Table for Electronic Dreams
Intro: Table for Electronic Dreams
Table for Electronic Dreams is a table which reveals the hidden electrical activity of nearby electronic objects. Through this interaction, people will develop a greater awareness of the invisible workings of their electronic devices and the limits of human perception.
STEP 1: Gather Parts!
You will need:
PARTS LIST
15 circuit boards
15 LM324 quad op amp
15 14-pin sockets
60 white LEDs
60 induction coils*
* Currently I am using coils from Digikey part number M10013-ND. The inductance is 4.7mH. They do not look like the ones pictured in this instructable.
60 10 ohm resistors
60 10M ohm resistors
60 1K ohm resistors
30 100K ohm resistors
15 10 μF capacitors
60 0.1 μF capacitors
You could change these numbers if you want to make a smaller table. There will be 1 quad op amp, 4 LEDs and 4 induction coils for each board.
For the table:
1/4 inch translucent white acrylic 33" x 21"
1/4 inch clear acrylic 33" x 21"
aluminum u-channel
For op amps I am using a quad op amp LM324, but you can use any op amp chip.
PARTS LIST
15 circuit boards
15 LM324 quad op amp
15 14-pin sockets
60 white LEDs
60 induction coils*
* Currently I am using coils from Digikey part number M10013-ND. The inductance is 4.7mH. They do not look like the ones pictured in this instructable.
60 10 ohm resistors
60 10M ohm resistors
60 1K ohm resistors
30 100K ohm resistors
15 10 μF capacitors
60 0.1 μF capacitors
You could change these numbers if you want to make a smaller table. There will be 1 quad op amp, 4 LEDs and 4 induction coils for each board.
For the table:
1/4 inch translucent white acrylic 33" x 21"
1/4 inch clear acrylic 33" x 21"
aluminum u-channel
For op amps I am using a quad op amp LM324, but you can use any op amp chip.
STEP 2: Plan Circuit
Follow the schematic and connect the components properly.
You can do this on a perfboard or a printed circuit board if you want to be fancier. I am selling printed circuit boards , please see my website for details on ordering boards.
Essentially the coil picks up a voltage, which is amplified by the op amp, which drives an LED.
I have placed the coil next to the LED so there is more of a one-to-one correspondence between detected field strength and LED brightness.
See a legible version of the circuit diagram here: http://andydoro.com/table/images/circuit.gif
You can do this on a perfboard or a printed circuit board if you want to be fancier. I am selling printed circuit boards , please see my website for details on ordering boards.
Essentially the coil picks up a voltage, which is amplified by the op amp, which drives an LED.
I have placed the coil next to the LED so there is more of a one-to-one correspondence between detected field strength and LED brightness.
See a legible version of the circuit diagram here: http://andydoro.com/table/images/circuit.gif
STEP 3: Assemble Circuit
Assemble components onto a printed circuit board.
You can also use perf board.
The board should run on between 3 to 5 V DC current. Use a voltage regulator (7805 or 3940) in order to get a steady voltage.
You can also use perf board.
The board should run on between 3 to 5 V DC current. Use a voltage regulator (7805 or 3940) in order to get a steady voltage.
STEP 4: Test the Board
Oh look, it's working!
STEP 5: Repeat!
You can keep making circuit boards!
STEP 6: Mount Circuit Boards
I mounted the circuit boards to some transparent acrylic.
I placed the boards so that the LEDs are in a 3 inch pitch grid.
You can then connect the powers and grounds of each of the boards together with some wire.
I placed the boards so that the LEDs are in a 3 inch pitch grid.
You can then connect the powers and grounds of each of the boards together with some wire.
STEP 7: Test the Circuits
You can test the circuits' responsiveness to electronic devices.
I used a cellphone, but it works best if the cellphone is in use. You can try calling a friend or checking your voicemail.
I used a cellphone, but it works best if the cellphone is in use. You can try calling a friend or checking your voicemail.
STEP 8: Build Table
You can install these circuits into an existing table, or build your own.
Actually, it doesn't have to be a table at all...
Actually, it doesn't have to be a table at all...
STEP 9: Finishing Touch
Now you can place a sheet of translucent white acrylic above the layer of circuits to diffuse the light from the LEDs.
I used small white vinyl bumpers for the acrylic to sits on top of.
I used small white vinyl bumpers for the acrylic to sits on top of.
122 Comments
shwetha.reddy.5680 9 years ago
How do I rectify the problem of LEDS always on ???
gandini43 10 years ago
gandini43 10 years ago
mbenavides 10 years ago
ChristoVanEeden 10 years ago
marcinek__85 14 years ago
Sorry for my English.
pranav vempati 12 years ago
snoopdogg416 14 years ago
thanks
DMcC 14 years ago
thexplanet 14 years ago
Thanks for pointing out regarding the 3-cm wire in lieu of 4.7mH inductance coil,
however, can you please share the snap /picture of your bread board setup for this,
as I want to make this, and i am not that good into electronics, and i see this is dual sided PCB.
so, i would like to test it on bread-board first.
Thanks in advance.
DMcC 14 years ago
Unfortunately I have moved home since I played around with this circuit (back in June 2009) and dont have ready access to the breadboard.
I would recommend that you set up the circuit a replace the coil with a short section of wire and see if that works for you. My son and I discovered that a short section of wire worked quite well as a replacement for the coil.
good luch
D McC
thexplanet 14 years ago
I did the entire re-design of this ckt, and got it working for an Inductor with 4.7uH
can you explain which mode is the LM324N is working in? or why is it only LM324N? being used.
Is it RF / Microwave or EM?
Thanks
pranav vempati 12 years ago
snoopdogg416 14 years ago
DMcC 14 years ago
http://www.altronics.com.au/index.asp?area=item&id=L8260
http://www.altronics.com.au/index.asp?area=item&id=L6230
But as mentioned in my last post I don't believe it really matters what coil you use as we also had success with using 3 cm of wire in place of the coil.
If you set up a test circuit on a bread board you will see for yourself that the coil rating is not important.
All the best
D McC
pranav vempati 12 years ago
nimit1994 12 years ago
ilpug 12 years ago
mr panerai 13 years ago
all email are welcome sekutu@hotmail.com / tomz_eternity@yahaoo.com
andydoro 12 years ago