The length of these is enough.
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I have been trying to find information related to why the WAS uses the MC7805CTG for 5volts while the other 5volt supplies use the K7805M-1000R3.
I would really appreciate an explanation.
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I would also be curious to know. I suspect it is that the WAS isn’t as picky as the other parts so they use a cheap linear regulator for that and use the more expensive switching converters for the more critical parts.
I believe the switching regulators are far too noisy for the ads to function properly.
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At the same time, the SMPS produces high-frequency sound due to the switching operation of the MOSFET. This noise may be reflected in the output voltage; However, on some advanced and expensive models, this output noise is somewhat attenuated. Also, switching creates electromagnetic and radio frequency interference. Therefore, it is necessary to use RF shielding and EMI filters in SMPSs. Therefore, SMPS are not suitable voice and radio frequency applications.
Since linear voltage regulators such as the 7805 do not produce any noise, the output voltages are clean, and the sensitive sensors connected to this output work more accurately.
switching regulators
Lineer voltage regulator
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Hi there.
I am connecting the teensy and cannot understand the ethernet headers. Can someone identify the cause of the problem and point me towards the correct parts online please? Not sure if JLCPCB have used the wrong parts or I am using the wrong ethernet parts ? Thank you in advance
See that part soldered into the AIO? Leave it in place and solder the same part into the Teensy.
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Ah ok that makes sense. Am trying to find that online with no luck. Would it be called a 2mm pitch socket?
It is the opposite as already explained, WAS needs clean power. I’d add that a linear regulator produces a lot of heat at high currents (and high voltage drop from input to output), that is why the high efficiency switching regulator is better for all the rest.
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So for the wiring harness it works best to feed my 5v pressure sensor with the 5v as the WAS. Will this be a problem?
I don’t think so, it’ll be the cleanest (noise free) 5V you can get. As long as your pressure sensor isn’t using more than a few mA of current.
Hi just take a normal header pin and softly press it in from top side teensy. Just that it just tips above teensy bord then solder and done. Made 5 aio like this never had a problem.
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What’s the difference between Pin 22 (+12V in) and Pin 20 (+12V Board)?
Pin 22 is the 12v+ supply to the PCB from the tractor battery.
Pin 20 is a 12v output, not often used and if you do should be limited and fused to 1 amp.
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ok, and how do I turn the board on/off when the power comes directly from the battery. There’s no relay or anything on the board?
I have done about 15 boards with these headers below. Just trim them off just below the gold plating.
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These fit perfectly:
You need overall length of approx. 13.5mm, the above are 13.59mm.
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Thank you for the replies all.
I looked locally and couldn’t find any solutions. Teensy is not very common here in New Zealand.
Both Diji-key and Mouser have shipping rates of over $20 and a weeks wait.
I found the earlier suggested socket on RS and have ordered that. It said “can ship immediately” which usually comes next day delivery…and now I find delivery will be the 17/07 regardless 
I now know for any further sytems I build. This is hopefully the last part I am waiting on.
Didn’t notice until last night but are the V4.1 Standard boards supposed to not have the tactile button for steer switch placed? Is there a reason for them being absent?