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A longer message plotted by an old HP Deskjet 3325 printer hacked using an Arduino Duemilanove to control the DC motors.
"How can you make a shield to cover the reset button?" you might say, but I have hacked this NG for Diecimila functionality, and I no longer need to press the reset button!
So that Fergal could show people the circuit at various stages of completion, we had a webcam on a tripod he could use to project his Arduino onto the screen. Cheese is very handy.
You can also see the rather natty visual circuit representations provided by Oomlout for their kits (and one of their ARDX kits too) which we're basing our course on.
Didn't use it that much this time out, but it's handy to have (and looks fancy)
These are some pictures of the liquidware geoshield for the arduino. The source code and schematics are available at www.liquidware.com
I used my hot air rework station (thank you Sparkfun) and removed the failed FETs. I did some slight damage to a nearby screw terminal, but it still seems to work fine, just melted a bit.
Given that this board is just an arduino, I used the arduino relay "how-to" and rigged up a resistor and a PN2222 to a relay (and an identical relay in parallel, because the relays I had lying around were only rated for half the expected current of 2.67 A).
Of the four terminals to the FET package, one is direct to an AT168p "arduino" pin. Two go to the same single terminal on the top screw terminal. The other terminal being +12V. So basically the two pins are connected through the heating element to 12V.
The relay needs +5V too.
I pulled the GND (black) and 5V (red) off the FTDI header (via the back/bottom). And connected the arduino pin (purple)(via now vacant FET pad) to the 2222 (through the 1kOhm resistor). The other two pins of the 2222 connect the relay trigger and ground. The fourth wire (white) goes back to the vacant pad connecting to the screw terminal. That way I wasn't soldering the HBP to anything.
Maybe I should upload some pictures... this explanation is getting hard to follow.
I did make an error, though, deducing that the top "pin" of the FET package was ground. It is in fact the "load". Luckily this error didn't seem fatal, and didn't take long to debug with a meter and fix.
Rather than do this three times, I opted to do it once and switched the barrel heater to the one good FET (which will fail some day) and set the heated build platform to work through the relays.
RGB colour sensor data collected by Arduino Blend Micro. Data is sent to iPhone over Bluetooth Low-Energy.
Arduino Academy, a 3-day summer programme for students in New Zealand, 7-9 July 2014. Catalyst IT was the organizer.
After a rough start getting the laptops to recognize the Sparkfun boards, participants in the Arduino 101 class learned to flash LED's - the first step into the world of embedded electronics.
This plastic part fits a single Arduino microcontroller board to protect its bottom from short circuits. The Arduino clips in to the plastic shell by a small overhang on the top of the walls. The smooth curves and regular pattern of plastic lines created by melting a thin filament of material and squirting it on top of the previous layer makes for a design reminscent of a geological formation.
Pandora Music player project using a Raspberry Pi and an Arduino with a SainSmart keyboard display... almost ready for assembly...
Arduino with a distance sensor and LED. Arduino A/D read a value from a distance sensor, and write a value to LED port with PWM. When LED is bright, the distance is close.
These plushie steaks glow alternatingly, governed by an arduino board running pulse-width modulation software. I silkcreened the steak pattern myself!
Our fall Arduino 101 class at Tam Makers is off to a great start. I taught this evening course with my associates Donald Day and Edward Janne on September 14, 2016, at the woodshop in Tam High School in Mill Valley.
We welcomed a wonderful group of seven students, including adults with diverse backgrounds, as well as a high school student. We started by giving our students an overview of the popular Arduino board. We then learned how to light up an LED, add a button to turn it on and off, and play a sound with a piezzo buzzer.
Students accomplished all these steps successfully, and seemed to really enjoy this class and told us they learned a lot from it. We’re really happy that this course is going so well and we look forward to teaching next week’s class.
View more photos of this Arduino course:
www.flickr.com/photos/fabola/albums/72157659914570948
Learn more about this Arduino 101 class:
www.tammakers.org/arduino-101/
Read our Arduino 101 Guide:
bit.ly/arduino-101-guide-fall-2016
Check out our course slides:
bit.ly/arduino-101-slides-fall-2016
Learn more about Tam Makers: