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by mahjongg
Mon Sep 17, 2018 5:14 pm
Forum: General discussion
Topic: Reporting posts - Clarification sought
Replies: 28
Views: 562

Re: Reporting posts - Clarification sought

jamesh I, for one, will not be sucumbing to this nonsense. I'm glad to here that James. Let's see what happens when the master/slave issue turns up on the Python sub forum here. I agree with Jamesh, Lets not succumb completely to any political correctness craziness from "social justice warriors", o...
by mahjongg
Mon Sep 17, 2018 2:55 pm
Forum: General discussion
Topic: Raspberry as Commercial Arcade
Replies: 3
Views: 114

Re: Raspberry as Commercial Arcade

I happen to know that a great many arcade owners replace the failing electronics in retro arcade machines with PC's, and more recently with raspberry PI's, running some kind of emulator (MAME) as its often the only way of giving people the experience they want. They often use specific USB adapter ha...
by mahjongg
Mon Sep 17, 2018 2:45 pm
Forum: General discussion
Topic: Reporting posts - Clarification sought
Replies: 28
Views: 562

Re: Reporting posts - Clarification sought

Ha, you beat me to it B.Goode. Assuming you actually did as you say of course. Well yes he did actually.... I see, another cozy get-together, please keep it polite as always. Being a moderator is an ungrateful job, but someone has to do it. :mrgreen: :ugeek: :ugeek: trolls are not banned because of...
by mahjongg
Mon Sep 17, 2018 11:58 am
Forum: General discussion
Topic: Power led not on?
Replies: 4
Views: 111

Re: Power led not on?

The power LED doubles as a "power not OKAY" LED, and goes out if the input voltage, (after the PI's polyfuse) sinks below 4.65V, at the same time an icon should appear in the top right corner warning of a power fail condition. All the above is true for raspberry PI2's and 3's. Not for the original R...
by mahjongg
Mon Sep 17, 2018 11:54 am
Forum: Troubleshooting
Topic: Pi won't boot although SD card is just fine
Replies: 2
Views: 58

Re: Pi won't boot although SD card is just fine

Read the boot problem sticky in trouble shooting.
The PI, once booted should run indefinitely without "shutting down"
by mahjongg
Mon Sep 17, 2018 11:38 am
Forum: Off topic discussion
Topic: HTML inserted into forum drafts
Replies: 5
Views: 1979

Re: HTML inserted into forum drafts

I will notify the other moderators, and forum administrators. For now it seems you only get this if you do something very specific, you can just preview your posts, and continue editing it without a problem. I have never used drafts, let alone used the "manage draft" function in the user control pan...
by mahjongg
Mon Sep 17, 2018 9:41 am
Forum: Off topic discussion
Topic: HTML inserted into forum drafts
Replies: 5
Views: 1979

Re: HTML inserted into forum drafts

I don't see any HTML code in the page of the link you posted, nor am I aware the current BBS software exhibits such behaviour.
maybe its an issue with your browser.
by mahjongg
Mon Sep 17, 2018 9:24 am
Forum: Other projects
Topic: Need help Bcm/pwm 18, pin 12 low voltage
Replies: 3
Views: 56

Re: Need help Bcm/pwm 18, pin 12 low voltage

its (just now) 2.4 Volt on average, as a PWM pin is rapidly switching between 3v3 and 0v.
by mahjongg
Sun Sep 16, 2018 4:36 pm
Forum: General discussion
Topic: POE Hat Quarantine (Orders Blocked due to Hardware Issue)
Replies: 10
Views: 289

Re: POE Hat Quarantine (Orders Blocked due to Hardware Issue)

Only if your USB ports do.not work.with this POE device, otherwise you might decide to keep Them, its up to you.
by mahjongg
Sun Sep 16, 2018 4:25 pm
Forum: General discussion
Topic: POE Hat Quarantine (Orders Blocked due to Hardware Issue)
Replies: 10
Views: 289

Re: POE Hat Quarantine (Orders Blocked due to Hardware Issue)

Iets not a safety issue, but the foundation found that the Ripple the POE HAT generates triggers one of the USB overcurrent protection chips used in PIs
So they want to Fix that before continueing the sales
by mahjongg
Sat Sep 15, 2018 8:55 pm
Forum: Automation, sensing and robotics
Topic: Raspberry PI 3+ serial connection to WindSonic sensor, help needed.
Replies: 10
Views: 207

Re: Raspberry PI 3+ serial connection to WindSonic sensor

Note that the RPI serial input is NOT "TTL", compatible it is using 3V3 logic, not 5V (TTL) PI's are not 5V tolerant. You need an RS232 converter that uses 3V3 levels, (based for example on a MAX3232) or you will still damage your PI. Also people who want to say TTL can mean its using 3V3, then let...
by mahjongg
Sat Sep 15, 2018 8:42 pm
Forum: Other programming languages
Topic: launching C# code
Replies: 13
Views: 334

Re: launching C# code

moved, added "C#" to subject.
carry on......
by mahjongg
Fri Sep 14, 2018 4:42 pm
Forum: Advanced users
Topic: Raspberry Pi GPIO at 3.5V
Replies: 2
Views: 136

Re: Raspberry Pi GPIO at 3.5V

In principle you can get a latch up effect if you raise the GPIO one diode forward drop over the supply voltage, so a parasitic internal diode can start conducting. 3.5V is just 0.2V over the medium 3.3V supply, so its not very likely the parasitic diode starts conducting current, but why take a ris...
by mahjongg
Thu Sep 13, 2018 5:15 pm
Forum: General discussion
Topic: how to use 40 pin gpio cable extender
Replies: 9
Views: 257

Re: how to use 40 pin gpio cable extender

jaisonpanikar was banned, and any posts by him that had spam in them have been deleted, that is why there is nothing in this thread anymore by him. Let me also use this post to warn against using 80-wire cables, as is made clear in this "pitfall sticky" https://www.raspberrypi.org/forums/viewtopic.p...
by mahjongg
Thu Sep 13, 2018 5:00 pm
Forum: Beginners
Topic: Bluetooth headphones
Replies: 28
Views: 418

Re: Bluetooth headphones

Deleted the poll after several complaints about it. Don't think a poll like this (with just a yes no, maybe choice) serves a useful purpose anyway. please post about your results in the forum instead, that is much more helpful, as it can give a better insight what could be the cause. Not that I have...
by mahjongg
Thu Sep 13, 2018 4:56 pm
Forum: Troubleshooting
Topic: Dual Boot Without Berryboot?
Replies: 9
Views: 1531

Re: Dual Boot Without Berryboot?

DirkS wrote:
Thu Sep 13, 2018 4:24 pm
edu_man wrote:
Thu Sep 13, 2018 3:18 pm
this article and follow all the steps. It's just simple process.
Not on a Pi...
Indeed, the article is about installing kali linux on an X86 PC, not on a raspberry PI, so you cannot follow the article when installing kali linux on a PI.
by mahjongg
Thu Sep 13, 2018 1:42 pm
Forum: Other projects
Topic: Halloween / Christmas lights for front yard
Replies: 6
Views: 178

Re: Halloween / Christmas lights for front yard

Using relay modules can be tricky as many are designed to be controlled with 5V (TTL) logic, not 3.3V logic, and won't work well when controlled with 3.3V signals.
the problem is described in this "pitfall sticky": https://www.raspberrypi.org/forums/view ... 8#p1225448
by mahjongg
Wed Sep 12, 2018 4:53 pm
Forum: Gaming
Topic: Help -SNES controller stopped working for gameplay, but works in the menu's.
Replies: 2
Views: 112

Re: Help -SNES controller stopped working for gameplay, but works in the menu's.

Guessing you use it in Retropie, did you try installing (retraining) the joystick setting again?
If you can use it for the menu's, then its not a hardware problem.
by mahjongg
Wed Sep 12, 2018 4:49 pm
Forum: Beginners
Topic: Illuminated push button
Replies: 41
Views: 731

Re: Illuminated push button

If the lamp still lights with reversed polarity (and the lamp polarity is not specified), its simply a cheap filament light (99% sure of that). Especially if the switch is an arcade button (very conservative people arcade designers, they stick by what works). It will probably use 5V at 100mA or so, ...
by mahjongg
Wed Sep 12, 2018 4:41 pm
Forum: General discussion
Topic: No Red LED [solved]
Replies: 5
Views: 175

Re: No Red LED

A 2B has the undervoltage protection circuit, which turns the power LED off when the input voltage drops under 4.65V, but you should also get a lightening icon when that happens. In principle software can turn the LED off, if the GPIO that senses an undervoltage is switched to an output, and outputs...
by mahjongg
Wed Sep 12, 2018 4:26 pm
Forum: Off topic discussion
Topic: Water proofing electronic components
Replies: 4
Views: 1218

Re: Water proofing electronic components

Araldite is an epoxy based two component glue, used to glue die's (chips) to die-carriers, but can also be used as an air/water tight cover. It has good thermal conductivity properties. Farnell sells a whole range of potting epoxies. https://nl.farnell.com/w/c/chemicals-adhesives/potting-compounds/p...
by mahjongg
Wed Sep 12, 2018 9:58 am
Forum: Automation, sensing and robotics
Topic: Raspberry PI 3+ serial connection to WindSonic sensor, help needed.
Replies: 10
Views: 207

Re: Raspberry PI 3+ serial connection to WindSonic sensor

Note that the RPI serial input is NOT "TTL", compatible it is using 3V3 logic, not 5V (TTL) PI's are not 5V tolerant. You need an RS232 converter that uses 3V3 levels, (based for example on a MAX3232) or you will still damage your PI. Also people who want to say TTL can mean its using 3V3, then let ...
by mahjongg
Wed Sep 12, 2018 9:48 am
Forum: General discussion
Topic: Struggling to get an ADC working
Replies: 6
Views: 191

Re: Struggling to get an ADC working

The reason no PI has an ADC is that the SoC in the PI was not designed for such a use case. Also, it would require the silicon process used in the SoC to support analog circuits, but the SoC is an all digital chip. Its actually quite rare for a "computer chip" to support analog circuitry, its really...

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