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Vdc output ramp up&hold or ramp down&hold on input trigger change low-high high-low

benbiles

Jan 26, 2014
12
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Jan 26, 2014
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Anyone know an easy way to output a Vdc ramp up and hold or a ramp down and hold alternately when an input Voltage goes from low to high or high to low ??? changes state ??

Hope I have described that one correctly !!

Its for another project on this forum but thought I should keep it separate in case it could help anyone else looking for this solution!

Should I be using a 555 timer for this ? or just RC and transistor ? The ramp doesn't have to be perfect ramp ! only the duration ( speed of ramp ) is important.

Maybe this has been answered on the forum before but I couldn't find an example of a hold at the top or bottom of the ramp..

A very long time could work but infinite until Vdc input change would be cleaner design !:D
 
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