Some of them have driver issues on Windows though (as they use clone chips) - if you have the money, try and buy a branded one like Adafruit or Sparkfun, or use one that definitely mentions FTDI.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I'd check volts first.
Also, what were you doing when it got bricked? I guess it wasn't just sitting there doing nothing - it might help figure out what the problem is.
Any converter should work. I use these ones: http://www.ebay.co.uk/itm/CP2102-USB-2-0-to-TTL-UART-Module-5Pin-Serial-Convertor-STC-Replace-FT232-Module-/262448073893?hash=item3d1b1fcca5:g:ATcAAOSw9NdXrLfe
Some of them have driver issues on Windows though (as they use clone chips) - if you have the money, try and buy a branded one like Adafruit or Sparkfun, or use one that definitely mentions FTDI.
instructions here: http://www.espruino.com/Serial+Bootloader