One classic set you’ll see in most vintage mystery movies is an interrogation room with a “two-way” mirror in one wall. This cool gadget lets the witnesses see the suspects from another room while the ...

The Design Idea in Figure 1 is a precision current mirror used to drive two strings of five white LEDs. To protect the LED string from overcurrent due to an open in one of the strings, you can add two ...

Last time we looked at Spice models of a current sink. We didn’t look at some of the problems involved with a simple sink, and for many practical applications, they are perfectly adequate. However, ...