How do i construct a Delay Circuit?

Question

I need a circuit that will give me atleast 0.5ms of delay for another electronic circuit tht gives an output of 5V dc max.... (the circuit gives a DC o/p). Plz suggest a few circuit diagrams/ links to construct the delay circuit.....

Answer 1

There is a very common IC called the 555 timer, that is perfect for your application.

Here is a datasheet for the part. It contains application notes that tell you how to build your 500 micro-second delay. Look in the Application Information section, and use the Monostable configuration.

http://cache.national.com/ds/LM/LM555.pdf

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Answer 2

area of the subject is understanding the load. you won't be in a position to easily say discharge at 12V devoid of a few thing detecting the voltage and triggering the progression. i'm questioning a micro-controller examining the voltage around the cap it relatively is in parallel with a resistor that controls the cost value. as quickly as the MCU's A to D converter reaches a definite fee, set off experience. of course MCU's could additionally purely diploma the time the button is held and you do no longer even want a cap then. yet another risk may be to apply a zener diode and voltage divider however the subject with using the ability off the cap to ability your experience is that we'd desire to be conscious of the way plenty modern-day you desire. i won't be in a position to offer you a cap length devoid of it.