Hi everyone,
I'm currently attempting to build a plasma speaker using a 555 timer, an IRFS654 MOSFET, a lead acid battery, and a flyback; from what I gather it's not an uncommon procedure.
My problem is that the frequency coming out of the flyback doesn't seem to match the 555's frequency. I scoped the 555 pin 3 as being 25 kHz, which is well beyond audible, but when I attempt to create an arc it makes a nasty tone approximately that of nails on a chalkboard, and the plasma arc is erratic and jumps about. Also, as I change the distance of the spark gap, the frequency changes audibly, growing lower as the distance is increased and higher as the distance is decreased. I have tried this with both 20 and 10 turns on the primary and got the same result, with the 10 turn's providing more voltage, but the same effect.
Does anyone know where I might be going wrong?
I can post a pic/video of my setup if anyone thinks it will help.
Thanks in advance
I'm currently attempting to build a plasma speaker using a 555 timer, an IRFS654 MOSFET, a lead acid battery, and a flyback; from what I gather it's not an uncommon procedure.
My problem is that the frequency coming out of the flyback doesn't seem to match the 555's frequency. I scoped the 555 pin 3 as being 25 kHz, which is well beyond audible, but when I attempt to create an arc it makes a nasty tone approximately that of nails on a chalkboard, and the plasma arc is erratic and jumps about. Also, as I change the distance of the spark gap, the frequency changes audibly, growing lower as the distance is increased and higher as the distance is decreased. I have tried this with both 20 and 10 turns on the primary and got the same result, with the 10 turn's providing more voltage, but the same effect.
Does anyone know where I might be going wrong?
I can post a pic/video of my setup if anyone thinks it will help.
Thanks in advance