Instructables

The Plasma Speaker

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Step 7: Build the circuit

After you have tested to make sure everything is working, start building the prototype onto the veroboard.

If you notice in the pictures, I use an 16 pin socket for the TL494, it is really good idea to use sockets for the IC' s because you won't risk heat damage from soldering, and if the IC fails, you can easily replace it instead of desoldering it and solder another one in..
I also added an LED indicator, that is a good idea to add that on too, so you know whether the circuit is on or off. The LED indicator is connected to the TL494's power supply line.

After you had done soldering, make sure you made nice shiny solder joints and they are no solder bridges. If you think it is all good enough, add some dab of hot glue onto the loose components and wires for strain relief.
 
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Never_Quit3 years ago
If you add two separate Schottky diodes from the two audio output leads from ground, you can prevent voltage spikes to your audio device.
jaapiyo5 years ago
how much gonna cost it ?
iacon505 years ago
Hey, I have it mostly assembled but im having somed issues. mostly because its been a while since i've done circuit theory. do you have any more clear pictures of the actual circuit and how you built it? i must not be reading the diagram correctly. either in pc board or breadboard mode. mine is turning out a lot more complex than the pictures im seeing.
Plasmana (author)  iacon505 years ago
The plasma speaker is harder than it looks... Unfortunately, I do not have my plasma speaker available to take more picture of, I have taken it apart because it has an unknown problem that I cannot find or fix.
iacon505 years ago
hey, what is that one piece that you added to the board to connect the tl494 chip to the breadboard? the tl494 chip is very tiny and i was just wondering where you get that adapter or how you are supposed to work with it in the breadboard or soldering the circuit because its so tiny.