LM2903N DATASHEET PDF

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LMN Fairchild Semiconductor, LMN Datasheet

In general, inputs come from the left and the top of the drawing, and outputs go out the bottom lm2903 the right, kinda like this, after adding the pullup to the comparator’s output: Matthew Tubbs 5 1.

The horn is about 15 ohms. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Why is this happening. You might want to try making your drawings easier to read, since that makes it much easier for us to follow the circuit’s ins and outs. Sign up using Email and Password.

Just for grins – since you want to learn about comparators – it might be fun to take a look at the two circuits below and figure out why VOUT2 switches and VOUT1 doesn’t, even though VIN is the same input to both circuits. They helped a lot.

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Sign up using Facebook. Left click on the graphic to make it go full-screen and, by the way, here’s the LTspice circuit list just in case you want to play with the circuit s: I mistakenly thought the inverted its output. Comparator help LmN Ask Question. Unfortunately, that ohm pullup I showed is more than likely causing the problem, and it should be more like 10k for an LM Since your original question has been dealt with to your satisfaction, it’s done with.

If you have a new question relating to a car horn, you should ask it separately. Email Required, but never shown. I will look into your question. My wiring diagram looks similar to this picture I created in LTspice.

However, when I check the output the resulting voltage is 0v. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

LMN Datasheet(PDF) – National Semiconductor (TI)

By using our site, you acknowledge that you have read and understand our Lm2930n PolicyPrivacy Policyand our Terms of Service. I am using a LMN to learn about comparators.

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Left click on the graphic to make it go full-screen and, by the way, here’s the LTspice circuit list just in case you want to play with the dqtasheet s:. Sign up or log in Sign up using Google. After testing the pull up resistor, I am left wondering when I invert the inputs I do not get 0v like I was expecting.

LM2903N Datasheet

You need to add a pull-up resistor of about 10k between the output pin and your positive supply rail. Steve G 4, 1 7 Home Questions Tags Users Unanswered. In general, inputs come from the left and the top of the drawing, and outputs go out the bottom and the right, kinda like this, after adding the pullup to the comparator’s output:.

For a better handle on what’s going on with an LM, take a a look at the data sheetparticularly at Figure 3. I looked over the datasheet for 3 days and didn’t see the typical application. One more question thought please? pm2903n

The LM has an open-collector output. Post as a guest Name.