Friday, February 12, 2016
Broken chinese made drill bit
A precautionary reminder to myself when using drills - almost hit my legs while drilling a metal and the bit broken apart. The broken edge is sharp and it got on my leg it will pierce mercilessly - but i was lucky enough. And for the record the drill bit is made china and it broke a brand new one - so despite of cheap better use a branded high quality drill bit in future to avoid such accident. This is heavy duty stuff and involve high risk - as there is no replacement for damaged body parts. Better be safe all the time then having an accident that may hurt yourself that last a life time.
One simple circuit to step up voltage using LM2577 -Adj P+ chip. The schematic is from Texas Instrument and it works expected - and below is...