A adrianvon Member Jan 15, 2014 #1 Hi, I have an analog voltage which varies from 0V to 5V. Is there a way to only allow voltage above 3.5V to pass using a single small component? Thanks in advance.
Hi, I have an analog voltage which varies from 0V to 5V. Is there a way to only allow voltage above 3.5V to pass using a single small component? Thanks in advance.
Nigel Goodwin Super Moderator Most Helpful Member Jan 15, 2014 #2 You need to be FAR more explicit about EXACTLY what you're trying to do - there's no where near enough information in your first post.
You need to be FAR more explicit about EXACTLY what you're trying to do - there's no where near enough information in your first post.
K kubeek Well-Known Member Most Helpful Member Jan 15, 2014 #4 Single component - no, not really. A few components, maybe. How precise and stable does the threshold need to be? What current is to be passed, and how much of it can you use to feed the controling circuit?
Single component - no, not really. A few components, maybe. How precise and stable does the threshold need to be? What current is to be passed, and how much of it can you use to feed the controling circuit?
alec_t Well-Known Member Most Helpful Member Jan 15, 2014 #5 A 3.5V zener diode? Strictly speaking it's current which 'passes', not voltage.
NorthGuy Well-Known Member Jan 15, 2014 #6 I wonder what should happen if voltage is below 3.5V? If you cut it off, it'll be 0V, which is below 3.5V.
I wonder what should happen if voltage is below 3.5V? If you cut it off, it'll be 0V, which is below 3.5V.
cowboybob Well-Known Member Most Helpful Member Jan 15, 2014 #7 adrianvon said: Hi, I have an analog voltage which varies from 0V to 5V. Is there a way to only allow voltage above 3.5V to pass using a single small component? Thanks in advance. Click to expand... Not exactly a single component circuit (I doubt there is such a beast), but a comparator arrangement like this might suit your needs: There are additional modifications that can be used to handle various current requirements. Here's the site with more examples... **broken link removed**
adrianvon said: Hi, I have an analog voltage which varies from 0V to 5V. Is there a way to only allow voltage above 3.5V to pass using a single small component? Thanks in advance. Click to expand... Not exactly a single component circuit (I doubt there is such a beast), but a comparator arrangement like this might suit your needs: There are additional modifications that can be used to handle various current requirements. Here's the site with more examples... **broken link removed**