For the cup speaker it will look something like this. It is now time to attach the diaphragm to the frame of the speaker. You can use an electric drill or for safety you may wish to use a reamer. This will require making a hole in the cup or bottle cap. The magnet is held in place with a wire tie. This straw will go through the bottle cap or the bottom of the drink cup depending on the device you wish to make. A strong magnet will be held in place by a second straw. The next step is to make the magnet support. The final voice coil should look something like this with the glue flanges on the outside and the coil extending into the cup or bottle. On the left is a paper diaphragm and a drinking cup lid is shown on the right. It is necessary to cutback the triangular flaps that close around the straw in a normal lid. In the image shown below, the coil has been inserted through the center hole of a drink lid. Make a hole in the diaphragm that will be a tight fit for the straw. The wire for the coil should be on the outside surface of the diaphragm as shown. The diaphragm can be any flexible material such as paper, a rubber glove, or a cup lid. Now we can connect the coil to a diaphragm. Then use hot glue to connect the tabs to the diaphragm material as shown below These split ends form tabs to connect the coil to the diaphragm.
We will also split the straw so that it looks as shown below. Try to wrap uniformly. Once the coil is completely wound cut off the remaining straw so that the edge of the coil is near one end of the straw and there is about 1-2 in of straw at the opposite end. You will need several layers and always wrap in the same direction. You can use a little nail polish on each layer to keep the coil from unwinding. A thin coating of nail polish is applied to hold the wire in place. The length should be 1/2 -3/4 of the magnet length. Make a guide mark so you know how long to make the coil. About the length of the pencil should be long enough. You will need to make connections to the voice coil so leave long leads. I like to position the straw on a pencil and hold the wires in place with painter’s tape. Once you know the resistance for 1m you can use a simple proportion to determine the required length. The lead resistance might be on the order of 0.5 Ohms and this could lead to an error in the length required. You should always check the zero on your multimeter first. To determine the length required, measure out 1.0m of wire and determine the electrical resistance of the wire. You will need to wrap several meters around the straw.
#Should i use soda player free
The coil must be free to move over the magnet so the inner diameter of the straw must be a little larger than the magnet. I often use #32 wire wrapped around a drinking straw. Older adults will not notice the loss in high frequency responsse. Above 15kHz the indcutive contribution would double the impedance of this speaker. That if you wind the coil based on the resistance you should be close enough at low frequencies. (Z) is that it includes the resistance (R), inductive reactance( XL) andįor my computer speaker replacements I constructed Sodaīottle Speakers with the following electrical properties at a frequency
#Should i use soda player portable
You can use it with you tablet, mp3 player or other portable devices. This amplified speaker can now be plugged into any headphone jack without causing an impedance mismatch. That way I only hear the left speaker (Cup). I have also clipped a lead from the right speaker in the amplifier housing. The Cup Speaker replaces my normal left speaker. As you can see, I have use Soda Cup speaker to replace one of my amplified computer speakers.
If you have a set of amplified computer speakers, you can use a Soda Bottle or Cup speaker to replace the actual speaker inside of the housing. If you want to drive the Soda Bottle speaker from a headphone jack, it is best to use an amplifier. Head phones are very high impedance devices and the You can find the impedance marked on the back of the speaker.ĭo not try to connect a low impedance speaker to the Speakers are 4 Ohms and I built Soda Bottle replacementsįor them. Stereo speakers are often 8 Ohms, but you might find 4, 8or 16 Ohm speakers in audio systems. Physics Home Marone Home Parts List Introduction Experiments
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