Cockroft-Walton Multiplier can output positive or negative voltage
(HackaDay) If you’ve already dipped your toes into high-voltage power supply pool you may be thirsty for a bit more knowledge. Here’s a neat illustration of how to build a voltage multiplier that can output a positive or negative supply. It is based
Update update feed set failed_fetches=0, fetched=current_timestamp() where feed_id = 3433 failed: 1142 [UPDATE command denied to user '334187_hdlns_ms5'@'10.187.248.89' for table 'feed'] in [update feed set failed_fetches=0, fetched=current_timestamp() where feed_id = 3433]
updated 3433 (Hack a Day), inserted 15, updated 0, at 2012-05-30 20:22:32
