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by mikronauts
Thu Feb 28, 2019 6:44 pm
Forum: HATs and other add-ons
Topic: ADS1115-ADC Module for Raspberry PI 3 B+
Replies: 5
Views: 714

Re: ADS1115-ADC Module for Raspberry PI 3 B+

I would get a usb audio adapter with line level inputs. I have purchased a ADS1115-ADC Module for my Raspberry 3 B+ for audio streaming. I want to stream Line Level Audio from a mono PA amp. There are six screw terminals for the input GND, ANO, AN1, An2, AN3, 3V3. What two terminals do I use for the...
by mikronauts
Wed Feb 27, 2019 11:57 pm
Forum: Beginners
Topic: Wireless SSD storage?
Replies: 5
Views: 458

Re: Wireless SSD storage?

I wrote an article a couple of years ago on how to use a Pi as a NAS (and googling will find many more examples) https://www.mikronauts.com/raspberry-pi/raspberry-pi-2-nas-experiment-howto/ While a bit dated, it should point you in the right direction Wanting to set up a SSD equipped Pi 3B+ that I c...
by mikronauts
Tue Feb 12, 2019 9:00 pm
Forum: The MagPi
Topic: Proposal for a small robot controller based on RPi Zero
Replies: 8
Views: 1944

Re: Proposal for a small robot controller based on RPi Zero

When the pi0 was introduced, I quickly designed (and produced pcb's) for a Pi Zero form factor robotics hat that was FAR more feature full and powerful than what you are suggesting. I never brought it to market as the RPF is limiting pi0 sales to such an extent that I would lose a lot of money marke...
by mikronauts
Sat Jan 19, 2019 1:29 am
Forum: Troubleshooting
Topic: Any reason why a Pi 3 will not run from a 64 GB card?
Replies: 15
Views: 885

Re: Any reason why a Pi 3 will not run from a 64 GB card?

See if you can store 64Gb of data on it on a pc (formatted on a pc) As you say, it could be a defective card, or possibly a counterfeit card that has no where near 64Gb I am running several Pi's from 16 GB MicroSD cards. I am trying to set one up with a 64 GB card so I can include my mp3 collection ...
by mikronauts
Wed Jan 09, 2019 1:04 am
Forum: HATs and other add-ons
Topic: Case for both the Pi and a 2.5" HD/SSD?
Replies: 9
Views: 804

Re: Case for both the Pi and a 2.5" HD/SSD?

I've done some performance tests like that: https://www.mikronauts.com/raspberry-pi/raspberry-pi-2-usb-hard-drive-and-adapter-tests/ https://www.mikronauts.com/raspberry-pi/how-can-i-add-a-sata-hard-drive-to-a-raspberry-pi-2/ https://www.mikronauts.com/raspberry-pi/raspberry-pi-2-nas-experiment-howt...
by mikronauts
Wed Jan 09, 2019 12:55 am
Forum: Beginners
Topic: Simulating the Pi board GPIO
Replies: 10
Views: 825

Re: Simulating the Pi board GPIO

At the risk of appearing self serving, I tend to use https://www.mikronauts.com/wp-content/upload/2014/01/pi_jumper_schoolboard2.jpg For my simple Pi breadboard experiments (with various Pi models) And more complicated variations as well https://www.mikronauts.com/wp-content/upload/2015/11/pidev.jpg...
by mikronauts
Mon Jan 07, 2019 3:05 am
Forum: Automation, sensing and robotics
Topic: Announcing RoboPi advanced controller for the Raspberry Pi
Replies: 43
Views: 14031

Re: Announcing RoboPi advanced controller for the Raspberry Pi

I have started working on the next firmware revision, and I welcome suggestions for what additional software features you would like to see. With the eight core microcontroller on RoboPi I have some elbow room to play with :) Currently I am considering the following additions in the near future: 1) ...
by mikronauts
Wed Jan 02, 2019 2:03 pm
Forum: Beginners
Topic: Relay boards
Replies: 31
Views: 3297

Re: Relay boards

Fyi, The MCP23017 has 16 i/o pins, so only two are needed. Okay, I get a idea of what you want. What for kind of leds are we talking about. The standaard 5mm leds? So, in your current design you have 4*8 =32 outputs. And that's more than the Rpi can provide. This means that you need to add a i/o exp...
by mikronauts
Fri Dec 28, 2018 6:53 pm
Forum: General discussion
Topic: Kodi PVR
Replies: 11
Views: 1380

Re: Kodi PVR

You wrote tv in canada... I assumed you meant over the air atsc.

No idea on how to record streams.
thadaddyy wrote:
Fri Dec 28, 2018 6:35 pm
I'm getting TV via the internet. For HDhomerun is it best to use the hdhomerun pvr add on in Kodi?
by mikronauts
Fri Dec 28, 2018 4:18 pm
Forum: General discussion
Topic: Kodi PVR
Replies: 11
Views: 1380

Re: Kodi PVR

Hdhomerun + kodi should do it.
thadaddyy wrote:
Fri Dec 28, 2018 4:35 am
Hey guys, what is the best hardware/software combo to record live TV in Kodi? I'm in Canada and basically looking for PVR type function.
by mikronauts
Tue Dec 25, 2018 8:59 pm
Forum: HATs and other add-ons
Topic: Emulated eeprom ok for hats?
Replies: 4
Views: 493

Re: Emulated eeprom ok for hats?

Thanks ... it is always good to reduce BOM costs.
mahjongg wrote:
Tue Dec 25, 2018 8:45 pm
The POE HAT uses an emulated EEPROM, and also controls the fan with the same microcontroller.
by mikronauts
Tue Dec 25, 2018 8:31 pm
Forum: HATs and other add-ons
Topic: Emulated eeprom ok for hats?
Replies: 4
Views: 493

Re: Emulated eeprom ok for hats?

Thank you!
hippy wrote:
Tue Dec 25, 2018 7:14 pm
"this is fine as long as the Pi can't tell the difference!"

https://github.com/raspberrypi/hats/issues/43
by mikronauts
Tue Dec 25, 2018 7:05 pm
Forum: HATs and other add-ons
Topic: Emulated eeprom ok for hats?
Replies: 4
Views: 493

Emulated eeprom ok for hats?

Any objections from RPF to emulated (instead of physical) eeproms on hats?

(I am working on a new product and I am trying to minimize the parts count and BOM costs)
by mikronauts
Tue Dec 25, 2018 6:13 pm
Forum: Camera board
Topic: Creating a RPI-assisted microscope
Replies: 53
Views: 9565

Re: Creating a RPI-assisted microscope

REALLY nice work guys!

I will follow this thread and build my own for my smt work.
by mikronauts
Wed Dec 12, 2018 4:17 pm
Forum: Python
Topic: Reading PDM data @ 2MHz with Raspberry Pi + pigpio (Python)
Replies: 25
Views: 8803

Re: Reading PDM data @ 2MHz with Raspberry Pi + pigpio (Pyth

You are most welcome. HI, Thanks for response I shall try 4 bit one That is because those chips don't have them... I would use a 4 bit binary counter driven by the shit clock signal, look for a change on q3 (highest bit) which would indicate 8 clock pulses have been seen. Thank you very much for the...
by mikronauts
Tue Dec 11, 2018 5:30 pm
Forum: Python
Topic: Reading PDM data @ 2MHz with Raspberry Pi + pigpio (Python)
Replies: 25
Views: 8803

Re: Reading PDM data @ 2MHz with Raspberry Pi + pigpio (Pyth

That is because those chips don't have them... I would use a 4 bit binary counter driven by the shit clock signal, look for a change on q3 (highest bit) which would indicate 8 clock pulses have been seen. I would use a 74hc299 or 74hc595 (google for sample usage) Hello I am Vipin Please may I have t...
by mikronauts
Tue Dec 11, 2018 2:55 pm
Forum: Troubleshooting
Topic: About ADC and PWM
Replies: 2
Views: 194

Re: About ADC and PWM

If the hat uses an ADC chip, you can't reprogram it to get a pwm output. If the hat uses a microcontroller for analog input, then if the chip lets you change modes for the pin to pwm output, and the firmware supports it ... maybe, however if the manual does not say the hat can do that, forget it. Ju...
by mikronauts
Tue Dec 11, 2018 2:06 am
Forum: Automation, sensing and robotics
Topic: robot controller
Replies: 15
Views: 1011

Re: robot controller

One example: https://www.amazon.com/Venom-5000mAh-Battery-Universal-Traxxas/dp/B000VUF3O2 There is a hobby shop in your town https://www.yellowpages.com/peculiar-mo/mip/peculiar-game-530737830?lid=530737830 Took me 10sec to find via google I live in a little town you have never heard of known as har...
by mikronauts
Mon Dec 10, 2018 6:59 pm
Forum: Automation, sensing and robotics
Topic: robot controller
Replies: 15
Views: 1011

Re: robot controller

My friend, go to a local rc hobby shop, or google for 7.4v rc battery pack, 2ah :) I do drive by help posts here im my coffee breaks and when compiling code or flashing chips, I usually do not have time to also do the googling leg work for those I help. also maybe a link because I am new to this?
by mikronauts
Mon Dec 10, 2018 6:34 pm
Forum: Python
Topic: Reading PDM data @ 2MHz with Raspberry Pi + pigpio (Python)
Replies: 25
Views: 8803

Re: Reading PDM data @ 2MHz with Raspberry Pi + pigpio (Pyth

I would use a 74hc299 or 74hc595 (google for sample usage) Thank you for your response. I realize that it may not be possible to acquire a single bit @ 2MHz. But, if I use a 8-bit shift register, then I would have to acquire 8 bits or 1 byte every 2M/8 = 250kHz. A shift register also sends out a log...
by mikronauts
Mon Dec 10, 2018 6:32 pm
Forum: Automation, sensing and robotics
Topic: robot controller
Replies: 15
Views: 1011

Re: robot controller

Assuming 1A load while moving @ 7.4V, with two motors 2 * 1A * 0.5h is 1amp-hr capacity for an rc nimh or nicad 7.4v battery pack But, it is best to test this in real life, as it depends on weight of robot, surface you are on, speed and more. Btw, use a separate usb battery pack for the pi etc now a...
by mikronauts
Fri Dec 07, 2018 1:55 pm
Forum: Automation, sensing and robotics
Topic: robot controller
Replies: 15
Views: 1011

Re: robot controller

From chassis spec Rated Voltage: 6 V Operating Voltage Range 2~7.5V From driver board Voltage supply: DC 7 ~ 24 V Voltage supply limit: 6.5 ~ 27 V Note motor drivers drop 0.5v ... 1v from their supply voltage before "feeding" the motor However you can get any driver board as long as it can supply 2....
by mikronauts
Fri Dec 07, 2018 3:18 am
Forum: Automation, sensing and robotics
Topic: robot controller
Replies: 15
Views: 1011

Re: robot controller

Good looking chassis!

From their site, I would get

https://www.dfrobot.com/product-1534.html
Will5455 wrote:
Fri Dec 07, 2018 3:00 am
yep meant motor controller not rbot controller!

https://www.dfrobot.com/product-1477.html
this is the set of stuff
by mikronauts
Fri Dec 07, 2018 1:04 am
Forum: Automation, sensing and robotics
Topic: robot controller
Replies: 15
Views: 1011

Re: robot controller

Do you mean motor driver? PWM allows speed control with geared motors. Or do you mean stepper motors or servo's? You should also post the maximum current your motor may need. Please post a link to the motors web page. Does anybody know of a good robot controller capable of 6v with variable speed who...
by mikronauts
Thu Dec 06, 2018 5:48 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Long SPI distance problem with 2 Slaves.
Replies: 1
Views: 387

Re: Long SPI distance problem with 2 Slaves.

SPI is meant for short distances (examples: on the same pcb, or daughter board plugged into pcb) Sometimes (if running at a low enough data rate) you can abuse the spec and run faster, but you will be very susceptible to corrupted data due to electrical noise. Simplest solution for you is to use two...

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