Being mostly ‘digital’ guy, I’ve always shied off from switching mode power supplies because they are too much analog to my liking. I decided to break my habit by playing around with MC34063A, a 1.5-A Boost/Buck/Inverting Switching Regulator. I tried… Continue Reading
Again and again I need to look up the logic voltage levels of various logic gate standards like HC, HCT, LVT, and so on. I found a nice article on EETimes: A brief recap of popular logic standards. The page… Continue Reading
Today I tried pairing my UART-to-Bluetooth adapter to a Nexus 7 tablet to see how it works. On the tablet I used BlueTerm, an open-source terminal emulator for communicating with any serial device using a bluetooth serial adapter. I connected… Continue Reading
Mechanical drawing of my EPD ePaper display GDE021A1 is shown below. Signals to the display are connected via a 24-pin flex flat cable. The pitch between pins is only 0.5mm. A suitable matching connector is MOLEX 52435-2471 FPC RCPT 24PIN… Continue Reading
I started a new project called PIP-Watch: Personal Information Panel/Watch. It will be a kind of smartwatch. It will use an ePaper display and a bluetooth connection to a smart-phone. I also registered the project on hackaday.io, to take part… Continue Reading
I got myself an old Philips PM3310 Digital Storage Oscilloscope (DSO). The scope has a classic CRT screen, but otherwise it is a fully digital device. The scope has two channels. Analogue bandwidth of the input attenuator/amplifier is 60MHz, which… Continue Reading
Some five years ago I bought a nice UART-over-Bluetooth adapter module. The module emulates a serial port (UART) over a Bluetooth connection. All necessary chips and an antenna are mounted on a small PCB board depicted below. The type I’ve… Continue Reading
Finally I declare the Talking Clock project complete! Hardware is built and is working, documentation has been written. The permanent project web page is here. I have also created a parallel page on hackaday.io. Enjoy!