A visual alarm device includes a flash tube that provides a visual indication responsive to trigger a signal. A strobe circuit is coupled between the flash tube and a power source and causes a flash tube to emit light at a desired flash rate. The strobe circuit includes a storage circuit, an in-rush...http://www.google.fr/patents/US6556132?utm_source=gb-gplus-shareBrevet US6556132 - Strobe circuit
