Search found 15 matches

by mdAndy
Thu Aug 15, 2013 5:47 pm
Forum: Sensors
Topic: 3-axis accererometer MMA7361
Replies: 1
Views: 6130

3-axis accererometer MMA7361

@Paul Badger

3-axis accererometer MMA7361

What are the final "units of measurement" of the MMA7361 in the demo program?
I am just a novice.
tiltx = atan2( sqrt((y*y) + (z*z)), x);
tilty = atan2( sqrt((x*x) + (z*z)), y);
tiltz = atan2( sqrt((y*y) + (x*x)), z);
by mdAndy
Sun May 08, 2011 9:27 pm
Forum: JeeNode and Wireless
Topic: JeeNode 915 kits
Replies: 5
Views: 8845

Re: JeeNode 915 kits

No biggie? All the information, I have seen shows straight headers and I expected straight headers.
I paid for straight headers. :evil:
by mdAndy
Fri May 06, 2011 7:22 pm
Forum: JeeNode and Wireless
Topic: JeeNode 915 kits
Replies: 5
Views: 8845

JeeNode 915 kits

I bought two JeeNode 915 kits V5 and for the qty 4 6 pin female I/O headers they had
right angle connectors. They should be straight. (both kits)
Any reason why? :o
by mdAndy
Wed Mar 30, 2011 8:29 pm
Forum: Sensors
Topic: Sharp (AMBI) vs the Vishay Temt6000 Sparkfun
Replies: 5
Views: 9558

Sharp (AMBI) vs the Vishay Temt6000 Sparkfun

The MD Sharp ambient light sensor (AMBI) vs the Vishay Temt6000 (Sparkfun) In searching for the best light sensor for my OpenPicus Flyport Wifi Webserver Garage Door Controller, I used the Vishay Temt6000 until I found the Modern Device Sharp ambient light sensor (AMBI). There is no comparison - the...
by mdAndy
Tue Sep 29, 2009 8:21 pm
Forum: Development
Topic: New Development Board Suggestion: "USB BUB BBB"
Replies: 6
Views: 9664

Re: New Development Board Suggestion: "USB BUB BBB"

The whole idea of the BBB is to separate the seldom used USB circuitry from the always used microcontroller. Maybe for your "stand alone" applications. For others, like me, having the PC tied to the BBB constantly via USB BUB suits me fine. That is why I suggested to have the circuit already built ...
by mdAndy
Tue Sep 29, 2009 2:05 pm
Forum: Development
Topic: New Development Board Suggestion: "USB BUB BBB"
Replies: 6
Views: 9664

New Development Board Suggestion: "USB BUB BBB"

New Development Board Suggestion: "USB BUB BBB" There are many times that having just an BBB board with USB built in is all a person needs. The power draw of a 328P idle is 25 ma and the USB max. current is 100 ma. On your BBB board do the following: #1. Remove all power supply options. #2. Add your...
by mdAndy
Sun Sep 06, 2009 8:31 am
Forum: BBB
Topic: Crystal insulator for BBB
Replies: 1
Views: 8561

Crystal insulator for BBB

For those who install the crystal on their BBB ...
Other than elevating the crystal off the board (to prevent shorts)
you could get a mylar insulator for the crystal via Digikey
Bivar crystal insulator for HC-49U crystal type
part #492-1039-ND
:ugeek: :ugeek: :ugeek:
by mdAndy
Thu Jul 23, 2009 8:15 pm
Forum: BBB
Topic: How to easily solder surface mount components on the BBB
Replies: 3
Views: 11634

Re: How to easily solder surface mount components on the BBB

Your tac adhesive should work well on the larger inductor but not the crystal caps.
You might also need a headmount optical magnifier to even see the miniature caps.
:ugeek: :ugeek: :ugeek:
by mdAndy
Sun Jul 19, 2009 4:26 pm
Forum: Development
Topic: BUB Board Static Protection
Replies: 3
Views: 7777

BUB Board Static Protection

Would it or could it be possible to find a "clear" heat shrink sleeve to encase the BUB board from shorting out and static electricity?
The end user would just slip the "clear heat shrink" tubing over the BUB after his configuration.
:ugeek: :ugeek: :ugeek:
by mdAndy
Sun Jul 19, 2009 11:04 am
Forum: BBB
Topic: How to easily solder surface mount components on the BBB
Replies: 3
Views: 11634

How to easily solder surface mount components on the BBB

Used for surface mount inductor and crystal caps Items needed: Super glue - fast drying. tweezer toothpicks Steps: #1 Put super glue in a plactic holding cap or throw away container. #2. Poke the superglue with the toothpick to transfer the glue to the PCB. #3. Put a very, very, very, very, small am...
by mdAndy
Sat Aug 02, 2008 6:46 am
Forum: Exhibition
Topic: Modicon Modbus RTU Slave protocol comes to the Arduino/Freed
Replies: 8
Views: 37959

Re: Modicon Modbus RTU Slave protocol comes to the Arduino/Freed

It's really any device that has digital inputs, digital outputs, analog inputs, analog outputs, a comport for communications, memory for program storage and a CPU for processing control instructions. The ATMega168/Arduino/Freeduino fits this description. With the Modbus RTU networking protocol you c...
by mdAndy
Thu Jul 31, 2008 4:56 pm
Forum: Exhibition
Topic: Modicon Modbus RTU Slave protocol comes to the Arduino/Freed
Replies: 8
Views: 37959

Modicon Modbus RTU Slave protocol comes to the Arduino/Freed

The functions codes have been reduced to only two (Function codes 3 and 6). This industrial PLC networking protocol will allow multiple Slaves (Arduinos/Freeduinos) to be connected to one Master via RS485. You can also use it "point to point" using RS232. Error checking is provided by a CRC16 data c...
by mdAndy
Fri Jul 18, 2008 6:36 pm
Forum: Development
Topic: RBBB with ATMega328p ?
Replies: 4
Views: 9630

Re: RBBB with ATMega328p ?

mdAndy wrote:The Atmel AVR ATMeaga168p is a 28 pin device with 16K flash 1K Ram 1/2K EEProm.
The Atmel AVR ATMeaga328p is a 28 pin device with 32K flash 2K Ram 1K EEProm.
How about it? :mrgreen: :mrgreen: :mrgreen:
by mdAndy
Fri Jul 18, 2008 6:32 pm
Forum: Development
Topic: RBBB with ATMega328p ?
Replies: 4
Views: 9630

Re: RBBB with ATMega328p ?

Paul, it is the second chip I am talking about - The first chip goes on your standard RBBB and is the ATMega168p chip.
The second chip has "double the resources" of your Freeduino chip.
by mdAndy
Fri Jul 18, 2008 6:33 am
Forum: Development
Topic: RBBB with ATMega328p ?
Replies: 4
Views: 9630

RBBB with ATMega328p ?

The Atmel AVR ATMeaga128p is a 28 pin device with 16K flash 1K Ram 1/2K EEProm.
The Atmel AVR ATMeaga328p is a 28 pin device with 32K flash 2K Ram 1K EEProm.
How about it? :mrgreen: :mrgreen: :mrgreen: