Vishay has an excellent guide on how to read an Optocoupler datasheet, available here. 3. Know what kind of Optocoupler you need Not every Optocoupler is created equal, and you’ll need to select the right type for your application. For example, an Opto-Triac is used if you need to ...
Use The minimum number of switching cycles is usually selected in order to not have a long distance between two bursts at the no-load and therefore to avoid the saturation of the optocoupler output transistor. Max number of burst pulses (delta) Size: 4 bits Sets the maximum...
but there is a 2 leg photo transistor, but infrared type only, so I will update the ghost detector to use the photo interrupt, which sells still, as my last few fair child photo transistors will soon be used up for making the home-made optocoupler circuit for the ghost detector...
https://pdf1.alldatasheet.com/datasheet-pdf/view/26344/VISHAY/K817P.html In ltspice I used a K817A, and it has a beta around 1.29 across a fairly wide forward current. I've never really used or measured any that I own. But down the road I will. If I was making a 3904 circui...
These two values are adjusted looking at LLC_FB voltage in burst mode, selecting the values that avoid the saturation of the optocoupler. • Set the "Minimum period to exit burst" at the minimum value 66.7 us, in order to exit burst at very high loads. This parameter is ...
Doing so allows you to easily compare various options based on a variety of specifications, pricing, and availability. It’s also an easy way to quickly access the component’s datasheet. If you regularly read this blog you’ll know that I’m a big fan of ARM Cortex-M microcontroller...
Optocoupler/Isolator DIRECT CONNECTION This is the simplest way. This solution “almost always” works, but with some important warnings. Fig. 2. Direct connection between a 3.3V CMOS and a 5V TTL device is possible. First, when interfacing with TTL inputs, any “modern” CMOS output will ...
OP1 must be biased such that when the sensor is not blocked, the transistor output is at a low voltage below 0.4V to make sure Q2 is off, and when the bullet comes into the sensor blocking the infrared light, the optocoupler transistor output jumps above 0.7V turning the Q2 transistor on...