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I know everyone has done this before. RFID and arduino that is. But looking at the example code it looks like the antenna is always in receive mode. I am not sure how this affects the life of the chip / reader but I thought of adding a way to detect human presence before activating the receiver.
I found some little IR heat detector (here: www.allelectronics.com/make-a-store/item/IRD-10/INFRARED-... and tossed together some analog read code and viola. Now when the IR detector detects over a certain variable heat temp it activates the RFID reader.
I will post the code and write up on my blog.
This is a fully Arduino-compatible setup based on the Arduino breadboard except with a USB to serial converter and an RS232 level shifter instead of the FTDI chip. I used the parallel cable I'd made previously to burn the bootloader, then I was able to program it and to communicate with it via USB. This was all done using the normal Arduino software on Linux.
Our third Arduino 101 class at Tam Makers went really well. I taught this evening course with co-instructor Donald Day on Thursdays, from June 16 to 30, 2016, at the woodshop in Tam High School in Mill Valley.
We worked with an enthusiastic group of seven students, including adults with diverse backgrounds, as well as a couple high school students. Our partner Geo Monley worked both as a mentor and as a student during the hands-on sessions.
We started the class at 6pm, by giving students an overview of how circuits work. We then learned how to use a multimeter, how to solder electronics, and how to control rainbow-colored NeoPixel lights.
Students seemed to really enjoy this class and told us they learned a lot from it. Several expressed an interest in taking intermediate and advanced classes in the future. This is one of our first maker courses at Tam Makers, and we’re really happy that it is going so well; we look forward to teaching more classes in the fall.
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-june-2016
Check out our course slides:
bit.ly/arduino-101-slides-june-2016
Learn more about Tam Makers:
Wow, could not be simpler. Sonar unit streams the distance continuously on an analog line. 3 Wires, vcc, gnd, A0.
I bought this very cool book from the Computer History Museum, that's the KENBAK-1.
This is an Arduino-based emulation of the KENBAK-1, considered by some to be the first "personal computer". It was first advertised for sale in the September 1971 issue of Scientific American (forty years ago!).
See the set.
See the videos.
Get the Arduino sketch from here.
An add-on Gilroy’s been toying with for everybody’s favorite Arduino enclosure, this makes it simple to change out a 9V battery when your project needs the base & lid to stay together.
Few lightings taken with my 30D and the arduino lightnig trigger.. still mounted on the Breadboard :) ..
Part of my plan to make a low-power wifi-enabled magnetometer for AuroraWatch UK. This shield is designed for Calunium, but will work with full functionality on the Arduino Mega2560. It will also operate on a standard Arduino but flow control and some of the GPIO features of the RN-XV are not available.
The shield uses logic level translators on both the inputs and the output from the SD card. This means it can be safely used in situations where there are 5V devices on the SPI bus (eg MicroMag3), see blog.stevemarple.co.uk/2011/10/interfacing-33v-devices-to... for a discussion of the problem.
Eagle design files are available under CC BY-SA 3.0 licence at github.com/stevemarple/RNXV_SD_shield.
This is something I had been meaning to complete for quite a while. I needed something that was portable, clean and easy to store random things in to prototype stuff on the fly.
The Proto Desk allows me to sit on the couch with my laptop and arduino and mess around.
$9 ARDUINO lesson 2. I copied the code from the web site but had to add the int definitions. push the button and light the LED!
An Arduino Expermentation kit with Circuit 5 installed (how to use a Shift Register).
Like more details? Visit the Instructable:
www.instructables.com/id/EN90SWTFRD89IBH/
Interested in purchasing a full Arduino Expermentation kit?
In the UK visit:
www.oomlout.co.uk/arduino-experimentation-kit-ardx-p-183....
In the US / Rest of the World:
Bearing, Distance and ETA to a Way-point
The bearing can be shown either as cardinal directions or in degrees, and can be shown as relative or absolute in respect to true north.
The ETA can be based on either the current or the average speed of travel.
More information and source code available at: www.seancarney.ca/projects/arduino-gps-receiver/arduino-g...
$9 ARDUINO lesson 2. I copied the code from the web site but had to add the int definitions. push the button and light the LED!
Built after this schematic: www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1206874649/8 - I only added two capacitors to buffer off voltage spikes when inserting the card as described here: elm-chan.org/docs/mmc/mmc_e.html
The SD-Card slot I had un-soldered from an old cheap digital camera.
This is something I had been meaning to complete for quite a while. I needed something that was portable, clean and easy to store random things in to prototype stuff on the fly.
The Proto Desk allows me to sit on the couch with my laptop and arduino and mess around.
This is something I had been meaning to complete for quite a while. I needed something that was portable, clean and easy to store random things in to prototype stuff on the fly.
The Proto Desk allows me to sit on the couch with my laptop and arduino and mess around.
This is something I had been meaning to complete for quite a while. I needed something that was portable, clean and easy to store random things in to prototype stuff on the fly.
The Proto Desk allows me to sit on the couch with my laptop and arduino and mess around.
This is something I had been meaning to complete for quite a while. I needed somThis is something I had been meaning to complete for quite a while. I needed something that was portable, clean and easy to store random things in to prototype stuff on the fly.
The Proto Desk allows me to sit on the couch with my laptop and arduino and mess around.
ething that was portable, clean and easy to store random things in to prototype stuff on the fly.
The Proto Desk allows me to sit on the couch with my laptop and arduino and mess around.
My Arduino Synthesizer. Inspired by an article on Make (hooray for make!). It has an interface built in Processing to control the frequency and waveform.
check out my blog post for more information, the source code, and some videos.