Selecting correct capacitor types? (EL Inverter Circuit) Answered
I recently purchased a simple EL kit consisting of a 4x AAA battery inverter and 2metre length of wire. The inverter itself is very noisy but I expected this having read product reviews online etc. I'm not certain whether this happens because of the natural characteristics of the high frequency circuit or maybe a result of low quality components. I heard someone mention that poor quality coil windings on the transformer only make things worse...
In any case, I am now looking to build my own inverter circuit with higher quality components.
From what I understand, a 555 timer IC simulates an alternating current and then a 1:10 output transformer produces the high voltage that the EL wire requires.
- The higher the voltage, the brighter the wire but a too powerful inverter decreases lifetime.
- The frequency determines colour (noticeable in natural phosphor blue/green EL wire).
I'm looking at replicating this circuit from makezine:
I was wondering if anyone could point me in the right direction regarding which type of capacitors I should use? e.g electrolytic / ceramic etc.