Questions tagged [timer]
Circuit to generate a signal at a specific time after a trigger event. The timing can be defined by an RC time constant, or by clock pulses from an oscillator.
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Six monthly service timer with indicator
I have been requested to look at a project. The first half of the project is complete, but I am struggling with the second half of the requested specification.
For the second half of the project, I ...
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How is it possible to simulate a astable NE555 that drives four other one-shot NE555 timer chips, with the main astable at 2 hours, others 30 minutes?
Introduction
One Astable NE555 together with four additional one-shot NE555 are used from a 6-volt battery array (4 batteries, each 1.5 volt) to generate low voltage signals that are then used with ...
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Detecting missing pulses / minimum off-time in a fast pulse train
I’m working with a 3.3 V digital signal that behaves a bit like a timing puzzle.
Under normal operation, it produces a pulse train where both the high time and low time vary, typically anywhere ...
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Advice on setting up sensor switch
Hi I would like to fit a (motion sensor/IR sensor) sensor switch to a machine in my catering van. The machine is a 12v machine.
I would like to start the machine using the sensor switch and would like ...
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What are the possible ways of producing custom sound without use of microcontroller?
I'm creating a project where I want to produce custom sound like music or of animals.
AFAIK it require at-least mainly the below components (ignoring electric components like resistors):
Battery
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Why we select Slave mode and Trigger Source for STM32 Timers to capture mode?
To measure a input signal width, generally documents say to choose Slave mode such as Reset, Gated or Trigger mode and then select a trigger source like TI1FP1. But I can easily measure pulse width ...
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Project Laser LED with a NE555D timer - problem with the current
I am doing a project where I have three Laser LEDs. They need to send three different signal lengths. I am doing this with three NE555D Timer, one for each signal.
The problem is: I am not coming to ...
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RC Circuit for Timing Module
I am building a timing circuit designed to detect pulse signals and shut off a load (e.g. an LED) if the pulses are sustained, but allow the load to remain ON if the input is a steady DC 12V.
Project ...
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Generate a fixed number of pulses on the STM32F4 PWM
I am trying to control a servo motor (link). It is a brushless DC motor with an interface similar to a stepper motor.
The motor rotates for a defined distance based on the number of pulses it ...
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Need to run a 75 mm × 30 mm 12 V 0.24 A blower for 10 secs
I am trying to run this small blower off a computer or 3D printer. It’s a 75 mm x 30 mm 12 V 0.24 A. I need to have it turn on and run for anywhere from 6-8 second by push of a button and then shut ...
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STM32 timer generates first pulse way longer in PWM mode
In my application, I need to generate short ping pulse (~200-300 ns) and then square wave with defined frequency and duty cycle (~5-10 us period). I have timer configured like this:
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Reset 12 V power supply every hour [closed]
How would I disconnect and reconnect 12 Vin every 2 hours to my circuit board?
I was thinking about using a 555 timer to reset the power but I'm not sure how to do it.
Null♦
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What module do I need, to make a light stay on for 2 minutes and then turn off? [closed]
I have a quick question. I am trying to create a box where the button is clicked; the light comes on for 2 minutes. I am using a 12-volt battery to power this. I want to know what module I need for ...
Null♦
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Correcting flaws in this 555 module for a timer
I want to simulate a push button with a little circuit. I'm using an IC 555 as a timer. The button is in another circuit (different device), pin A has 2.4 V and pin B is GND, it does activate if I ...
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How to build a blinking 12V indicator LED light
I attempt to build a blinking circuit using 12V truck light ( like this one: http://www.princessauto.com/pal/en/Tail-Lights/4-in-LED-Stop-Turn-Tail-Light/8126047.p). I have try to build a single LED ...
Null♦
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