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Getting Started with E-Textiles: Basic Circuit with a PCB LED



my name is Julie Boyd and this is an e-text I'll shoot hit Roenick this tutorial show circuit using a PCB led PCB led is one where the LED is mounted onto the board and we can see on the board there is a negative marking and a positive marking so that makes it an easy easier LED to use to create a circuit I join the negative on my led to the negative on my cell holder and the positive on the other side of my led to the positive on the other side of my cell holder we're going to use a specialist conductive thread to join the LED and the cell holder together you can see that the cell holder has four rings on it so here on this side we need one positive and one negative to create our circuit that means for this particular circuit we're just going to use the the two rings on this side of the cell holder if I'm creating a product where I don't need to use these other two rings then I can just hold those down with ordinary sewing thread just to stabilize them so here I have my my cell holder my LED and my conductive thread ready to start my circuit take a look at the separate tutorials on how to choose a needle how to thread your needle how to do the stitches to create the circuit and how to start and finish your stitching we can start stitching with other our LED or our cell hold with the key thing is that the negative on our LED is going to be matching up to the negative that is on the cell holder I'm going to start by stitching my LED I can start with either side of the LED I tend to start by always stitching the negative side of the LED first and simply because if I do my negatives first it makes things easier for some of the things I might do later on so it's just a good habit to get into so I'm bringing my needle up in the back of my fabric I've got a knot tied in the end of my thread and I'm going to do an over sewing stitch it's a separate tutorial on how to do this if you're not sure so doing five or six over sewing stitches into the fabric and just a key point here is the over sewing stitches need to be nice and tight as you stitch them however science issues are complete I'm now going to do some running stitches again see the separate tutorial on how to do this if you're not sure and I'm doing running stitches down to where my cell holder is going to be so in my case it's just going to be down the opposite end I'm going to stitch the negative side of my cell holder so again with an over sewing stitch again nice and tight and again about five or six of them all together and I've completed my over sewing stitches I'm just going to finish off the stitches on the back and then I'm going to cut the threads very close to the stitches that I've created the first side of the circuit is now complete so I'm now going to join the positive LED and the positive side of the cell holder I'm going to use a new piece of thread to stick to the positive side of the circuit my circuit is now complete just notice that when you are designing your circuits you mustn't have your positive and negative sides of your circuit crossing over each other or going near each other where they might accidentally touch to complete our circuit we're going to need to put a cell into the cell holder so just make sure that you touch it on either side rather than touching it on the top and the bottom of the cell holder because that could short it out and the shiny side flat side so it is compared to the side and with a plus sign on it slides into the cell holder and your LED is then powered and will come on

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