Monday, 2 September 2013
-=( Tip of the day #1 - Evil Heater Cartridges )=-
Don't ever take it for granted that the $4 ceramic heater cartridge is electrically isolated from it's stainless steel shell, always buy them in multiples and test them first before using them,
if your thermistor isn't as insulated as it should be or you are using multiple cartridges in a bed like i am for instance you will find it can generate a dead short, and if you run cheap power supplies like i do then you can either damage the board or blow up the power supply,
needless to say all the cartridges i now sell are tested before sale.