Go to advanced search

by wh7qq
Sat Oct 17, 2020 8:21 pm
Forum: General discussion
Topic: Why is there no brightness control?
Replies: 4
Views: 262

Re: Why is there no brightness control?

Even the ancient Viewsonic I am using has a power switch that shuts off the display. Let your fingers do the walking...
by wh7qq
Thu Oct 15, 2020 2:13 am
Forum: General discussion
Topic: SSR Relay directly to GPIO
Replies: 11
Views: 15373

Re: SSR Relay directly to GPIO

I have driven a SSR directly from an RPi zero W to switch a 20 Amp 230 volt water heater element. In this case, a Berme 1-4840DA but I have previously used a similar FOTEK relay with no problem. There are lots of similar devices on the internet but you do need to be sure a 3.0 volt turn on is specif...
by wh7qq
Thu Oct 15, 2020 1:05 am
Forum: General discussion
Topic: Looking for a faster 40-pin connection
Replies: 7
Views: 328

Re: Looking for a faster 40-pin connection

This may not be exactly what you are looking for but it might, with a 40 pin cable, do the job. https://shop.audioinjector.net/detail/D ... nnect+clip
by wh7qq
Wed Oct 07, 2020 7:13 pm
Forum: General discussion
Topic: RPi 4 and SSD power supply
Replies: 2
Views: 133

Re: RPi 4 and SSD power supply

Probably OK but just do it and see. Worst case, you have to run the SSD off of a USB hub with its own supply.
by wh7qq
Wed Oct 07, 2020 4:06 am
Forum: General discussion
Topic: unable to see some websites
Replies: 5
Views: 244

Re: unable to see some websites

It would help to know what DNS servers you have set. Also, which browser(s) are you using? Raspberry Po OS supports Chromium. Firewall? Google DNS servers (8.8.8.8 and 8.8.4.4.) are usually faster and better than ISP provided servers. Also OpenDNS (208.67.222.222 and 208.67.220.220). These may updat...
by wh7qq
Wed Oct 07, 2020 3:53 am
Forum: General discussion
Topic: Network issue
Replies: 6
Views: 338

Re: Network issue

You mention an enclosure but you don't get specific. Is it metal?
by wh7qq
Fri Oct 02, 2020 8:51 pm
Forum: General discussion
Topic: Imaging an RPi SDcard on another RPi, how?
Replies: 17
Views: 527

Re: Imaging an RPi SDcard on another RPi, how?

Maybe I misunderstood you but rather than creating a .img file that might contain the problems you are trying to fix, just create a new uSD with the latest Raspberry OS, boot it up, configure it and copy the data over from the old disk...just your data files.
by wh7qq
Fri Oct 02, 2020 3:51 am
Forum: General discussion
Topic: RPI 4 4GB, SAMSUNG 1TB SSD fails to boot
Replies: 11
Views: 397

Re: RPI 4 4GB, SAMSUNG 1TB SSD fails to boot

Had not heard of that non-support but a better bet anyway is to use Raspberry Pi OS desktop or Lite, depending on your need. See the instructions at https://www.raspberrypi.org/downloads/. There are also instructions for the SSD setup.
by wh7qq
Thu Oct 01, 2020 8:05 am
Forum: General discussion
Topic: SD card: not recognized as a mass storage, no partition found
Replies: 11
Views: 389

Re: SD card: not recognized as a mass storage, no partition found

@ wh7qq: I don't understand you, and I guess you don't understand me. My system SD card I am booting from is fine, what I wrote was what gparted showed about the system SD (SD-slot). The issue is about an inserted 2nd SD card which is not detectable: The 2nd SD card (/dev/sda, via multiple different...
by wh7qq
Thu Oct 01, 2020 2:21 am
Forum: General discussion
Topic: SD card: not recognized as a mass storage, no partition found
Replies: 11
Views: 389

Re: SD card: not recognized as a mass storage, no partition found

#1 is to check the integrity of the SD card. A free Windows utility called h2testw" can do that. It does overwrite the entire contents of the card so if anything is there, back it up. It will test the speed and size of your SD card and read it back. #2 is to put a windows partition on the "good" ca...
by wh7qq
Wed Sep 30, 2020 8:32 pm
Forum: General discussion
Topic: SD card: not recognized as a mass storage, no partition found
Replies: 11
Views: 389

Re: SD card: not recognized as a mass storage, no partition found

#1 is to check the integrity of the SD card. A free Windows utility called h2testw" can do that. It does overwrite the entire contents of the card so if anything is there, back it up. It will test the speed and size of your SD card and read it back. #2 is to put a windows partition on the "good" car...
by wh7qq
Wed Sep 23, 2020 9:33 pm
Forum: General discussion
Topic: USB ports overheating and melting WiFi dongle
Replies: 1
Views: 137

Re: USB ports overheating and melting WiFi dongle

From your post, it is a little hard to sort out the cart/horse order. In any case, it may be a good time to start from scratch. Remove everything that you have connected to the RPi except the power supply and load a fresh copy of the latest Raspi OS desktop version. Does it boot and run normally? Ru...
by wh7qq
Wed Sep 23, 2020 7:49 pm
Forum: General discussion
Topic: IR LED lights for Pi Noir V2
Replies: 9
Views: 408

Re: IR LED lights for Pi Noir V2

And we do our best! That is all that can be asked for. Maybe we all need to remember that this is a volunteer forum that leans heavily on user's shared experience. Still, most of us have experienced the frustration of unanswered posts when we have a problem. It's nice to get an authoritative answer...
by wh7qq
Tue Sep 22, 2020 9:02 pm
Forum: General discussion
Topic: IR LED lights for Pi Noir V2
Replies: 9
Views: 408

Re: IR LED lights for Pi Noir V2

Yes some posts will slip through the cracks, so it is reasonable to ping a thread after 4 to 5 days of no response, but there isn't really an issue here. The likelihood of a post being answered is inversely proportional to its position on "the list". When a user must sit on his thumbs for 36 hours ...
by wh7qq
Mon Sep 21, 2020 7:49 pm
Forum: General discussion
Topic: IR LED lights for Pi Noir V2
Replies: 9
Views: 408

Re: IR LED lights for Pi Noir V2

Attachment possibly. Power definitely not. https://www.raspberrypi.org/products/pi-noir-camera-v2/ shows 4 MOUNTING holes. They do NOT provide any power, never have done, and never will. Waveshare made a [url=https://www.waveshare.com/rpi-camera-f.htm]clone of the v1 OV5647 camera module[/flash] wh...
by wh7qq
Sun Sep 20, 2020 5:56 pm
Forum: General discussion
Topic: IR LED lights for Pi Noir V2
Replies: 9
Views: 408

Re: IR LED lights for Pi Noir V2

The official noir camera shown on the "Products" page of this website shows two holes that provide attachment for the IR lights on either side of the lens. Did you purchase something other than the "official" noir camera? If so, it would help if you showed its image as well as the lights. Do you int...
by wh7qq
Sun Sep 13, 2020 3:43 am
Forum: General discussion
Topic: Which Pi to buy?
Replies: 10
Views: 574

Re: Which Pi to buy?

Depends a bit on what else you want it to do. If you only want the camera and wifi capability, maybe you don't need the power of the RPi...programmability, other software, extensive GPIO, desktop, etc. An esp32-cam might do the job nicely and has the deep sleep mode to minimize power consumption, th...
by wh7qq
Thu Sep 03, 2020 2:33 am
Forum: General discussion
Topic: How can I measure a capacitor with raspberry pi?
Replies: 32
Views: 1669

Re: How can I measure a capacitor with raspberry pi?

I'd love to see that, I worked in calibration, measuring low picofarad capacitors with any equipment is extremely difficult as you have to cancel out any stray capacitance, inductance and noise. I'm not sure I've seen a multi-meter that will measure low picofarads. Did you get your units wrong? Obt...
by wh7qq
Tue Sep 01, 2020 7:44 pm
Forum: General discussion
Topic: How can I measure a capacitor with raspberry pi?
Replies: 32
Views: 1669

Re: How can I measure a capacitor with raspberry pi?

Standard capacitors for calibration???
by wh7qq
Mon Aug 31, 2020 4:40 pm
Forum: General discussion
Topic: How can I measure a capacitor with raspberry pi?
Replies: 32
Views: 1669

Re: How can I measure a capacitor with raspberry pi?

I have no idea on your need to measure capacitance on the RPi 4, especially when you can do so on your multimeter already. Doing so with considerable accuracy in the low picofarad range is trivially easy on the Arduino and requires essentially NO external devices. I found my multimeter woefully inad...
by wh7qq
Sat Aug 29, 2020 9:00 pm
Forum: General discussion
Topic: Before I break something... please check my work on this project.
Replies: 2
Views: 187

Re: Before I break something...

First off, you won't damage the RPi with low voltage...it will just quit and require a reboot...but voltages in excess of 5.25V may damage it irreparably. The 1000maH battery won't keep the RPi alive for very long so you would need to upgrade considerably if your power outages last. Even a headless ...
by wh7qq
Sat Aug 29, 2020 7:48 pm
Forum: General discussion
Topic: attaching a small spectrometer sensor HAT designed for a RPI3 to a RPI4
Replies: 2
Views: 171

Re: First Time with Raspberry Pi, Need Expert Help

A simple approach: Both the Neospectra and the RPi have SPI support so a RPi 0W and a direct connection to the spec would do the trick. This eliminates the need for the Sixfab board and all that is needed is a program to put the data into a .csv file and output it to the net/cloud. Perhaps another R...
by wh7qq
Sat Aug 29, 2020 7:17 pm
Forum: General discussion
Topic: NOOBS - is it really for noobies?
Replies: 18
Views: 872

Re: NOOBS - is it really for noobies?

There have been many posts on this forum caused by noobies using Noobs. Maybe it's user error but if it's so easy to screw up, why call it Noobs and show it as a stand-alone operating system which it is not. Simply downloading and extracting one of the supported full OS zip files solves a lot of pro...
by wh7qq
Sat Aug 29, 2020 7:00 pm
Forum: General discussion
Topic: Lightning strike shorted my 3.3 V line
Replies: 15
Views: 601

Re: Lightning strike shorted my 3.3 V line

So there is a solution: Put a vacuum tube buffer amplifier as the front end to your inputs :) Good that he included a "smilie" at the end of his post. Cheapest fix is just to have a backup RPi and uSD card ready to go. No engineering or wiring required...just put it in a drawer until needed or the ...
by wh7qq
Sun Aug 16, 2020 4:53 pm
Forum: General discussion
Topic: Raspberry Pi4 8 gb not booting
Replies: 3
Views: 246

Re: Raspberry Pi4 8 gb not booting

1. Download a fresh copy of RaspiOS desktop from this web page and verify its sha256sum. Also download a fresh copy of "Etcher" (free to download and use), 2. Burn the downloaded file to a new, quality uSD card with 16 to 32 Gig, Class 10 or A1 from a top line house. It should be in a sealed package...

Go to advanced search