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by hzrnbgy
Sat Mar 17, 2012 3:46 pm
Forum: General discussion
Topic: Will the rPi drive down the prices of systems with embedded devices?
Replies: 20
Views: 6750

Re: Will the rPi drive down the prices of systems with embedded devices?

washing machines, ovens, coffee maker, etc are the domains of the 8 bit MCUs and cortex-M0. unless they are going to incorporate Ethernet communication, advanced image processing, etc, there is no point in using an overly powered and substantially more complex processor to do the basics
by hzrnbgy
Sat Mar 17, 2012 1:27 pm
Forum: Other projects
Topic: CAN Interface
Replies: 103
Views: 109671

Re: CAN Interface

Most GPS receivers have built in RTC backup that requires a standard coin cell battery to work.
by hzrnbgy
Fri Mar 16, 2012 11:53 am
Forum: Other projects
Topic: CAN Interface
Replies: 103
Views: 109671

Re: CAN Interface

If you have GPS, you already have extremely accurate timing source
by hzrnbgy
Fri Mar 16, 2012 9:41 am
Forum: Off topic discussion
Topic: Ordered something else to fill the time
Replies: 65
Views: 17383

Re: Ordered something else to fill the time

I already have the PandaBoard but way too expensive for the one I'm building. Just need a basic web+ mysql + php server which the RPi should be more than capable of
by hzrnbgy
Fri Mar 16, 2012 9:35 am
Forum: Other projects
Topic: Arduino-like custom breakout board
Replies: 21
Views: 8777

Re: Arduino-like custom breakout board

haha, missed that one.

that's my limit with SMD. I tried 0.5mm pitch Cortex-M0 (cheap ones, just in case) but failed miserably. That's why I stick with the more expensive but bigger 0.8mm xmega tqfp
by hzrnbgy
Fri Mar 16, 2012 9:27 am
Forum: Automation, sensing and robotics
Topic: Greenhouse Automation
Replies: 15
Views: 10670

Re: Greenhouse Automation

<t>I had been working on this kind of project for a while.  I already made some custom wireless boards and expansion board for the Pandaboard. It should be easy to port to the RPi as both talks via serial only, no fancy driver needed.<br/> <br/> Here's a screenshot of the Pandaboard with the wireles...
by hzrnbgy
Fri Mar 16, 2012 8:46 am
Forum: Other projects
Topic: Arduino-like custom breakout board
Replies: 21
Views: 8777

Re: Arduino-like custom breakout board

<t>how'd you like soldering 0806 SMD components?<br/> <br/> <br/> <br/> I have a couple of extra boards for the RPi I built with:<br/> <br/> GPS header<br/> <br/> 32KB external SRAM<br/> <br/> 32MHz xmega processor<br/> <br/> standard bluetooth header (the ones you buy off ebay)<br/> <br/> HI-power ...
by hzrnbgy
Fri Mar 16, 2012 8:36 am
Forum: Other projects
Topic: Using Iphone to control R Pi, via same NetWork
Replies: 36
Views: 17139

Re: Using Iphone to control R Pi, via same NetWork

I had built an android app to control stuff in my home



Though I have a Pandaboard instead of a RPi. The good thing is, my custom wireless expansion board talks to the Pandaboard via serial which makes its extremely easy to port over RPi
by hzrnbgy
Fri Mar 16, 2012 8:32 am
Forum: Other projects
Topic: Case Design - Teaser
Replies: 16
Views: 10277

Re: Case Design - Teaser

i'll buy ten
by hzrnbgy
Sun Mar 11, 2012 6:19 am
Forum: Other projects
Topic: How about a car entertainment system with built-in engine car management system?
Replies: 10
Views: 4757

Re: How about a car entertainment system with built-in engine car management system?

just finished soldering my GPS add-on for the RPi











Some preliminary driver installed (SERIAL COMM and GPS)

by hzrnbgy
Sun Mar 04, 2012 2:54 am
Forum: Other projects
Topic: Car Computer?
Replies: 55
Views: 84970

Re: Car Computer?

hot from iteadstudio, GPS add-on for the RPi



by hzrnbgy
Sun Mar 04, 2012 2:43 am
Forum: Other projects
Topic: CAN Interface
Replies: 103
Views: 109671

Re: CAN Interface

<r>IanW said: <br/> <br/> <br/> There are quite a few Bluetooth CAN Bus interfaces available, I"m not too sure how effective they are but might be one avenue to explore? The typical price is around £20 for an ODBII device - Much less than I could build one for.<br/> <br/> I created a CAN interface f...
by hzrnbgy
Sun Feb 26, 2012 12:27 am
Forum: Other projects
Topic: Concept for a case
Replies: 121
Views: 74991

Re: Concept for a case

I want three!!!
by hzrnbgy
Thu Feb 16, 2012 7:00 pm
Forum: Other projects
Topic: Weather Station
Replies: 25
Views: 14577

Re: Weather Station

<t>I'd go with a custom built board so you can put all those that you need. It will also look better than stitching a bunch of sensors. It may also end up cheaper if you know where to look for components.<br/> <br/> I built my own expansion board for the RPi and it will cost me a total of $70 bucks ...
by hzrnbgy
Tue Feb 14, 2012 3:18 am
Forum: General discussion
Topic: GPIO Programming Question
Replies: 59
Views: 25936

Re: GPIO Programming Question

<t>The only problem is that the typical Arduino mcu (AVR atmega) runs at 5V but the RPi at 3V3. You would need a level converter. But yes, you can connect them via serial, SPI, i2c, bit banged parallel bus, etc. It all depends on how you intend to make the two communicate, master-slave, master-maste...
by hzrnbgy
Mon Feb 13, 2012 7:34 am
Forum: Other projects
Topic: qudrocopter UAV drone
Replies: 30
Views: 21300

Re: qudrocopter UAV drone

<t>I wouldn't suggest using an RPi for a UAV primarily due to its weight, size and power requirement. As far as performance goes, it may have the grunt to do all sorts of computation but for a control system, latency and response is more critical than brute force.<br/> <br/> An arduino mini/pro shou...
by hzrnbgy
Mon Feb 13, 2012 2:52 am
Forum: Other projects
Topic: GPIO Header Pinout Clarification
Replies: 31
Views: 14743

Re: GPIO Header Pinout Clarification

I just had a prototype expansion header manufactured. Im only interested with the SPI, UART, GND, 5V0, and 3V3 pins, are these pins still on the correct location as far as what Liz said on the first post?
by hzrnbgy
Sat Feb 11, 2012 10:03 am
Forum: Automation, sensing and robotics
Topic: 1wire using GPIO?
Replies: 8
Views: 17149

Re: 1wire using GPIO?

<t>I was just finishing my DS18B20 (temperature sensor) driver for an 8-bit microcontroller.<br/> <br/> The timing requirements for these 1-wire devices are somehow harder to implement in a full blown OS like Linux. You would be better off having a separate controller (an 8 bit MCU) that talks to th...
by hzrnbgy
Sat Feb 11, 2012 12:20 am
Forum: General discussion
Topic: RPi expansion header...
Replies: 11
Views: 4192

Re: RPi expansion header...

<t>I just sent this over to Iteadstudio for prototyping. Im getting 10 of these board in the next few weeks. Im not going to use all of them so if you are interested, let me know.<br/> <br/> The cost with everything populated should be around $60<br/> <br/> GPS<br/> <br/> 2 x 1W LEDs<br/> <br/> blue...
by hzrnbgy
Mon Feb 06, 2012 8:36 pm
Forum: General discussion
Topic: RPi expansion header...
Replies: 11
Views: 4192

Re: RPi expansion header...

<t>The 5V0 pin would probably end up as a power input to the RPi.<br/> <br/> <br/> It has been mentioned that the 3.3V current output at the expansion header is 50mA.<br/> <br/> <br/> 50mA is too low for my application. The GPS alone needs around 80mA. Looks like everything will be powered from the ...
by hzrnbgy
Sun Feb 05, 2012 6:46 pm
Forum: General discussion
Topic: RPi expansion header...
Replies: 11
Views: 4192

Re: RPi expansion header...

<t>Good to know. Then I can connect the regulator's 5V output to the RPi and power it from there.<br/> <br/> Just a couple more question and I'm good to go<br/> <br/> What is the current rating of the built-in 3V3 regulator?<br/> <br/> At what logic level does the RPi IO pins operate at, 5V or 3V3?<...
by hzrnbgy
Sun Feb 05, 2012 5:24 am
Forum: General discussion
Topic: RPi expansion header...
Replies: 11
Views: 4192

Re: RPi expansion header...

<t><br/> <br/> Here is what I have so far<br/> <br/> GPS module (serial, connected to xmega mcu)<br/> <br/> back-up coin cell<br/> <br/> RN-42 (bluetooth, not connected yet)<br/> <br/> transistor array (connected to GPIO0~5, up to 500ma drive)<br/> <br/> 2 x 1W Cree MX3 LEDs (dimmable via PWM thru x...
by hzrnbgy
Sun Feb 05, 2012 12:06 am
Forum: General discussion
Topic: RPi expansion header...
Replies: 11
Views: 4192

Re: RPi expansion header...

<t>I found these on-site and I was just wondering how accurate these are. I'm currently building an expansion board for the Pi and I want to make sure I have it right.<br/> <br/> Another thing, are the 5V0 and 3V3 outputs or power inputs? And what logic level does the IO pins operate, 5V or 3.3V?<br...
by hzrnbgy
Thu Feb 02, 2012 2:58 am
Forum: Other projects
Topic: Suggestion: Tiny PCB for DC-anything to 5 V DC
Replies: 50
Views: 17630

Re: Suggestion: Tiny PCB for DC-anything to 5 V DC

<r>save yourself the trouble of designing your our switching regulator<br/> <br/> Mouser has one with max 1.5A output with minimum efficiency of 89% at 12V input. Includes the necessary protection circuitry and has the same footprint as a T0-220 package.And it only cost $4 (shipping not included).<b...
by hzrnbgy
Mon Jan 30, 2012 10:07 pm
Forum: Other projects
Topic: PWM as a voltage regulator
Replies: 33
Views: 16508

Re: PWM as a voltage regulator

<r>may I suggest a DC-DC switching buck module with all the components built in. Its a direct replacement for your regular inefficient 78XXX linear voltage regulator.<br/> <br/> all you need to connect is voltage in, ground, and voltage out and it cost only around $5. It also has built-in protection...

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