In electronics, a delay is an amount of time between two events. For example, the time between input and output of a signal in a circuit could be referred to as the processing time, or the delay. Sometimes delay is added deliberately, as in certain audio effects.

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ideas for a fast acting one shot rise w a 100 ms re trigger delay

I'm doing a hack on a drone deployed camera that will trigger a high accuracy GPS tracker. The issue is I'm using the motor voltage from the camera shutter(no external flash available) via opto ...
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950 views

Rocket launcher circuit design

I'm building a model rocket launcher with my son. The circuit is very simple as you can see. We want to add a buzzer and a LED/bulb when it is turned on as a warning to stay clear of the rocket. How ...
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1answer
36 views

How the relationship between input and output is derived in a comparator?

In the slide 6 of the page about propagation delay of a comparator, the time relationship between input and output is as below. However, I am not sure how the function between input and output voltage ...
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3answers
133 views

How to implement precise delay function in Keil c51 (for c8051) that waits exact amount of CPU clocks, the number of clocks ranges from 1 to 255

So as the title says, I need exact delays, not too long, ideally in the range of 0 - 350 CPU clocks, but if anything would work in narrower range the absolute minimum range is 20 - 127 CPU clocks. So ...
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2answers
40 views

Circuit todelay RS-232 TX pin closure after device power up

We have two devices connected via a cable, an ARM based computer on one side and a sensor on the other. This cable carries an RS232 TX, RX, and ground. In addition there is 28V provided from the ...
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1answer
25 views

ATmega32A _delay_ms after IO calls

I am loading the following code into ATmega32A PU 1535 to flash the LED on pin 40, PORTA 0: ...
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4answers
99 views

How important is gate delay when designing a Circuit?

First year EE student here, we've been learning about CMOS Inverters in class and about the of logic gates, but it hasn't really been mentioned how much this effects the design of a Circuit in ...
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53 views

PIC delay using XC8 compiler

I have been playing around with my Microchip PIC18F13K22 for a while now. But one thing I have been wondering about is the fact, that the compiler's __delay functions do not work as intended. I have ...
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53 views

I have this timer circuit. Push and release vs push and hold give me different times

I have a timer circuit which I slightly modified from the one in this link I have an image below of what my circuit looks like. My problem is this: When I push my start button and immediately let ...
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2answers
387 views

Differences in using c user-defined functions on PC and on ARM

I am new to programming in c and to ARM also, so forgive me silly question. I would like to find answer on the net rather than to bother you, but there is not many materials in the web. I am using ...
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1answer
48 views

Switching power supplies with a relay, how to account for delay between connections? [duplicate]

this is my first post on this site (but I will have more, have no doubt), so if I have posted in the wrong section or something please forgive me. Anyway, I am currently doing a battery powered pc ...
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43 views

Relay turn off delay

I need help with my project. I want to design a circuit for my car. It goes like this: Blinker on car is made with 1-filament bulb. I want to use this bulb as indicator and as DRL (made by PWM - ...
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58 views

555 autostart counting

In a monostable configuration of the 555: http://circuitdigest.com/electronic-circuits/555-timer-monostable-circuit-diagram I have connected pin2 to the ground all the time. My goal is that once the ...
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3answers
65 views

Delayed latching switch

How would I make a switch that is controlled electronically, and has a ten second delay? I have a circuit that will output either 3.3V or 0V. I would like to make a circuit that detects 3.3V, waits ...
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2answers
182 views

Static Hazard in Specific Value or Any changes?

I have one solved problem, My teacher solved it as follows: and says with B=C=D=1 for change value of 'A' from one to zero we have Static-Hazard '1'. but I think we should say with ...
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2answers
60 views

latching with a timed relay

I am an ultra newbie, so please excuse my design/drawing here and I am sure my terms are not correct, but I want to learn. Here is what I am trying to do and a diagram. I think I got it right, but ...
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2answers
78 views

Synthesizeable D Flip flop for FPGA

Having played around with Verilog for some time now, I decided to graduate to implementing designs on Alltera CycloneIV FPGA using the Quartus suite. Starting with a simple D flip flop, I face the ...
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1answer
54 views

MOSFET Drivers to decrease turn on/off times

Using MOSFET drivers, can one decrease the turn on/turn off time of MOSFETs than indicated in their datasheet. If so, by how much? Is it in the scale of orders or just barely?
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2answers
137 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
148 views

pulse width modulation

I need help on number one of this practice assignment. I barely learned about this so it is kind of hard me to understand it right now. So any advice or help is appreciated. I want to determine the ...
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1answer
42 views

Frequency Shift a Bode Magnitude Plot

for the 2nd order response of $$1-\dfrac{2\zeta\omega s + \omega^{2}}{s^{2}+2\zeta\omega s + \omega^{2}}$$ I get the plot shown in blue. How do I go about getting the plots shown in red and green ...
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1answer
41 views

how to get delays of a circuit under process corner in hspice?

my circuit is composed of a chain of inverter (delay line), and i want to see how the delay of this chain of inverter behave in process corner? i want to know if the delay line will be still ...
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187 views

Arduino analogread: neighbor pin noise on ADC even with big delay

I'm reading two analog input values (light sensors, with pull-down resistors) on an Arduino MEGA 2560. One pin is supposed to report the value of 0, while another pin is supposed to report a value of ...
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2answers
90 views

How does a time delay contact remain open

If input voltage energizes a repeat cycle time delay relay coil, and the contact closes thus energizing output to the load for t1, how is the contact is able to open after t1, if it's still energized ...
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1answer
41 views

Improve a simple “magnetic alarm” with a timer, to extend the ringing time

I've bought this simple "alarm" for a door: Which is internally provided with a reed switch; inspecting the internal circuit using a multimeter, I figured out that when the magnet is placed near to ...
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1answer
53 views

Understanding critical paths

So I'm having trouble understanding critical paths. I have the following example question: Draw the critical path that shows how fast the counter can count: Delays are specified as follows: Delay ...
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1answer
58 views

propagation delay (low -> high / high-> low)

i build a 2x2 bit multiplier circuit where i take a number (a1a0) and multiply it by (b1b0) . and im asked to calculate the time propagation from high to low , and from low to high for every input ...
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1answer
62 views

How to delay a relay closing?

I have a situation where I'd like to delay the closing of an off the shelf relay by ~5 seconds. Assuming it is a 5V coil, and switching 12 V, I'd like the following: t 0:00: 5v applied to input, ...
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2answers
212 views

How can I set a delay in Verilog using a clock?

I'm trying to write an always block that will open a valve and then keep it open for a few seconds and then close it if needed. The valve opens when the input is 1 and it closes when it's zero. How ...
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4answers
441 views

How does a logic gate behave with an input changing faster than its propagation delay?

I am attempting to create a simple logic circuit simulator. I am having a hard time figuring out how does a logic gate behave with an input changing faster than its propagation delay. When attempting ...
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1answer
96 views

FRDM-KL25z assembly delay loop causes reset

I'm currently working on a project using the FRDM-KL25Z development board and programming using Keil MDK-lite (5.14a). What we're supposed to do is create a simple traffic light using three ...
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1answer
80 views

Delay/Disable Output Pin On Power On Using Electronics

I have a module that outputs 3V, has a 'Common' terminal (GND), and a switch terminal. The latter two can accept a toggle input OR a pulse input, and internally it switches on a light. I have a touch ...
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97 views

Delay/smooth sensors & buttons (not software side)

Is it possible to create long rising/falling delays/heavy smoothings only using capacitors and basic electronic elements ? (alternatively also IC's, but no 555) This is what i know: Capacitior's ...
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53 views

How do I make a 250 second delay on a PIC16F84A? [closed]

How to write a 250s delay using assembly for my PIC16F84A?
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98 views

compute delay, area and power consumption in xilinx step by step

I've wrote a VHDL Code for a mux16*1 with 15 mux2*1 in ISE Xilinx and spartan3. now, i want to compute delay, area and power of this code. I wrote this code without any clocks so I cant adding timing ...
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1answer
196 views

AVR asm wait loop explain

Can someone please explain me this code (it is from wait loop calculator), I cannot clearly understand calculation. ; Delay 1 600 000 cycles ; 100ms at 16 MHz ...
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3answers
59 views

How to calculate overall propagation time for circuitry

Below is circuitry including a 2-input NOR gate, a 2 input OR gate with 2 inputs inverted, and an finally going through an AND gate. Through experimentation I measured the propogation delay of each ...
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1answer
39 views

Timed on/off switch problem

I'm doing a small project for my school and the main point of my problem is that I need a simple circuit, that could activate for a fixed time when the mains power goes on. For example: I have a TV, ...
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3answers
170 views

PIC MCU: Software or hardware delay?

Experimenting with blinking LEDs, I learned about creating delays with either a software loop or a timeout from a timer. I know that for a simple blinking LED program, where the processes aren't that ...
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1answer
103 views

AVR: Facing problem with Timers

I need a 13 Microseconds delay for transmitting IR at a 38Khz carrier wave. My chip (ATTiny84) is running at 8Mhz. I cannot figure out what's the problem in my code: ...
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1answer
175 views

Capacitor Delay Circuit

I`m trying to create a basic delay circuit using a capacitor. I am using a momentary switch in series with a 220 Ohm resistor, a H332 100uf 25V rated capacitor and an LED, all connected to a PP3 8.4V ...
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1answer
59 views

What is the effect of this delayed statement in the following process?

Hi guys in the following process how the delayed assignment should be interpreted? ...
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4answers
203 views

Error generating 1 sec delay using timers in PIC32

I have a PIC32MX795F512l and because XC32 doesnt provide an inbuilt delay function, I am using ...
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1answer
2k views

How to wire this delay relay switch

Hello I recently bought this item at ebay and I am not sure how I should wire this. I will power it with a 9 volt battery and the relay will power a pump, this is how they at ebay show how I should ...
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2answers
56 views

An COTS solution for delaying a 120kHz analog signal?

Looking for some cheap method of adding a 350uS delay to a pulsed sine wave. It would be useful to emulate a pitch-catch ultrasonic distance measurement setup
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1answer
128 views

osdelay function stm32

I still work with stm32f407 and I have a question. When I write osDelay function for 2 seconds , it works 5 seconds. How can I fix this extra delay ? This osDelay function in cmsis_os.h library.
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1answer
56 views

Calling a routine every x miliseconds

I'm working on a motion controller using the mbed platform. The idea is to calculate the theoretical position in the move every x milliseconds and then compare it to the actual position from the ...
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1answer
94 views

Series inductor as discontinuity in transmission line

Dual to this question is the following circuit: simulate this circuit – Schematic created using CircuitLab An infinite transmission line (with characteristic impedance \$ Z_0 \$) ends ...
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1answer
132 views

Shunt capacitor as discontinuity in transmission line

As in the following circuit simulate this circuit – Schematic created using CircuitLab suppose that an infinite transmission line (with characteristic impedance \$ Z_0 \$) ends upon a ...
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3answers
534 views

12 hours delay with ATmega16A

I am trying to turn on a LED for 5sec every 12 hours. I tried: ...