Digital pulse counter

This here is a simple but versatile pulse counting/smoothing integrator circuit with an NE555 as the shaper, and a little LCD display as the output. I have originally done it for counting pulses from my Geiger counters, so I have included a piezo speaker combined with an LED for indication, but it can also have a variety of other applications, like revolution counters, track/lap counters… [more]

USB DVB-T Dongle

In mid-2010, Slovakia had been converting into DVB-T and analog terrestrial TV transmitters were continually phased out. On April 30th, a new DVB-T transmitter, located just a few kilometers away from me, was put into service. I was already using an IP TV with two receivers… [more]