DC to AC inverter with the 555

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iambrus
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DC to AC inverter with the 555

Post by iambrus » Thu Dec 18, 2003 2:43 am

Hello there, I found an interesting DC/AC converter design for 50HZ 220V.
http://www.uoguelph.ca/~antoon/circ/555dcac.html<p>I was almost very happy until I read the description. There is R4 potmeter which is supposed to regulate frequency. Without an oscilloscope how can figure out what frequesncy I have? I guess there is no way.

bridgen
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Re: DC to AC inverter with the 555

Post by bridgen » Thu Dec 18, 2003 4:29 am

You could power a record turntable, assuming it has a synchronous motor, and adjust the frequency until the reproduced audio sounds right.

iambrus
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Re: DC to AC inverter with the 555

Post by iambrus » Thu Dec 18, 2003 4:40 am

Thank you David, I went through the circuit and realised that I only need to leave out R4 in order to get a fix 50Hz frequency.

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