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Well today’s project update Part 3 is going to be about the circuit and the building of it. First we must start with all the parts that we bought and we will be placing them into the breadboard, pictures of everything will be below as always, this way we can make sure that the circuit does what we want before we wire up everything.
Now before I move forward the picture of the breadboard above is what we used to create the prototype of the circuit that we are building. We actually made 3 versions of the circuit the first one we made was with a capacitor with a rating of 1µF this produced a very fast blinking led that really didn’t look very spooky. The 2nd video we used a 47µF capacitor we wanted to use a 50µF but they didn’t have them so the closest was the 47µF capacitor. Finally the 3rd video we created was with a 100µF capacitor this is the one we used because it created the best blink because of the time it took to charge the cap and the timer that we used produced a really random blink sometimes long sometimes short.
Here is the 1µF Video.
(WARNING: The light blinks very fast so this could make you sick or possible seizures.)
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Here is the 47µF Video
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Last but not least the 100μF Video
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Now that I have shown you the Videos of what we are going to do let me show you what we picked up from Radioshack. You saw the list in the previous Halloween Project Parts the only change we had was we picked up a 100μF Capacitor to get rid of the 1μF Capacitor that was used for the start. I will let the pictures show you everything we got.
Now we start to assemble the circuit on the perfboard this is the long process as it took me 2 hours to think of the layout that I am going to use to minimize the amount of wire, waste, solder, and size. We want this to be a small circuit because it is going to be placed into something and also to minimize how much wire we will need to glue down and route. Also after all the soldering is done make sure to use hot glue to make sure that if anything contacts it the current will not travel and short the circuit.
Lets start First thing we need to do is figure out a layout we are going to use this is one of the layouts i tried before I soldered everything into the board. As you will see this layout was part of the final design but not exactly the one we used and that is due to the fact as I went along I needed to change the circuit to fit and move heat to different area’s and not bridge solder points.
Now we are going to start with putting the 555 Timer into the board and solder in the chip.
After we got that into place I solder in at the top the Positive and Ground wire on the board. After I then needed to solder Pin 1 on the 555 Timer to the ground and then pin 4 to pin 8 as you see in the next picture.
After that we get more detailed by connecting up the rest of the Circuit, the Resistors are now connected together and the capacitor along with the rest more of the connections to the 555 Timer and you can see this is starting to get a bit tricky. Also we connected the positive lead for the Capacitors at the bottom of the board so we can make sure there is room for that connection.
Here is what the top of the whole circuit looks like we want it to look as nice as possible and not cluttered like the bottom is.
Now we flip it back over and solder the capacitor to the ground along with the Pin 3 to the LED. More wires and getting cluttered but trying to keep everything as close and clean. Just need to connect Pin 8 to the Positive power connection and we will have a running circuit as the LED’s are already connected up.
Now we connect the positive connection to Pin 8 and everything should light up and blink like it did on our breadboard.
Now the LED Test! Note the LED in the first picture it does light up but due to the flash it doesn’t show well but you can see a little light in the left led more than the right. The 2nd Photo shows them in the off state and the last picture shows how I connected the power source for the test the final version will have a on off switch.
Tomorrow’s post will show the circuit getting placed into the Creeper head and the Connecting of the Power Switch. Tomorrow’s post will have a full break down of everything that we used and a cost from Radioshack.