchronization:
I am using TIM15 to generate a PWM signal with 50% duty cycle. In my application I have to stop PWM from time to time using the pin as ...
- 79
0
votes
1
answer
44
views
Prevent storing output before computation on button press
For a part of a circuit I am trying to design, I need to make sure the output of the circuit is not stored in a memory cell/RS-latch before it is computed, whenever a button is pressed.
As you can ...
- 101
1
vote
0
answers
45
views
How to have a synchronized clock across 3 different components?
I am desiging a TOF measurement application. I am using following components from TI.
TDC7200, TDC1000, CC2538.
I want to have a synchronized clock across these three. MCU requires 32MHz, TDC sensors ...
- 39
0
votes
1
answer
113
views
is it posssible to make a 4-bit up/down asychronous counter using jk flip flops, xnor gates and nothing else?
the image below is supposed to represent the last segment of the circuit, where the 'updown' input would change the direction of the counting: when updown=0 it counts backwards (f,e,d,...1,0,f...) ...
0
votes
2
answers
376
views
Synchronization in digital communication
I am an undergraduate student and studying digital communication systems.
I am not able to find any good resource where I can self-study about synchronization and it's types (time, frequency and phase ...
1
vote
4
answers
265
views
Synchronising self-blinking LEDs (for fun)
I think most here are familiar with Big Clive's super computer, or one of the many variations (and for those who aren't: the links will explain/demonstrate).
This effect 'works' because the timing of ...
- 165
1
vote
1
answer
151
views
How can I sync an LED with a camera shutter? [closed]
For an academic research project I need to visualise a fast movement. To do so, I need to sync a small (< 6 cm on the longest side) LED light source with the shutter of a high-FPS camera. The FPS ...
- 359
0
votes
3
answers
136
views
sync signal on parallel DC/DC-Converters
I am currently designing a circuit to drive a high power laser-module at 12V/40A. I found the idea from Marco Reps https://github.com/marcoreps/laser_driver very inspiring for my design. Since the ...
1
vote
1
answer
127
views
Generator synchronization to grid and angle difference
Following conditions are needed for generation synchronization :
1 Phase Sequence
2 Voltage Magnitude
3 Frequency
4 Phase Angle
I have question about Phase angle assuming that the frequency is the ...
- 199
1
vote
0
answers
44
views
Confusion in sync-async transmission in RF circuit
I am learning about building an RF transmitter circuit. Now one answer in Answer to DIY RF Transmitter Circuit specified " Very first thing you have to decide on data is whether you want ...
- 161
1
vote
2
answers
129
views
Wireless Time Synchronization Project
I am part of a team project involving baseball where we would like to determine whether a runner stepped his foot on the base (first base, for example) before or after a fielder (the first baseman) ...
- 13
1
vote
0
answers
37
views
Have I understood this solution to the sensor synchronization problem correctly?
I read a research paper which proposes an algorithm to synchronize sensors in a way that is independent of the sensors.
Beginning with the simplified version which assumes no drift between the sensor <...
- 231
0
votes
2
answers
110
views
Synchronizing 2 MCU's ADCs over WiFi
I have 2 devices with analog signals. I want to acquire their signal with 2 MCU's (preferably ARM). fully synchronized with the same sampling frequencies, starting and ending simultaneously user ...
1
vote
1
answer
153
views
Create a synchronous network of 400 devices
I have around 400 devices that i want to address in a star topology. Each device controls a set of LED strips (27*12 resolution). The idea is display a video animation in a good frame per second rate (...
0
votes
2
answers
165
views
How does Synchronous Transmission provide synchronized clocks? [duplicate]
I was reading a textbook which says:
in synchronous transmission, the bit stream is combined into longer “frames,” which may contain multiple bytes. Each byte, however, is introduced onto the ...
- 255
2
votes
1
answer
49
views
SyncE over wireless?
Doesn't look like "Synchronous Ethernet" exist over wireless like it does on wired. Is there any technical reason for it not existing?
On wired, Synchronous Ethernet transfers a 125 MHz master clock ...
2
votes
1
answer
2k
views
How to tell whether a line coding scheme has DC component or not
I'm new to EE, trying to understand things as a non technical audience.
My textbook says one of bipolar encoding schemes called alternate mark inversion (AMI) has no DC component and we can think ...
- 209
0
votes
2
answers
361
views
Does NRZ-I have a synchronization problem?
I'm new to EE, just have a question on synchronization.
I was reading a book which says:
NRZ-I has no problem with sequences of 1s, but has problem with sequences of 0s.
It certainly has a ...
- 209
0
votes
5
answers
249
views
why the sender's clock might not in the same pace with the receiver's clock
I'm new to EE, sorry if my question is dumb. I was reading a text book which says:
To correctly interpret the signals received from the sender, the receiver’s bit intervals must correspond exactly to ...
- 209
0
votes
0
answers
96
views
How to synchronize TI high precision ADC and DAC via SPI?
I am working with DAC80504EVM and ADS8920BEVM-PKD from TI. I am trying to design a system which uses TMDSEVM6657EVM processor board to communicate with these converters via SPI.
However, I am trying ...
- 15
1
vote
1
answer
347
views
How to synchronize PIC PWM clocks?
I'm considering a design which has multiple PIC-based controllers producing PWM signals at 31 kHz. Sometimes, under a well-defined "handover" condition, some pair of PWM power feeds will be connected ...
- 316
0
votes
0
answers
66
views
How does lamp lights up in synchronising unit?
I recently learnt about the synchronisation of alternators using Two bright and one dark lamp method. In this arrangement, lamps are connected between two sources. We done the practical using an ...
- 354
6
votes
4
answers
1k
views
Need a method for synchronization of galvanically separated microcontrollers
I would like to get some ideas for my problem. I have a HW which has a main processing unit (Beaglebone, host controller) which is connected to four galvanically seperated STM32 microcontrollers. All ...
- 391
1
vote
0
answers
479
views
stm32 timer synchronization between output compare and timer interrupt
I need to have timer output compare synchronized with timer global interrupt
,they start separately with two lines below
HAL_TIM_OC_Start(&htim3,TIM_CHANNEL_2);
HAL_TIM_Base_Start_IT(&htim3);...
0
votes
1
answer
683
views
Can I connect an inverter supply and AC mains supply in parallel? [closed]
Consider a solar panel is used to charge a battery and the battery supply is fed to an inverter. When the mains AC supply goes off then the backup battery supply kicks in. Suppose I want to reduce my ...
- 128
0
votes
1
answer
705
views
Ethernet PHY clock and sync
I have a general question about reference clocks for ethernet PHYs.
The PHYs I have seen so far require an external clock source like a xtal or other singleended clock (in addition to the clk lines ...
- 3
0
votes
1
answer
70
views
What's best method to synchronize with main AC voltage?
I'm making an active rectifier, to make it work I need precise information about actual phase of main voltage.
What I need:
1) exact moment when the positive section of sine wave starts and ends. ...
- 49
0
votes
1
answer
138
views
Drift auto-corrector for any microcontroller [closed]
I've made multiple microcontroller circuits in the past, but now when I look at everything, drift has become a problem. I know this when I try to connect two micros together serially via wireless ...
0
votes
2
answers
192
views
Compensating clock drift "by hand" - what have I solved?
Edit: I'm not actually looking for a solution, because short of syncing the hardware clocks (which I can't do) there isn't one. What I'm looking for is an explanation of where the magic -8.4ms I seem ...
- 333
1
vote
1
answer
45
views
Generator data for synchronizing
I have two DG sets which are to be synchronized on to the same AC bus and needless to say, they must share load. I have gathered some parametric data which I felt would decide how well these can work ...
- 475
1
vote
0
answers
54
views
Shift composite image right
The circuit is based on AD725 encoder, and the proto board is functioning relatively well. Here're the pics:
NTSC mode:
PAL mode:
Circuit detects PAL or NTSC mode using MCU, and performs automatic ...
- 6,580
-1
votes
2
answers
262
views
How to sync GPS time and pulses of micro-controller
I have two of the devices (a while loop in the code) that need to start at the same time, within 50ms or less of each other. Each is using the same GPS module, and I am using "ARM® Cortex®-M3 Giant ...
4
votes
4
answers
839
views
Is there an efficient way for synchronising audio events real-time with LEDs using an MCU?
I'm working on a project in which LED lights synchronise with audio events. I'm not referring to reactive LED projects that read the ADC from audio amplitude or spectrum, but about having some ...
- 319
0
votes
1
answer
640
views
Video sync generator IC
I have a board which is a PAL CCIR video sync generator card having SAA1043. The IC is accepting external sync signal from pin 15 and generating composite pulse on pin 26 and burst output on pin 1.
...
- 131
0
votes
1
answer
106
views
Clock synchronised to pulse
I'm thinking about 1Mhz clock signal synchronised to external random pulses (eg. rising edge).
Before pulse event clock can be running or stopped.
After every pulse, it should run in same fixed phase ...
- 69
0
votes
0
answers
117
views
High precision timekeeping
Hey I'm looking for suggestions for implementing a very high precision timekeeping device.
I need to record independent signals in multiple devices and then time match them to an accuracy of about ...
- 131
2
votes
3
answers
159
views
Deciding which assembly is more common positive edge detector
I know of two circuits which can act as edge detector:
A clock connected as a voltage source across a RC component where resistance is composed of a diode and a resistor and this in series with ...
- 231