- #Photo transistor cross reference series
- #Photo transistor cross reference tv
- #Photo transistor cross reference free
(2) At an IF of 30ma the VF is 1.2V to 1.4V To operate the transmitter LED the way that the manufacturer recommends on the data sheet, you need: You can simply forget all the other stuff for your present work
(2) Voltage the opto transistor will stand (1) Current flow when light impinges on the opto transistor There are, once again, only two characteristics you need from the data sheet for the opto sensor transistor: Incidentally you can convert some BJTs into opto sensors by removing the casing. To conduct, normal BJTs require base current, but they will also conduct if light impinges on their junctions. The opto receiver is a fairly normal bipolar junction transistor (BJT) which has a window built into it.
In this application there are only two bits of information you need to know about the LED:
#Photo transistor cross reference tv
Note that you may not be able to see any light from the LED because the light frequency is liable to be outside human eye capabilities, typically infrared, like a TV controller. The transmitter is nothing more than a Light Emitting Diode (LED) and the receiver is a light sensitive transistor. But if something opaque is placed in the slot, light cannot reach the receiver so the signal from the receiver stops. Under normal circumstances, with nothing in the slot, light shines from the transmitter into the receiver and produces a signal at the receiver. Transmissive slot photo detectors, have a light source shining from one side of the slot and a opto detector at the other side. The latter is the performance of the component when configured as specified on the data sheet. The former are the limits: temperature, voltage, current, etc, that the device can be exposed to without damage. It also covers Absolute Maximum Ratings and Electrical (and Optical in this case) Characteristics.
#Photo transistor cross reference free
Incidentally design engineers are never short of free samples, data, and support.Ī data sheet covers various aspects of the components characteristics, physical, and electrical being the broad areas. That is why data sheets are often so complex. The manufacturer is always keen to get his products specified in a design because that could mean sales of millions if a main line consumer product takes off, so he tries to incorporate all the data a design engineer would need. This is not the position with certain data sheets, but in the main they are very good. One of the most daunting aspects in electronics is understanding component data sheets, but you are lucky this one is simple, particularly well-written, and clear. Incidentally that is a fairly good rule for many situations when you are not certain about what is going on.Ībove is an extract from the Omeron EE-SX198 slot opto detector data sheet where I have physically inverted the transmitter LED in the schematic to make the operation clearer the connections etc are still the same.
#Photo transistor cross reference series
In general always apply a voltage via a series resistor to limit the current. The problem, I expect is that you have been placing a voltages on parts of the photo detector which has caused a large current to flow and melted the semiconductor material. I am surprised that you have managed to blow some up because, under normal circumstances, that is practically impossible. Well the good news is that they are quite simple to understand and work with. I see you are working with photo detectors now.
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