The delay tag has no wiki summary.
3
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3answers
70 views
Dealing with digital circuits and their associated switching speed?
When designing a digital one-minute counting circuit I came across a difficult problem.
Basically, I designed the circuit to drive the (normally HIGH) clock of the 10s slot low if the 1s slot's ...
0
votes
1answer
27 views
How to measure the delay of one single inverter in ASIC?
In practice, is it feasible for a chip manufacture to reliably and accurately measure the delay of one single inverter in ASIC? If it is, how can one go about doing it?
0
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1answer
64 views
Would shooting laser or UV light at an inverter make it permanently slower?
I'm studying the topic of cloning electronic circuits for my research. And I have a scenario as the following:
Chip A has two ring oscillators (RO1a and RO2a). And RO1a is faster than RO2a.
Chip B ...
1
vote
2answers
126 views
STM32F4 (Discovery board) universal delay (milisecs) function
On the net, I have found following function for delay in miliseconds for STM32F4 (Discovery board MCU):
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1
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2answers
80 views
How to find Gate Delay
I need to find the delay of a full adder. I searched for it but I couldnt find absolute information.
Sample delays : XOR - 8ns / AND - 2ns / OR - 2ns
What is the delay of this circuit?
My Solution
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-1
votes
1answer
61 views
MOSFET Delay Provider [closed]
I have this circuit, where i wish to turn lower one to ON after a delay, so that at one time only one of them is ON.
The input wave is a PWM Square Wave. Can anyone suggest how i can do so?
1
vote
4answers
277 views
Delay function in ARM programming
I have just started programming on ARM, I had some experience on AVR but not that much. The question is probably too trivial but the material about ARM is too little on the net... sorry anyways.
I ...
0
votes
0answers
56 views
Effects of Non-Linear Phase Shift/Delay in ADC
I am designing a monochrome image broadcast system that involves:
Camera -> DAC -> Frequency Shift Keying (FSK Modulation)-> Broadcast over FM ----- Receiving & Demodulation -> ADC -> PC Image ...
0
votes
1answer
175 views
How would I delay a power on and power off
I need to delay power to the motors for my CNC driver project (using Toshiba TB6560 ICs, which require the motor power to be switched on after logic power and switched off before logic power).
I ...
1
vote
3answers
88 views
What's The fundamental difference between interrupts and delay in embedded programming?
I'm new in embedded programming in C, just getting to understand coding.
Is there a fundamental difference between an interrupt function and a delay function?
I would greatly appreciate answers with ...
0
votes
2answers
90 views
How does using Flip Flops between transmission links increase the maximum clock speed?
I am learning about things such as propagation delay and Transmission delays. About how they limit the maximum Clock speed in a given system (where all the chips use the same clock line).
I can't ...
1
vote
2answers
75 views
Assignments with after and signals
I am trying to understand how assignments with 'after foo' work, so I read about the delay model and simulated the following code:
...
5
votes
4answers
1k views
Transistor Delay
I'm attempting to make an alarm for a freezer so that if the door gets left open, after 1 minute or so, an alarm will sound.
I've got something similar to the schematic below. When the switch is ...
0
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1answer
153 views
Maximum and Minimum delay of combinational logic circuits
I am preparing for my exam and I am stuck with this past year question:
In the circuit shown below, the blocks A, B, C, and S are combination logic circuits. FF1 to FF3 are D flip-flops with same ...
1
vote
1answer
64 views
Power delay profile and broadband bus
I came across the following solved question, but I have trouble understanding part of the solution. If anyone could shed some light into this I would be really grateful since this problem has been ...
0
votes
1answer
78 views
Do I have to equate clock and Data Bus propagation delay for Transmission Lines?
My question is about SDRAM timings for clock and DataBUS. Som designer advice that clock pin has to be the shortest one. Data Bus may be longer than these because of the some problems. But clock trace ...
2
votes
3answers
174 views
how to create a square wave with large duration and high duty cycle
For a "plant waterer circuit" I would like to add a safety feature that prevents watering for over ~3 minutes, and delays the next watering from occurring for ~12 hours.
Currently the circuit is ...
2
votes
1answer
49 views
Large range delay at medium frequency for MC
I have a program that varies the step time and duty cycle for a 6 step commutation sequence. It takes an 8-bit ADC result and stores it as the TMR0 value, when TMR0 overflows, the ISR selects the ...
-3
votes
3answers
217 views
Drawing circuit activity through a D flip-flop while ignoring propagation delay
Can someone explain how would would draw the Y and Z activity in the following problem (if we ignore propagation delay and assume Y and Z start at 0)? How do the clock and X help in this problem? ...
5
votes
3answers
2k views
0-10 second on-time with a potentiometer
I would like to make a simple circuit, where the a potentiometer controls a 0 - 10 second on-time.
If the potentiometer is set to min, the on time should be 0 seconds. If the potentiometer is maxed ...
1
vote
1answer
272 views
Generate DC pulse after switch turned off?
I've got a power source (say 12V DC) that I'm monitoring with a relay. I want to send a pulse (over 5V DC) to another relay for 60 seconds after the first power source has been turned off.
A ...
3
votes
2answers
439 views
avr attiny84: wrong delay
I'm pretty new to avr programming. I'm facing a strange problem that I can't solve so far.
I've wrote a simple code:
...
2
votes
2answers
116 views
Delay then off for tone signal
I have a simple circuit using a 555 timer as an oscillator to output a 12v tone to an intercom system. I'd like to make a delay circuit that will turn off the output of my circuit after a delay.
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0
votes
2answers
202 views
Encoding delay of Ethernet and the relation to cable frequency rating
I asked a question here called "Speed of electricity (signal propagation?) through copper for communications delay". I wanted to know how long does it take a signal to travel down a length of Cat5e ...
5
votes
1answer
1k views
How to control Arduino frequency?
I'm porting a code from c in the Arduino platform (I'm using an Arduino Leonardo). I wanto to remote control a camera with an IR LED. The info about the remote control want to emulate here. The code, ...
1
vote
1answer
254 views
time delay circuit keeping line high
I'd like to create a simple circuit for keeping a line "high" for a few seconds after being triggered high, without any external power.
To specify it in more detail: given three inputs, 3.3V, GND and ...
4
votes
2answers
267 views
Delay in Combinational Logic Circuits/Stability
What does it mean for an output signal to be stable? Is my understanding correct that when an input to a logic circuit changes, the time delay for the signal to reach the output (the time for the ...
0
votes
1answer
937 views
Speed of electricity (signal propagation?) through copper for communications delay
I would like to be be able to calculate the delay for communications
data within TCP/IP networking through cat5e networking cable.
That is a pretty vague ...
1
vote
0answers
72 views
Calculating delay caused by the voltage translator chip GTL2000/NVT2000
I want to interface a 5V DSP to a 3.3V FPGA so I need to use voltage/Logic translators for the data, address and control buses.
I found this translator: GTL2000 , It's available in a 22-bit package ...
1
vote
1answer
156 views
phase wrapping group delay
I have the measurements of the group delay of a filter and the period of the signal is always smaller than the delay introduced and thus phase (frequency) wrapping is also introduced.
Do you know any ...
2
votes
3answers
1k views
Bipolar stepper motor: What should the sequence timing be?
What I mean is, how long should a coil be energized before it's de-energized. Also how long should the coil stay de-energized before I power it in the reverse direction. Where can I find this timing ...
-5
votes
1answer
432 views
Smallest Delay Possible in a RF Remote Control
I have a very basic knowledge on electronics but that's it. so I don't know this topic well. Altho, I'm able to assembly a circuit , check it and make it work.
I've been searching for info about RF ...
3
votes
1answer
248 views
Power Off Delay circuit
I'm looking for a timer that starts when power is removed.
Here is the use case:
The head light on dirt bike my turns off with the engine.
This good when it's parked.
This is very bad when doing ...
0
votes
1answer
587 views
How to drive the output pin on FPGA with small delay?
I have an FPGA board with two Virtex-2Pro FPGAs on it. I try to send data from FPGA1 to FPGA2 and then send it back from FPGA2 to FPGA1. I use a register (always block in verilog) to drive each of out ...
2
votes
1answer
578 views
MOSFET voltage controlled delay
As part of a project, I need to evaluate a clock distribution system involving transmission lines. As part of the system, we need to design a voltage controlled delay element consisting of a CMOS ...
1
vote
3answers
385 views
How does CPLD propagation delay work?
My question is about CPLDs in general, but take for example this cheap Xilinx one.
I understand that unlike a microcontroller, a CPLD does not have a clock; external edges activate the logic ...
2
votes
2answers
537 views
SPI flash memory doesn't work without huge delays
For my graduation work I am developing a microcontroller system where the MCU (MSP430FR5739) talks to an SPI flash (SST25VF080B to be particular). I've achieved this without using the eUSCI SPI master ...
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2answers
995 views
Does using only NAND/NOR gates increase circuit delay?
I remember learning in school that one can construct any logical circuit from solely NAND or NOR gates.
First of all, I am ...
2
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1answer
2k views
Arduino: Delay of 1ms necessary between Serial.read and Serial.write?
We have a Razor IMU (10736) sensor board connected to a RS-485 Breakout board, talking RS485 to the computer via a USB-RS485 Serial Interface. We use the Arduino IDE to program Razor's on-board ...
1
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1answer
405 views
Calculating Delay
I want create one milisecond time delay. But, I don't know how to do it because I could not use following three variable in an equation, if there is. Can you help me to creating one milisecond time ...
4
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3answers
2k views
Using avr-gcc _delay_ms causes chip to freeze
I have a ATmega328-PU chip which is setup to use the internal oscillator without dividing clock speed by 8. The first thing I did was to use a really simple program I uploaded; a program which turned ...
-1
votes
2answers
2k views
Creating 1 hour delay with 89C51 micro controller
I am writing an Assembly Program function for 89C51 which can create one hour delay. I can't use any other micro controller as only 89c51/52 is available locally. So I am stuck here because even when ...
4
votes
4answers
935 views
Maximum attainable delay with Micro controller
I am designing a microcontroller based delay circuit to implement delays of 2 hours, 1 hour, 45 minutes, and 30 minutes. The circuit will automatically turn on off a relay after this time period has ...
2
votes
3answers
176 views
Calculating Circuit Delay
I am trying to understand why the calculating the last delay is \$max(t,mt)+2t\$. I suppose thats derived from \$max(max(t,mt), t)+t\$? But how do you extract the \$t\$ from \$max(..., t)\$ out.
...
3
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3answers
6k views
How to implement delay functions in Keil ARM MDK
How to implement delay function in Keil ARM MDK that waits given time in microseconds that can be recompiled to any reasonable clock speed defined in Keil project settings ? And all of this without ...
5
votes
1answer
175 views
Is it worth worrying about propagation delay differences when dealing with relatively slow protocols like I2C @ 400kHz?
At the moment I'm working on a system which will use a 400KHz I2C bus. The bus wires (SCL, SDA) are different lengths by a few cm, so the delay between them will be in picosecond to nanosecond range - ...
8
votes
2answers
2k views
Audio delay using discrete components
I would like to make a circuit that causes an audio delay using discrete components.
I know I can do small phase shifts using an opamp, but I am looking for something in the millisecond or second ...
3
votes
4answers
378 views
Delayed power supply startup
I would like to make a circuit that turns on a power supply to a microcontroller after holding down a button for a period of time (say 2 seconds). To make matters slightly more complicated, if ...
