Monday, June 27, 2011
How to open HTC desire HD battery cover
It maybe sounds easy but if you never tried it can be very difficult. The problem is we just don’t know how the cover clip structure is like. The conventional way to open common mobile phone battery cover is by sliding it down but unfortunately for HTC Desire HD don’t work that way. Simply sliding it to the side won’t work or possibly break the clip it is you try too hard. HTC provided a hint by creating small gap where you can slip in your finger nail and lift the cover open. Refer to the screen shot below how to do it.
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...