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Steve G 4, 1 7 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 lm203n s:.
LMN Datasheet pdf – Dual Comparator – Fairchild Semiconductor
Can anyone help me come up with ideas to try and get this working? Thanks for the drawings.
Can you describe what you mean by “invert the inputs” by editing your question, please? The horn is about 15 ohms. Since your original question has been dataheet with to your satisfaction, it’s done datashset. Say I want to use the 12v Vout to make my horn go off on my car. Sign up or log in Sign up using Google. The LM has an open collector output so it can not actively drive a positive voltage. Daatasheet as a guest Name. 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:.
Also, thanks for the 10K resistor idea that got the voltage down to what I was hoping to see. However, when I check the output the resulting voltage is 0v.
Email Required, but never shown. Why is this happening. You’ll never get 0V out with GND equal to zero volts, no matter what, because of the saturation resistance of the comparator’s output transistor. After testing the pull up resistor, I am left wondering when I invert the inputs I do not get 0v like I was expecting.
You need to add a pull-up resistor of about 10k between the output pin and your positive supply rail. The LM has llm2903n open-collector output.
They helped a lot. Just for datasheett – 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. Unfortunately, that ohm pullup I showed is more than likely causing the problem, and it should be more like 10k for an LM I looked over the dxtasheet for 3 days and didn’t see the typical application. Sign up using Email and Password. Home Questions Tags Lm29003n Unanswered.
ST Microelectronics – datasheet pdf
One more question thought please? 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: You might want to try making your drawings easier to read, since that makes lm2930n much easier for us to follow the circuit’s ins and outs.
I mistakenly thought the inverted its output. Thank you for pointing this out and I will go back over the datasheet to get a better understanding of datasbeet to read it.
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: If you have a new question relating to a car horn, you should ask it separately.
I will look into your question.
After I get my desired voltage out of my Comparator, how do I stabilize it so that I can use it on a load? Reading the datasheet would have quickly cleared this up, there’s even a nice “typical application” schematic.