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ok I took a closer look at the car's wiring diagram. It seems that I connected to a circuit that closes the horn's relay. Which means I didn't even connected directly to the horn's circuit.
Which means much lower currents. Which make it be safer to use without a relay at all. The original...
that method require to active the horn.
What I would like is to check the fuse very time I restart the system. Without activating the horn.
Is that possible?
what do you mean the fuse is no use?
just to be clear - X is connected to the ground through the fuse. Not directly in any way.
My idea was that X is connected to digital input of the arduino. Then if the fuse is correct, the input reads "0". and if not - I'm not sure what happens or how to...
Right
The horn is the horn of the car. It is always connected to the 12v, so once you connect the ground, it beeps.
The fuse is my fuse. I connect it in the negative, because I don't touch the positive in the project. As I mentioned - it is 12v fixed. I just switch the ground to the horn.
The...
Hi
I'm working on a little project. A part of it is to connect to the car's horn.
I want to use a fuse in the way.
The problem is that in a usual use of the system I have no way to know if the fuse is burnt and it is critical.
I attached a diagram. Sorry if it is not very professional :roll...
Ok then....I'll have to say goodbye to the PCB idea.
Even if I had 1oz copper clad, I wouldn't get near 5 times maximum current.
I'll go with another type of heating surface.
Too bad. Could be fun making my own
Thanks for the advice
Thanks for the answer. If I see it right - there's no way to reach 400w with 0.5oz/ft^2.
Just to make sure - is the "Max Current" is when the copper break? or just the recommended max current?
Hi
I'm new in PCB designing. I've read a lot and didn't find the answer I seek.
Long story short - my question is what happens when driving too much current through too narrow trace?
Will it limit the current? or will it break and open the cirucit?
The full details:
I'm trying to design a...
Those are some bad new...
But it's better to know now than later.
One last question about it - Is it possible to write a m-script and put it as a block in simulink?
I want to know if I can still work, partly, with simulink
Could you please explain what you mean - simulink is not suitable for real-time?
I mean - It has an external mode. It has blocks specific to Arduino (and other microcontrollers as well)
My whole project is based on simulink, so it is very important to me. Please explain
Eventually, the signal is supposed to come from a receiver, as a PWM signal, and enter the Arduino microcontroller.
But the problem happens before getting any signal from the real world.
I attached an image of a very simple model. While in simulation mode, it works very fast, of course.
If I...
Hello
I'm trying to find the duration of a pulse of an incoming PWM. I'm using Simulink for that.
First I tried to use a counter to count microseconds between rising and falling trigger.
It worked great on simulation, but when I tried it on external mode (as I need this model to be),
the...
OK guys, I got it figured out, and to be honest...it is pretty embarrassing.
Common ground.
The arduino and the L7805 must have common ground (the embarrassing part is that I knew it)
Thanks for all the help!
I checked with a new circuit and new 7805.
I only connected the 7805 and the 3 capacitors, so I'm sure I didn't need more voltage (Vin = 12v).
Though, I didn't put any resistors either...could it lead to a very high current that reached the 7805's limit?
I will also check if the problem is the...
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