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by Schorschi
Sun Jun 02, 2019 6:16 pm
Forum: General discussion
Topic: Reading Infra-red reflective paint?
Replies: 0
Views: 113

Reading Infra-red reflective paint?

I have an idea for how to tell if a disc is turning via a Raspberry Pi. I figured if I paint the disc sections with infra-red reflective paint, and as the disc turns I can count the number of the times an infra-red receiver senses the painted sections pass in front of the sensor. Has anyone tried so...
by Schorschi
Fri May 31, 2019 3:46 am
Forum: General discussion
Topic: Is there a way to reset the status returned by vcgencmd get_throttled?
Replies: 10
Views: 606

Is there a way to reset the status returned by vcgencmd get_throttled?

I suspect I know the answer, but asking just the same... Is there a way to reset the status returned by vcgencmd get_throttled? Short of an explicit reboot? I have some automation scripting that monitors the various 'warnings' that are returned by vcgencmd get_throttled. After I have captured the st...
by Schorschi
Mon May 06, 2019 12:05 am
Forum: General discussion
Topic: Monitor raspberry pi boot sequence with ESP module?
Replies: 0
Views: 119

Monitor raspberry pi boot sequence with ESP module?

Anyone working on using an ESP8266 or ESP32 to monitor Raspberry Pi boot sequence? It would seem that this should be possible, using the TX RX on the ESP module cross linked to the TX RX UART on the Raspberry Pi? Anyone interesting on working on this idea with me if no one has done it yet? I have a ...
by Schorschi
Sun May 05, 2019 11:25 pm
Forum: General discussion
Topic: PEN and RUN Pins, Proper Use?
Replies: 2
Views: 300

PEN and RUN Pins, Proper Use?

Do I have this right: PEN when shorted to GND will wake up Pi that is in a halt (or former shutdown state)? RUN when shorted to GND does a safe reset of the Pi? Safe as in SD card corruption is not an issue? Read quite a bit of information on this, and the many different references, none seems offic...
by Schorschi
Sun Apr 28, 2019 3:00 am
Forum: Advanced users
Topic: Using AD7705 ADC Module SPI (TM7705)?
Replies: 1
Views: 793

Re: Using AD7705 ADC Module SPI (TM7705)?

Bump... looking for the same example. How to use the AD7705 ADC module with a Raspberry Pi.
by Schorschi
Mon Apr 15, 2019 3:47 am
Forum: Advanced users
Topic: Relay Breakout Module with Opto-Isolation is uln2003a needed?
Replies: 2
Views: 233

Relay Breakout Module with Opto-Isolation is uln2003a needed?

When using a relay breakout module with Opto-Isolation is an uln2003a needed? I am also using a GPIO expansion module driven by i2C, i.e. a PCF8475 module, and the relay can be low or high triggered (nice feature to have), so I don't see any benefit to using an uln2003a between the PCF8475 and the r...
by Schorschi
Thu Apr 11, 2019 8:20 pm
Forum: General discussion
Topic: TLS update
Replies: 5
Views: 1690

Re: TLS update

Disable of TLS 1.0 and 1.1 in wpa supplicant configuration breaks many wireless configurations, so just stating that the client side in the OS does not solve the issue or explain the issues involved. If you update wpa supplicant right now in Raspbian, and you follow the directions per the current pa...
by Schorschi
Tue Apr 02, 2019 1:40 am
Forum: Advanced users
Topic: To much of a good thing? Using a AMS1117-3.3 regulator?
Replies: 2
Views: 349

To much of a good thing? Using a AMS1117-3.3 regulator?

To much of a good thing? Using a AMS1117-3.3 regulator? I have a DC fan that is rated for 12v, but I am only feeding the fan 5v from a separate power supply. I have been monitoring the voltage from the tachometer pin, and it varies from about 1.7 volts to zero. It never seems to go above 1.7 volts a...
by Schorschi
Wed Mar 20, 2019 3:23 am
Forum: Advanced users
Topic: Why is or are PCF857x IO expansion modules always low trigger for output?
Replies: 2
Views: 192

Why is or are PCF857x IO expansion modules always low trigger for output?

Why is or are PCF857x IO expansion modules always low trigger for output? I have got several different types of PCF857x modules and relays, and I was trying to find a combination of low relay open, high relay close, to avoid creating NPN circuit complexity, to invert the low/high logic, but it appea...
by Schorschi
Tue Mar 19, 2019 12:46 am
Forum: Automation, sensing and robotics
Topic: Software implementation of HT12E encoder
Replies: 6
Views: 2831

Re: Software implementation of HT12E encoder

Any more work on this? I would love to great a project to emulate HT-12E encoding and with 303.875 Mhz SAW to create a RF remote control transmitter.
by Schorschi
Wed Feb 13, 2019 9:24 pm
Forum: Troubleshooting
Topic: Run python script as cgi under apache2 server[my experience]
Replies: 10
Views: 18487

Re: Run python script as cgi under apache2 server[my experience]

Nice, simple, straight forward. I did not have any issues, worked just fine. Thanks.
by Schorschi
Tue Feb 12, 2019 4:34 am
Forum: Troubleshooting
Topic: Can't connect to wifi but wifi country has been set properly (Pi 3 Model B+)
Replies: 37
Views: 24132

Re: Can't connect to wifi but wifi country has been set properly (Pi 3 Model B+)

Has anyone found a fix for this? This is driving me nuts. Pretty much makes using wifi on my new Pi useless. Is the Pi design team not aware of this issue?
by Schorschi
Fri Feb 08, 2019 3:16 am
Forum: Raspbian
Topic: Odd i2c bus behavior after the latest distribution update?
Replies: 2
Views: 278

Re: Odd i2c bus behavior after the latest distribution update?

No one has seen this behavior? I have seen it happen once again on a 3rd device, different than the two referenced above. So this is not unique, and really does point to a software issue of some type with the kernel/firmware as noted.
by Schorschi
Mon Jan 21, 2019 11:21 pm
Forum: Raspbian
Topic: Odd i2c bus behavior after the latest distribution update?
Replies: 2
Views: 278

Odd i2c bus behavior after the latest distribution update?

Anyone notice any odd i2c bus behavior after the latest distribution update? I have several Pi devices around the house, doing various things, from network services, to indoor weather, i.e. custom thermostat logic, etc. About once a month I update the distribution on each Pi, just to keep things co...
by Schorschi
Mon Jan 21, 2019 12:20 am
Forum: Advanced users
Topic: Reset i2c bus?
Replies: 1
Views: 1021

Reset i2c bus?

I have found that once in a while the i2c bus goes blind, or at least the master device, reports no devices found. Whereas a simple reboot clears the i2c bus, and devices appear once again. Reading various sources via Google I came across two ideas to avoid a reboot to clear the i2c bus. Each is sum...
by Schorschi
Sun Nov 11, 2018 2:43 pm
Forum: General discussion
Topic: Weird micro SD card failures?
Replies: 3
Views: 421

Weird micro SD card failures?

I have 4 PiZero based projects. House automation stuff and such. I routinely update the OS, make sure the kernel is up to date, etc. Been using Pi devices since 2012 or so. Thus, I am quite familiar with the devices, the Raspbian OS, micro SD cards, etc. Over the years I have add one or two SSD card...
by Schorschi
Sun Sep 02, 2018 3:51 pm
Forum: Beginners
Topic: Windows 7, win32diskimager not working!
Replies: 64
Views: 121214

Re: Windows 10, win32diskimager not working!

Can't write image to SD card with Win32 Disk Imager 1.0 on Windows 10. This was working a month ago, now it is not working, so might be a recent Windows 10 update that is impacting this? Can't seem to get any way to write to SD card with Win32 Disk Imager now on Windows 10.
by Schorschi
Mon Jul 23, 2018 2:56 pm
Forum: General discussion
Topic: Wifi adapter that actually works out of the box
Replies: 9
Views: 2079

Re: Wifi adapter that actually works out of the box

I have had the opposite results with the RTL chips. The USB dongles overheat, they fail often, and even when working they disconnect often. Reload of the drivers does not consistently solve the issues, full reboot often required. What I am looking for is a wifi dongle for RPi that works, consistentl...
by Schorschi
Sun May 13, 2018 12:57 am
Forum: General discussion
Topic: Radio Modules Getting Random Noise?
Replies: 3
Views: 415

Radio Modules Getting Random Noise?

Radio Modules Getting Random Noise? I have a pair of the following https://www.ebay.com/itm/315Mhz-RF-transmitter-and-receiver-kit-Module-ARMMCU-Raspberry-Pi-Arduino/181924555488?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D50962%26meid%3D0df8c110ea93414796853c8efacd51d4%26pid%3D100675%...
by Schorschi
Sun May 06, 2018 6:48 am
Forum: General discussion
Topic: Determine if ceiling fan is moving from 2 or 3 meters away?
Replies: 5
Views: 630

Determine if ceiling fan is moving from 2 or 3 meters away?

Working on home automation project, and need a non-intrusive method to determine if ceiling fan is moving from 2 or 3 meters away? This is a validation test scenario. I have a remote emulator that controls the fan, but the fan control system provides no feedback, no ACK or NACK if you will. Ideas co...
by Schorschi
Fri May 04, 2018 4:11 pm
Forum: General discussion
Topic: Driving a single WS2811/WS2812 SMD, not a strip
Replies: 8
Views: 1217

Re: Driving a single WS2811/WS2812 SMD, not a strip

I contacted the vendor to confirm as well, how they did their demo, they used an Arduino. So I grabbed the Adafruit NeoPixel library as well for Arduino. Using my brand new Arduino driving the 8 pixel stick, works with GRB, and 800KHz. As do the FC-100 labelled single SMD 5050s, I had purchased rece...
by Schorschi
Fri May 04, 2018 3:57 pm
Forum: General discussion
Topic: Pi Warranty?
Replies: 17
Views: 13083

Re: Pi Warranty?

Adafruit has the 30 day policy.
by Schorschi
Thu May 03, 2018 7:20 pm
Forum: Beginners
Topic: PIR sensor always high
Replies: 21
Views: 11106

Re: PIR sensor always high

When these PIR sensors fail, at least for me, they just generate HIGH states often and randomly. I have had 3 of these toys, and unfortunately 2 of the 3 have failed after only moderate use, 10s of hours of activated time, I would say. The last one is starting to behave oddly now as well at times. I...
by Schorschi
Mon Apr 30, 2018 7:44 pm
Forum: Advanced users
Topic: Using OpenNI2 or OpenCV to find human in room?
Replies: 3
Views: 381

Using OpenNI2 or OpenCV to find human in room?

Not sure if this is the right forum? But ignoring that issue, does anyone have an example or can point me in right direction on how to use OpenNI2 and/or OpenCV to do a simple true or false validation, is there a human, or body in a room? This has to be more than motion detection, since it needs to ...
by Schorschi
Sun Apr 29, 2018 9:39 pm
Forum: General discussion
Topic: Pi Warranty?
Replies: 17
Views: 13083

Re: Pi Warranty?

WARNING, do not ever purchase a Raspberry Pi from any reseller but Element 14. Why do I suggest this? Because it appears that Element 14 has the most extensive and customer friendly return policy. I recently had a Pi start overheating, a Pi that was only about 2 months old. I never overclock or such...

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