ATTENTION! Self-powered Sine to Square wave Converter. Converts sine to square waves without a power-source, as all other schemes are located on the sites of their rightful owners. We are not liable for the contents of other sites as well as the site having a circuit Self-powered Sine to Square wave Converter. Converts sine to square waves without a power-source. Pressing the button you must get onto a page with Self-powered Sine to Square wave Converter. Converts sine to square waves without a power-source.