Targeting indoor applications such as audio and video products, consumer electronics, and panel instrumentation, this 20-segment bar graph is available in either lunar white light (see photo) or blue ...

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 Design Idea describes a simple LED-lighting-effects circuit comprising only five chips and costing only a few dollars. When you first observe the circuit in action, you will think that it uses a ...