The circuit in Figure 1 uses only five I/O lines to drive a dot- or bar-graph display of 20 LEDs. Although this version of the design uses a small and inexpensive one-time-programmable microprocessor, ...

This circuit uses two National Semiconductor LM3914 dot/bar-display-driver ICs to implement a two-digit, 0 to 5V LED voltmeter that mimics a subranging flash ADC. An LED bar graph comprising five LEDs ...

If you have a MacBook or MacBook Pro this is a truly great way to turn your laptop into a desktop computer, it’s certainly more focused than any other display, and the built-in power and USB ...

I spend a lot of time at my desk, most of that time staring at a big computer display. And while I recognize lighting is important, I’ve been using a standard LED desk lamp for years, even though it ...

Rik is Pocket-lint's senior news editor and has been a tech and games journalist since the 80s. He has seen and covered just about every console, mobile phone, gadget and home cinema device launched ...