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by wh7qq
Sun Aug 25, 2019 2:11 am
Forum: Troubleshooting
Topic: Arduino changes serial port automatically
Replies: 2
Views: 98

Re: Arduino changes serial port automatically

I want to control NeoPixel LED lights with Raspberry pi. The lights are connected with Arduino. When I just check the arduino through my own laptop, the outputs are stable. However, when arduino is connected with Raspberry pi, the code can run for two times (I write while loop for the light) and th...
by wh7qq
Sun Aug 25, 2019 1:26 am
Forum: Troubleshooting
Topic: won't connect to wifi w/ battery?
Replies: 3
Views: 150

Re: won't connect to wifi w/ battery?

If the RPi works with the power from an "official" power supply but not with the ~9v battery pack, it points to the the wiring to and from the buck convertor and the buck converter itself. If the converter is set to a 5V output with no load, it may not deliver that voltage level under load. Either t...
by wh7qq
Wed Aug 21, 2019 7:22 pm
Forum: General discussion
Topic: Uses for Raspberry Pi Zero/Zero W?
Replies: 81
Views: 3186

Re: Uses for Raspberry Pi Zero/Zero W?

I very well may buy another 0W before I buy my first 4B+. I have zeros running IoT tasks around the house and an old B+ running a Pi-hole that could just as well be on a zero. They all run 24/7 happily without benefit of forced air cooling or even heat sinks. The low power consumption is important h...
by wh7qq
Fri Aug 16, 2019 3:57 am
Forum: General discussion
Topic: I got a big issue and i need to fix it before next week
Replies: 26
Views: 2635

Re: I got a big issue and i need to fix it before next week

For such a big urgent issue, you tell us so little: What model RPi..."B+" is rather non-specific and could apply to a variety of models? What size/make/model of uSD card and purchased how? Where were they purchased? How did you burn the images to the uSD card? How did you download and did you check...
by wh7qq
Fri Aug 16, 2019 3:46 am
Forum: General discussion
Topic: I got a big issue and i need to fix it before next week
Replies: 26
Views: 2635

Re: I got a big issue and i need to fix it before next week

For such a big urgent issue, you tell us so little: What model RPi..."B" is rather non-specific? What size/make/model of uSD card and purchased how? How did you burn the images to the uSD card? How did you download and did you check sha256sum of your download .zip to be sure it is complete. It sound...
by wh7qq
Sun Aug 11, 2019 6:08 pm
Forum: General discussion
Topic: WiringPi to be deprecated?
Replies: 12
Views: 1664

Re: WiringPi to be deprecated?

As is often the case with open source software, the solo maintainer gets older, tired, and fed up. It is unfortunate reality. Thanks Gordon, for a really excellent library that has enabled my home automation efforts with simple command-line statements that required no programming skills. It "just wo...
by wh7qq
Sat Aug 10, 2019 7:13 pm
Forum: General discussion
Topic: battery questions
Replies: 4
Views: 197

Re: battery questions

There are some questions that need answers before you start, especially, how long you intend to have it operating on battery power before recharging. For some reason, your first link does not respond for me so I can't speak to the display but the controller board will require 12 volts at an idle pow...
by wh7qq
Fri Aug 09, 2019 9:00 pm
Forum: General discussion
Topic: Run fan off USB port
Replies: 11
Views: 550

Re: Run fan off USB port

Imperf3kt wrote:
Thu Aug 08, 2019 10:32 pm
The black plastic strip won the base of the GPIO can be removed with a small flat screwdriver and working gently from end to end.
Removing it will give you an additional ~2mm of pin you can solder additional wires to without interfering with hats.
Good info...never thought of that.
by wh7qq
Fri Aug 09, 2019 8:20 pm
Forum: General discussion
Topic: Pi 3 - Thermostat Wiring Issue
Replies: 19
Views: 646

Re: Pi 3 - Thermostat Wiring Issue

You obviously didn't read the original post: The color-coding and lead lettering shown is precisely that used on all HVAC systems, and the wiring is connected to the Normally Open contacts on the relays as it should be. All the OP needs is a temperature sensor and he's well on his way to building h...
by wh7qq
Fri Aug 09, 2019 3:00 am
Forum: General discussion
Topic: No video at boot pi3 plus new
Replies: 3
Views: 133

Re: No video at boot pi3 plus new

The RPi (any model but the 4B which needs an adapter) should work directly with an HDMI-TV display but that depends a bit on the display. Converters to VGA displays have special requirements. I believe there is a "sticky" on this forum about display problems and the things to do to resolve them. In ...
by wh7qq
Fri Aug 09, 2019 2:34 am
Forum: General discussion
Topic: Supply 5V 3A
Replies: 2
Views: 128

Re: Supply 5V 3A

You don't tell us what you have connected to the RPi...USB, hats, etc. It sounds as though your load is enough to pull down the supplied voltage below the threshold. You also do not tell us what sort of supply it is, other than that it came with your RPi. Maybe your seller shipped a supply with a sm...
by wh7qq
Fri Aug 09, 2019 2:13 am
Forum: General discussion
Topic: Pi 3 - Thermostat Wiring Issue
Replies: 19
Views: 646

Re: Pi 3 - Thermostat Wiring Issue

The OP provides us with no detail as to how he is connected to any of the components... RPi, relay, or HVAC system so there is no basis for a comment other than that of @pcmanbob and no basis to assume that smell relates to anything the OP cobbled up. If the OP wishes help, complete details of his s...
by wh7qq
Sun Aug 04, 2019 6:50 pm
Forum: General discussion
Topic: Suggestions for a cheap, wireless, and reliable Keyboard/Mouse?
Replies: 23
Views: 845

Re: Suggestions for a cheap, wireless, and reliable Keyboard/Mouse?

A Logitech K400 is what I use most of the time. The keys are a nice size for my knubby fingers and it has a built in trackpad where the number pad would be. This one goes from Pi to Pi a lot. I'm a trackball type of guy so I don't miss not having a mouse. I could link one of my M570's to its dongle...
by wh7qq
Sun Aug 04, 2019 6:21 pm
Forum: General discussion
Topic: First dabble in RPi. Am I going in over my head?
Replies: 7
Views: 371

Re: First dabble in RPi. Am I going in over my head?

The DS 18B20 sensor comes in open (like a to-92 transistor case--small) and fully enclosed and waterproof. It features an I2C connection (2 or 3 wires) and can be paralleled ad infinitum . There is sample code for the single sensor version on the Adafruit site and you can probably find code online f...
by wh7qq
Sun Aug 04, 2019 6:12 pm
Forum: General discussion
Topic: Need a RPi4 case that can be wall mounted
Replies: 10
Views: 480

Re: Need a RPi4 case that can be wall mounted

VESA mount cases have standard mounting spacing and some are specific to the RPi4. Some are open in that the sides are exposed which allows any RPi to fit and some are closed on the sides and made for the 4B. The exposed sides allow room for heat sinks and/or fans and the vertical mounting allows gr...
by wh7qq
Thu Aug 01, 2019 12:13 am
Forum: General discussion
Topic: Church looking for help
Replies: 8
Views: 426

Re: Church looking for help

If you just plug almost any cheap USB cam into the RPi and install guvcview sudo apt update && apt upgrade && apt install guvcview , two windows come up, one with the live image and one with the various adjustments and the big shutter control button. It will automatically take the picture and save/s...
by wh7qq
Wed Jul 31, 2019 10:15 pm
Forum: General discussion
Topic: Raspberry Pi 3 hang
Replies: 2
Views: 97

Re: Raspberry Pi 3 hang

Don't worry about not including a picture...but the model RPi, OS in use (including version), uSD card size/make/model/source, USB usage and particulars for your power supply will be needed if you need any further help. You said "recloning". If you are simply "recloning" your existing uSD, your RPi ...
by wh7qq
Tue Jul 30, 2019 2:14 am
Forum: General discussion
Topic: Covering the 40 pin GPIO header
Replies: 8
Views: 317

Re: Covering the 40 pin GPIO header

I did some additional browsing on this great-looking case/heatsink. Several distributors have it and several styles, with and without fan(s) are available. It seems there is a clearance issue on the ends of the 40 pin GPIO header when a header extension cable is used. There is up to a 5 mm interfere...
by wh7qq
Mon Jul 29, 2019 9:40 pm
Forum: General discussion
Topic: High Endurance SD card
Replies: 47
Views: 18155

Re: High Endurance SD card

Buy cards which are bigger than they should be.. So that the card is never full, buy quality cards and not random crap (e.g. A1 from SanDisk perform well) test them before you use it with h2testw or f3. I am not sure what all the fuss is about. I just have not seen much problem since my early effor...
by wh7qq
Sun Jul 28, 2019 10:55 pm
Forum: General discussion
Topic: Surge protector
Replies: 6
Views: 264

Re: Surge protector

Is it really needed? The little island I live on has notoriously dirty power and failures so frequent and prolonged that I invested $1K+ and shipping to get a 2kw inverter generator. I have several RPis running 24/7 along with a satellite modem and a router...all on provided AC-DC converters. Other ...
by wh7qq
Sun Jul 28, 2019 10:36 pm
Forum: General discussion
Topic: Analog audio input
Replies: 4
Views: 198

Re: Analog audio input

I think both cases I mentioned have a single codec chip (Wolfson and NXP chips) that combine both functions. As they are very inexpensive, there is little or nothing given away by having both. Many of us want/need the record capability and outside of these two, there is practically no competition at...
by wh7qq
Sun Jul 28, 2019 7:45 pm
Forum: General discussion
Topic: Heat Sinks
Replies: 8
Views: 813

Re: Heat Sinks

I ran my RPi 3B mounted vertically behind my monitor on a VESA open-sided case and it overheated (red thermometer icon) so I bought some nice looking copper sinks that came with the black, gooey type of heat tape. In a short time, the sink heated to the point that it slid off the CPU...only gave me ...
by wh7qq
Sun Jul 28, 2019 6:48 pm
Forum: General discussion
Topic: Analog audio input
Replies: 4
Views: 198

Re: Analog audio input

I can't recall the GPIO usage of the AudioInjector so I am unsure if it will play nice with the I2S input on the pHat but it features either full size or zero form factors and its GPIO matches the RPi 1:1. The audio quality is CD level, using the Alsa software that comes with Raspbian (and most othe...
by wh7qq
Sat Jul 27, 2019 10:22 pm
Forum: General discussion
Topic: Using the pi as Hi Fi system.
Replies: 11
Views: 807

Re: Using the pi as Hi Fi system.

It may just be that their listing is out of date but I see nothing in Moode's web page to indicate that they support the AudioInjector or FE-PI hats, both of which have ADC as well as DAC capabilities. Nearly all of the devices shown on Moode's device support page are DAC only with just a few having...
by wh7qq
Sat Jul 27, 2019 9:17 pm
Forum: General discussion
Topic: Official Pi 4 case - likes/dislikes
Replies: 6
Views: 518

Re: Official Pi 4 case - likes/dislikes

I have an early Flirc case for one of my B+ RPi's. It is a nice looking case and seems to function as described. It featured a velvety textured plastic top and bottom that really felt nice until it became sticky and gooey. I had to remove it with alcohol to get down to the base plastic. I don't have...

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