power on delay circuit

[chitta]

Hi
My name is chittaranjan
Pls help me realise the following waveform on power ON
1. HIGH for 2 sec after power ON
2. LOW for 2sec
3.HIGH permanently

 

[MooseFET]

Hi
My name is chittaranjan
Pls help me realise the following waveform on power ON
1. HIGH for 2 sec after power ON
2. LOW for 2sec
3.HIGH permanently

With the specs you gave I would suggest:

Clock motor + brush contacts + 100KV supply.

 

[Randy]

You need to give more info...the waveform is the POWER supply
waveform, or just a signal waveform that is generated on power up?

In either event, a monostable multivibrator ckt in non-retrigger mode,
with a couple of flip-flops will do the trick. If this mediates the
downstream power supply, then a power transistor as well.