WIZARDSV650S
New Member
I am VERY new to electronics so most of the things I find that may be able to help me are hard for me to understand (although I am learning quickly). I made an adjustable timer using this site: http://www.kpsec.freeuk.com/projects/timer.htm
It works and does what I need...sort of. The ouput I have is not going to a bleeper it is going to another electronic device that uses a 9V charge for about one second.
I used a 9V battery to set this up and during the "countdown" I have about half that; 4.58V at the output and then it jumps to the full 9+V at the end. There are two issues here that I need help with.
The less important is: Is there a way to eliminate the 4.58V from reaching my output before it becomes 9+V? (I would like this but it is okay if I cant because the device will not operate at less than 9V)
The more important question is with the output. Currently the output has a duration similar to the input duration which I understand has to do with the capacitor discharge. I want to maintain the 10 minutes it takes to "countdown" but is there a way on the output side to limit the duration of the high (9V) signal to only a second?
Thank you to anyone who can give me an answer to this that I may actually understand.
It works and does what I need...sort of. The ouput I have is not going to a bleeper it is going to another electronic device that uses a 9V charge for about one second.
I used a 9V battery to set this up and during the "countdown" I have about half that; 4.58V at the output and then it jumps to the full 9+V at the end. There are two issues here that I need help with.
The less important is: Is there a way to eliminate the 4.58V from reaching my output before it becomes 9+V? (I would like this but it is okay if I cant because the device will not operate at less than 9V)
The more important question is with the output. Currently the output has a duration similar to the input duration which I understand has to do with the capacitor discharge. I want to maintain the 10 minutes it takes to "countdown" but is there a way on the output side to limit the duration of the high (9V) signal to only a second?
Thank you to anyone who can give me an answer to this that I may actually understand.