|
What transistor(PNP or NPN) is best to connect an IR proximity sensor using IC LM358 to connect to a 5V Relaly? |
December 16, 2020 |
|
You can use a "Phototransistor". Which one? preferably one which matches the "Peak wavelength" of the IR emitter (from 570 to 990 nm), the current it lets passing through in the "dark", the current you want to pass through under "light", the raise time and fall time (how responsive it has to be), the voltage to block, etc... Check Mouser/Digikey/etc, they have a nice set of filters to help you to choose the ones that fit your case. |
December 18, 2020 |
No answers yet. Contribute your answer below!
You must log in or create an account (free!) to answer a question.
Anyone can ask a question.
Did you already search (see above) to see if a similar question has already been answered? If you can't find the answer, you may ask a question.
CircuitLab's Q&A site is a FREE questions and answers forum for electronics and electrical engineering students, hobbyists, and professionals.
We encourage you to use our built-in schematic & simulation software to add more detail to your questions and answers.
Acceptable Questions:
Unacceptable Questions:
Please respect that there are both seasoned experts and total newbies here: please be nice, be constructive, and be specific!
CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.