Square impulse generator

[dawid5255252]

Hello, I want to design a generator to generate wave like at picture below.



I mean, that the device should be switched ON every hour for the duration of 2 seconds. Someone can give me an advice? Is there any chance to do that timer without using microcontroller, because I am beginner and I can't program it yet?

 

[goldsmith]

Hello, I want to design a generator to generate wave like at picture below.

przebieg.gif

I mean, that the device should be switched ON every hour for the duration of 2 seconds. Someone can give me an advice? Is there any chance to do that timer without using microcontroller, because I am beginner and I can't program it yet?

Hi dawid
That's easy !
Are you familiar with 555 timers ? or perhaps relaxation oscillators with op amps ? they can easily suit your purpose .

Best Wishes
Goldsmith

 

[E-design]

There are various ways of doing it.
Look at the data sheet for CD4060B, CD4013B and CD4059B.

It think it could work like this:
Use a watch crystal (32,768 Hz) with the 4060 and get a divided output of 2 Hz (0.5 sec period)
Divide this again by 4 with the two sections of the 4013 to get 0.5 Hz (2 sec period)
Strap the 4059B to divide by 1800 (1 hour period = 3600 sec).
After the 1 hour of 2 sec input clocks the 4059B's output will go high for one clock period (2 sec) and start the next hour timing cycle.

You should find all the details in the relevant data sheets.

 

[PA4TIM]

http://www.pa4tim.nl/wp-content/uploads/2010/11/ESR_mk4.jpg This is an ESR meter but the LM339 and 4013 part on the right of the schematic make a 10-100 kHz squarewave with a perfect 50% (or very near to 50%) duty cycle.
http://www.csgnetwork.com/ne555timer2calc.html with a 555 you can make it too.
http://www.pa4tim.nl/?p=2677 This is also a squarewave, but a realy fast one. A risetime of 500 ps and 16-160 MHz with almost no parts
http://www.ti.com/product/lmk03806 digital version
And you can use things like a 4060 and X-tal
http://www.milkcrate.com.au/_other/sea-moss/01_oscillator.gif probably the most simple oscillator you can make. Only 3 components.

So, choise enough, But all depents on the frequency, dutycycle , rise timer and amplitude you need

Edit: oops, I did not read the frequency/dutycycle. The E-desingway looks to me like a good oned

 

[dawid5255252]

Thank you guys very much!
I will think over best solution and get to work