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Delayed Pulse Generator for a train of pulses using a 555 timer circuit

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Laudanum

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Hello. I am trying to construct a device similar to a transcutaneous electrical nerve simulator. I have built an astable 555 timer circuit which produces a square wave pulse every 6 seconds. However, what I would like to have is a circuit which produces a train of 50 Hz pulses, for an on time of less than 1 second, which repeats every 6 seconds with no output between pulses. I was wondering if anyone knows a way I might be able to accomplish this or modify my 555 timer circuit to do this? I thought that I might be able to use two 555 timer circuits, one producing a square wave every 6 seconds and another producing a continuous pulse at 50 Hz and somehow have the one circuit trigger the other, however I have not been successful. Any help would be greatly appreciated. Thanks.
 

Yes, you can use two 555s connecting the output of the first to the reset of the second.
The only drawback is that the last pulse in a burst may be shorter than expected (the 6s waveform is not synchronous with the 50Hz one).
 
Maybe you need to have a timer and delay using a LM555+CD4017 LM555VaryPerA.GIF johnson counter for your 6sec delay ?
 

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