Go to advanced search

by sommersoft
Wed Jul 15, 2015 5:10 pm
Forum: Astro Pi
Topic: So we were nominated for an Arthur award!
Replies: 3
Views: 1011

Re: So we were nominated for an Arthur award!

Congratulations on your nomination! As you say, it is no small feat.

While I doubt accolades are a major driving force behind why you all do this, the recognition is definitely rewarding I'm sure.
by sommersoft
Tue Jul 14, 2015 9:08 pm
Forum: Advanced users
Topic: spidev vs bitbanging
Replies: 6
Views: 1743

Re: spidev vs bitbanging

The Python spidev module uses the underlying Linux SPI driver. The Linux SPI driver on the Pi supports the main SPI peripheral which has two slave selects. There is another SPI peripheral on recent Pis which is currently not supported by the Linux SPI driver. This auxiliary peripheral has three sla...
by sommersoft
Tue Jul 14, 2015 7:53 pm
Forum: Advanced users
Topic: spidev vs bitbanging
Replies: 6
Views: 1743

Re: spidev vs bitbanging

Well, that thread doesn't discuss spidev specifically, but I think it is sort of implied since the "context" covers two protocols (SPI and i2c). They seem to be discussing native MCU communication vs software communication; which as I understand would be spidev vs bit banging when discussing only SP...
by sommersoft
Tue Jul 14, 2015 5:25 pm
Forum: Beginners
Topic: RC Car - what to use to send signals?
Replies: 7
Views: 1009

Re: RC Car - what to use to send signals?

XBee popped in my head right from the jump. Being Pi noobish, can't speak to implementation...

https://www.sparkfun.com/categories/222

And it would appear I'm set to follow mikronauts around today. hahaha
by sommersoft
Tue Jul 14, 2015 4:53 pm
Forum: Beginners
Topic: SPI bit banging; MCP3208; Raspberry;error
Replies: 5
Views: 1439

Re: SPI bit banging; MCP3208; Raspberry;error

5. ....since I am operating at 1Mhz. MCP3208 datasheet shows 1MHz as the minimum CLK @ Vdd2.7V, and gives Note 3: "Because the sample cap will eventually lose charge, effective clock rates below 10 kHz can affect linearity performance, particularly at elevated temperatures. See Section 6.2 “Maintai...
by sommersoft
Tue Jul 14, 2015 4:09 pm
Forum: Automation, sensing and robotics
Topic: MCP3008 faulty or is it because of SPI?
Replies: 8
Views: 2017

Re: MCP3008 faulty or is it because of SPI?

I have just downloaded and installed (doceme) spidev and I am getting the same error. Perhaps something else is broken. The errors being reported do not seem to make any sense. e.g. Traceback (most recent call last): File "./trimpot.py", line 21, in <module> print read() File "./trimpot.py", line 1...
by sommersoft
Tue Jul 14, 2015 4:57 am
Forum: Other projects
Topic: Automotive Gauges and Controls
Replies: 5
Views: 2971

Re: Automotive Gauges and Controls

Totally doable. I'm working on a similar, albeit newer car, display system. I was doing it with a Parallax Propeller, but now I'm on a Pi. To read analog sensors (typically read by 0-5V signals) you'll need an Analog-to-Digital Converter (ADC). The MCP3XXX series are popular (I'm using the MCP3208, ...
by sommersoft
Tue Jul 14, 2015 4:16 am
Forum: Other projects
Topic: This Machine Kills
Replies: 4
Views: 1261

Re: This Machine Kills

Very nicely done, for a very bleak subject. Not to dwell too much on the aesthetics, mind telling us what components you used? I believe I recognize quite a bit of aircraft electrical cable, and I assume since you posted on this board...a Pi. I applaud your work on the hardware work. All by hand, or...
by sommersoft
Tue Jul 14, 2015 4:06 am
Forum: Other projects
Topic: STICKY: The projects list. Look here for some ideas.
Replies: 233
Views: 389714

Re: The projects list. Look here for some ideas.

Finally made the jump over to RPi, after an accidental shorting of my Parallax Propeller. Figured I'd just bring my plans along with me. 1. Auto sensor display (I know, 'ol tired project). Pure analog sensor driven to allow aftermarket sensors, but now with RPi I might make it modular to be able to ...
by sommersoft
Tue Jul 14, 2015 3:29 am
Forum: General programming discussion
Topic: RPi as car ECU?
Replies: 33
Views: 35474

Re: RPi as car ECU?

In an effort to not be negative, this is about all I can offer... 1. Run your AFRs "pig rich" to keep detonation at bay. Hell, I'd stay as close to 15 as I could. Basically, stay on the safe side of Speed Density calculations. 2. Run only in closed loop; don't allow learning based upon environment (...

Go to advanced search