Print PDF
Favorite
Email
Step 4Creating Components
You can create a line stencil by cutting a 1/8" or wider slot in a piece of cardboard and painting in the slot. To create resistors you should first test your mix between two wires taped an inch apart. Let it dry overnight before you measure the resistance. Even when slightly wet, the resistance will be higher. To create a resistor I use a mix of 1/2 graphite to 1 liquid glue or of 1 to 1. To increase the resistance add less graphite to the mix or make the line less wide or thinner or longer.
See fig-B. To create a strain gauge (a resistor that varies resistance as it is bent), you can lay down a coat of liquid tape on a piece of flexible plastic. When it is partially dry lay down a coat of conductive glue between two wires or pieces of conductive thread that are about an inch apart. After that has dried, lay another coat of liquid tape over the whole thing. The strain gauge in the picture has a resistance between 70-300k ohms as it is slightly bent.
The strain gauge or a glued resistor can also be used as a temperature sensor. If it is taken from the shade into the full sun, the resistance increases. So, it could be used to measure the difference between room temperature and overheating conditions.
To glue two wires together, if you can, you should first twist or crimp them together and then coat them all the way around with conductive glue. If you merely lay them side by side without touching and then glue them, the resistance of the glue joint will be in 7-9 ohm range. See fig-A if you are using conductive thread (resistance is about 2 ohms per inch) for wires, you can tie an overhand knot to the wire you are connecting to and then coat all around it with the glue.
In fig-C you can see that it is also possible to glue surface mount LEDs.
See fig-B. To create a strain gauge (a resistor that varies resistance as it is bent), you can lay down a coat of liquid tape on a piece of flexible plastic. When it is partially dry lay down a coat of conductive glue between two wires or pieces of conductive thread that are about an inch apart. After that has dried, lay another coat of liquid tape over the whole thing. The strain gauge in the picture has a resistance between 70-300k ohms as it is slightly bent.
The strain gauge or a glued resistor can also be used as a temperature sensor. If it is taken from the shade into the full sun, the resistance increases. So, it could be used to measure the difference between room temperature and overheating conditions.
To glue two wires together, if you can, you should first twist or crimp them together and then coat them all the way around with conductive glue. If you merely lay them side by side without touching and then glue them, the resistance of the glue joint will be in 7-9 ohm range. See fig-A if you are using conductive thread (resistance is about 2 ohms per inch) for wires, you can tie an overhand knot to the wire you are connecting to and then coat all around it with the glue.
In fig-C you can see that it is also possible to glue surface mount LEDs.
| « Previous Step | Download PDFView All Steps | Next Step » |
5
comments
|
Add Comment
|
5
Sep 24, 2011. 12:03 PM
violentorchid
says:
violentorchid
says:
What are you using for this circuit, where is you diagram? Interesting instructable, but it could use a little more explanation. However, if you have included these things, they are so buried in words it's nearly impossible to find them. ie: clarification, please!
Reply
Jul 15, 2007. 1:40 PMdannydutton
says:
What is "A" for?
Reply
Jan 5, 2010. 1:16 AMadnimo
says:
probably a decade counter or similar linear device with a built in oscillator.
Reply
Sep 11, 2011. 12:51 PMSlightlyToastedButDead
says:
Oh wait it's a picaxe...
Reply
Sep 11, 2011. 12:49 PMSlightlyToastedButDead
says:
Definitely not a decade counter because it only has 8 pins. But pretty sure your right on the latter.
Reply
 |
Add Comment
|
