June 5, 2016, 9:27 pm
After taking the SMART UF-55 projector apart, I decided to take a look at the salvaged circuit boards to see whether I could re-use them to power the projector discharge lamp. Most of the modern projectors utilizes some kind of “smart” ballast circuits so that the main board could communicate with the ballast to determine the correct drive level given the required luminous level and monitor the operating temperature. Continue reading ‘Hacking an OSRAM P-VIP Projector Lamp Driver Board’ »
March 19, 2016, 2:25 pm
In my previous post, I did a review of the 6000 counts ennoLogic eM860T true RMS multimeter. This meter is based on a signal chip design using the versatile DTM0660L DMM chip. Besides the ennoLogic eM860T, several other multimeters such as UNI-T 139C, Velleman DV4100, Tekpower TP40 etc. are also based on the same chip. Continue reading ‘Hacking DTM0660L Based Multimeters’ »
July 16, 2010, 8:30 pm
Standard Arduino boards use FTDI’s FT232RL to interface with computer’s USB port. Since FT232R is just a USB to UART converter, it is possible to build an Arduino compatible USB interface using other USB to UART chips. Continue reading ‘An Arduino Compatible Using CP2102’ »