Hello All,
I checked the previous posts and comments, however I am still a bit unsure about how to progress, can you help?
First I had the 4 Sharp IRs with the 0.5 amp arduino, in Max/MSP they were very noisy. Now I use an other power supply with 1.2 amp, which gives me a more reliable signal, though it still gives me the spikes I assume I can only get rid of with resistors and capacitors.
If I increase the amp (2.5) would this give me an even more reliable signal, perhaps without the peaks?
Do I need ONE capacitor (polarized electrolytic (100uf) across the v and ground terminals of EACH IR sensor and 10R resistor in line of the +ve line just before the IR sensor and capacitor?
Or do I need resistors with each IR sensor?
hello, thank you for the help..
I got further, but he spikes are still there.
I put a 0.47uF capacitor at the start of the circuit (like on your page), which helped reducing the noise. And also put 0.22uF capacitors parallel to the IR sensors, which I don't think made a lot of change.
I also experimented with resistors, but with no luck, if I use 100R resistor before the IR, the pikes vanish, but the signal too... there is no signal. If I use a smaller resistor (10R) there is a steady noise coming with the signal. I would not say I understand why?
I have tried smaller capacitors, with no luck.
I am using a power supply which gives me only 4.5V and the wires from the breadboard to the sensors are about a meter long, could any of these be a problem?
I am using a power supply which gives me only 4.5V and the wires from the breadboard to the sensors are about a meter long, could any of these be a problem?
Yes defiantly. Wires need to be short and the supply needs to be what you expect not lower. Try decoupling each end.
Have you tried inductors in place of the resistors? That is normally the next step and decouple as much as you can.