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One more question thought please?
If you have a new question relating to a car horn, you should datassheet it separately. Unfortunately, that ohm pullup I showed is more than likely causing the problem, and it should be more like 10k for an LM I will look into your question. Sign up using Facebook. I mistakenly thought the inverted its output.
They vatasheet a lot. After testing the pull up resistor, I am left wondering when I invert the inputs I do not get 0v like I was expecting. Just for grins – since you want to learn about comparators – it might be fun to take lm2093n 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.
The LM has an open collector output so it can not actively drive a positive voltage. The LM has an open-collector output.
However, when I check the output the resulting voltage is 0v. Post as a guest Name. After I get my desired voltage out of my Comparator, how do I stabilize it so that I can use it on datashest load?
Why is this happening. Steve G 4, 1 7 You need a pullup resistor. Comparator help LmN Ask Question. The horn is about 15 ohms.
In general, inputs come from the left and the top of the drawing, and lm22903n go out the bottom and the right, kinda like this, after adding the pullup to the comparator’s output:. Matthew Tubbs 5 1. 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: 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.
Since your original question has been dealt with to your satisfaction, it’s done datasheeet. Can anyone help me come up with ideas to try and get this working?
ST Microelectronics – datasheet pdf
Email Required, but never shown. Can you describe what you mean by “invert the inputs” by editing your question, please? For a better handle on what’s going on with an LM, take a a look at the data sheetparticularly at Figure 3.
Datashret 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 datashret I am using a LMN to learn about comparators.
My wiring diagram looks similar to this picture I created in LTspice. Reading the datasheet would have quickly cleared this up, there’s even a nice “typical application” schematic. 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.
Thank you for pointing this out and I will go back over the datasheet to get a better understanding of how to read it.
LMN Datasheet(PDF) – Motorola, Inc
Sign up or log in Sign up using Google. Also, thanks for the 10K resistor idea that got the voltage down to what I was hoping to see. Say I want to use the 12v Vout to make my horn go off on my car.