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Step 5Electrolytic Capacitors
We have four parts left, so let's get half of them done in one go.
First is the two electrolytic capacitors. These are the two dark colored metal cans. One has '10uF' written on the side in small letters and is usually larger than the other. The other capacitor has '0.47uF' written on the side in small letters. Make sure you know for sure which of the two is the 10uF capacitor, and which is the 0.47uF (470nF) capacitor.
With these two capacitors, it is possible to put them in backwards, and you don't want to do that. Of the two legs, one is 'positive', the other is 'negative', and there are a couple of different ways to know which one is which.
First, there is a grey stripe on the side of the cannisters. The pin closest to this stripe is the negative one.
Second, one leg is longer than the other. The longer leg is the positive leg, and the shorter leg is negative. You'll notice on both capacitors that the shorter leg is closest to the grey stripe.
Now that you know which leg is which, let's put them in place. Grab the bigger capacitor marked 10uF. Locate the spot labelled 'C3' and '10uF' on the board. Inside the circle is a small plus sign '+'; that tells you which leg is positive. Put the longer, positive leg through the hole with the '+', and the negative through the other hole. Push the capacitor all of the way through. Bend the legs outward to hold it in place. We're going to put the other capacitor in before we solder the legs down.
Grab the capacitor marked 0.47uF. Locate the spot labelled 'C2' and '470nF' on the board. Again, one hole is marked with a '+', so put the longer positive leg through there, and the negative leg through the other hole. Pull the capacitor through all of the way and bend the legs to hold it in place.
Flip the board over. We're about to solder the legs in place, but let's take one last moment to verify we're putting the capacitors in properly. The pads the legs are sticking through should have one square pad, and one round or octagonal pad. The longer (positive) leg should be going through the square pad. If the longer leg of each capacitor is going through a square pad, you have it in properly. Solder the legs to the pads and trim them short with a wire cutter.
First is the two electrolytic capacitors. These are the two dark colored metal cans. One has '10uF' written on the side in small letters and is usually larger than the other. The other capacitor has '0.47uF' written on the side in small letters. Make sure you know for sure which of the two is the 10uF capacitor, and which is the 0.47uF (470nF) capacitor.
With these two capacitors, it is possible to put them in backwards, and you don't want to do that. Of the two legs, one is 'positive', the other is 'negative', and there are a couple of different ways to know which one is which.
First, there is a grey stripe on the side of the cannisters. The pin closest to this stripe is the negative one.
Second, one leg is longer than the other. The longer leg is the positive leg, and the shorter leg is negative. You'll notice on both capacitors that the shorter leg is closest to the grey stripe.
Now that you know which leg is which, let's put them in place. Grab the bigger capacitor marked 10uF. Locate the spot labelled 'C3' and '10uF' on the board. Inside the circle is a small plus sign '+'; that tells you which leg is positive. Put the longer, positive leg through the hole with the '+', and the negative through the other hole. Push the capacitor all of the way through. Bend the legs outward to hold it in place. We're going to put the other capacitor in before we solder the legs down.
Grab the capacitor marked 0.47uF. Locate the spot labelled 'C2' and '470nF' on the board. Again, one hole is marked with a '+', so put the longer positive leg through there, and the negative leg through the other hole. Pull the capacitor through all of the way and bend the legs to hold it in place.
Flip the board over. We're about to solder the legs in place, but let's take one last moment to verify we're putting the capacitors in properly. The pads the legs are sticking through should have one square pad, and one round or octagonal pad. The longer (positive) leg should be going through the square pad. If the longer leg of each capacitor is going through a square pad, you have it in properly. Solder the legs to the pads and trim them short with a wire cutter.
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