Please can you suggest a solution?
A long time ago we used to make so much out of relays but my brain is not working as it should. I am sure a simple circuit with a relay or two will fix this problem but I am stuck. I would like to keep it simple with some sort of relay latch for now as whatever I do this week, will no doubt change next week as I discover another problem to solve.
(the easiest way to describe the function and use of this is to translate the problem into a bulb and fan situation)
I have a light bulb that comes on every hour and stays on for 10 minutes. On for 10 mins, off for 50 mins. The supply to this bulb also powers a fan. The fan will always be on at the same time as the bulb but I want to be able to cut the fan power using a single push button if I should be standing near it.
I need a single push button to stop the fan - but 50 minutes later when the bulb comes on again, the fan must run as normal.
I cannot use a toggle switch as there is a danger of me leaving it turned off accidently.
Sounds so easy. I know it must be easy to make a single drop out latch using a relay but my head will not get to where it needs to be.
Please help.
A long time ago we used to make so much out of relays but my brain is not working as it should. I am sure a simple circuit with a relay or two will fix this problem but I am stuck. I would like to keep it simple with some sort of relay latch for now as whatever I do this week, will no doubt change next week as I discover another problem to solve.
(the easiest way to describe the function and use of this is to translate the problem into a bulb and fan situation)
I have a light bulb that comes on every hour and stays on for 10 minutes. On for 10 mins, off for 50 mins. The supply to this bulb also powers a fan. The fan will always be on at the same time as the bulb but I want to be able to cut the fan power using a single push button if I should be standing near it.
I need a single push button to stop the fan - but 50 minutes later when the bulb comes on again, the fan must run as normal.
I cannot use a toggle switch as there is a danger of me leaving it turned off accidently.
Sounds so easy. I know it must be easy to make a single drop out latch using a relay but my head will not get to where it needs to be.
Please help.