Raspberry Pi Forums

pidd

Connecting 1000ft aerials to a digital circuit without isolation and protection is never a good idea. Using either coaxial cable or twisted pairs and/or a low pull down resistor (say 50 ohm) at the receiving end will help. Noise tends to be voltage related with little current, a low resistance, high...

pidd

I assumed relays, sorry. The reason I mentioned two supplies is with bigger capacitors the supply voltage rise on power up may be slower and in the past a slow ramp-up of the supply was known to create occasional boot problems. Perhaps modern devices don't have this problem but I still get a warm co...

pidd

Thank you for an excellent reply, I hadn't latched on to recommends being entirely optional and was thinking that they were more like includes/requires.

pidd

Why is http used instead of https? Doesn't seem to have anything to do with this topic. You should start a new topic Thank you for your friendly input, are you a moderator? The subject and original description could also have come about by a man-in-the-middle attack, so I think my question is very ...

pidd

I just require command line PHP, the standard PHP package also loads apache2 so I tried the CLI package (php7.3-cli) but unfortunately this comes without many of the normal modules (eg cURL, GD etc). I know I can install the modules separately but don't want to have to go through that with every ver...

pidd

Why is http used instead of https?

pidd

One big reason is to prevent back EMF from entering the sensitive electronics when the fans are turned off. Isolation of high current loads is half the reason a relay is used. They aren't sharing supplies, it is just a common negative rail. There is no circuit for the back EMF to get back to the bo...

pidd

The black (-) wire of each power supply should be directly connected to to the black (-) wire on each fan and nowhere else.... Not to the protoboard and NOT to the RPi. Why? Fairly normal practice to have a common negative rail. The power supplies should either have isolated outputs (most likely) o...

pidd

Yes some beefier capacitors would help and I hope you have some decent protection diodes across the motor.

You would be much better off with two separate supplies.

pidd

PeterO wrote: ↑
Sun Jun 07, 2020 7:09 pm
This doesn't seem to work correctly on PIOS64 as mine came up with something like "FAILED TO IDENTIFY" (I didn't write it down at the time).

I had that pop up the first time withut PIOS64, then after I went back to scratch it pulled the serial number.

pidd

Have you tried putting it right next to the router, I've had interference problems even when it was 2 feet away.

pidd

Most settings and not held in "dot" files, perhaps none of them were copied across?

pidd

Just for reference, I used the lite image and the SD card was a 32GB Samsung Evo Plus as someone said they are fast. The time I had was 12 minutes +/- a minute, I started on a digital clock at 2038 and glanced at an analogue clock at 2050 it could have finished before then, no idea. No weird charact...

pidd

SD card worked with those files appended BUT, it took forever because it does the partition resize and maybe fsck or whatever. It had me fooled, flashing away for about a minute, then I got diverted as I shutdown the wrong computer, came back to the ZeroW and green light was off, checked a few bits ...

pidd

If you want, I could try your image out.

Create your SD (but don't use it)
create an .img from the SD
zip, tar or gzip it up
Upload it to wetransfer
PM me the link

I'll unzip it, put it on SD, edit network setting to mine, plug it in my ZeroW then watch for smoke.

pidd

The main roadblock to your presentation is that we never announce products in advance, so there is no future products you can reference. I'm sure there are many of us hoping that a strategic advantage at some time will reverse this policy. I can see some reason for the policy but now you are very w...

pidd

Try putting scan_ssid=1 in the network part of the supplicant, not that it should make any difference from your symptoms - but anything is worth a try.

Did you get this new or pre-used, I was wondering if somebody has had a play with the OTP bits?

pidd

Try taking away the key_mgmt line, you don't need it to get things going.

I'd also take pi_bakery out the equation, just use the pi_imager and create the extra files with notepad++ before first boot.

pidd

One trick is to run a weighted average

Average_Temp = (9 * Average_Temp + Current_Temp)/10

pidd

I had the same keyboard drawing too much power problem because also was using a USB drive, I now have a wireless keyboard for less USB power. If it won't boot due to excessive power being drawn then it must be close to the limit in normal operation as well, I prefer to avoid potential crashes.

pidd

Usually makes little difference, however, blowing should be slightly better because it can increase the air pressure at the component and the increased air density can move more heat. The disadvantage of blowing is the slight increase in the build up of dust due to the high input speed and low exhau...

pidd

Do you have to specify what to run inside the terminal eg bash or whatever you want? ie the terminal has to know what to connect to?

pidd

Why not rotate until it no longer detect an obstacle in front of it? You may be needing to look at acceleration when you change speed not just changing suddenly from one speed to another. If you include a gyro then you can measure how much you have turned, relying purely on what you perceive from PW...

pidd

Not knowing anything about Python, I'd google multitasking python before I found a better way.

Normally in other languages I'd put the PS4 stuff inside the video program but I don't use classes

pidd

Netbeans has always been my chosen IDE for my PC and is available on the Pi, no idea if it specifically supports PICs/AVR etc as it more language based

MPLAB is the Netbeans fork for PIC, I have no experience of that but is available for Pi.

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