A curious connection of control buttons makes a simpler-is-better digital potentiometer interface possible. Two recent submissions to the Design Ideas kitchen (see Related Content) have shown different basic step-per-push pushbutton interfaces for ...
Using the concept and leveraging the example circuits in this Design Idea, you can divide any frequency by any number divisible by 2. Any dividend frequency can be divided by any number representable by 2 n , resulting in a square wave output ...
A single 1.5 V silver oxide button cell powers this complete touch activated switch circuit for 5 years. It features both a normally open and a normally closed set of solid state switch thermals. It also has an adjustable sensitivity, which can be ...
This circuit exemplifies the thesis that the 555 is to analog timing what the opamp is to analog “everything else”! In any contest to see which is easier to manually program, digital potentiometers (dpots) suffer a big handicap when ...
Courtesy of this circuit’s flexibliity, you can select and adjust both, one, or none of the channels of a dual digipot. One huge advantage that digital potentiometers have over electromechanicals is, of course, the inherent flexibility the ...
Simple circuit saves hard-working fingers from unnecessary wear and tear. Digital potentiometers (DPOTs) with manual up/down increment/decrement interfaces can have real utility as versatile substitutes for traditional electromechanical pots. But ...
Some folks prefer pushbutton switches to take effect on push instead of release. These buttons do that very thing. I suppose it’s really just a matter of taste, but I’ve always liked momentary contact switches that act when you push ...
Front-panel push button controls can conveniently adjust a PCB-mounted internal potentiometer’s resistance. Digital potentiometers in conjunction with MCUs find common use in analog circuits. The processor can adjust the gain of an amplifier, ...
The circuit is powered for years by a single 3 volt lithium battery. It sounds an alarm when the temperature exceeds a certain point. With some minor changes the circuit could also be configured for an under temperature (freeze) alarm. The circuit ...
This circuit uses a flat piezoelectric wafer, glued inside a plastic box, as a finger tap sensor. With each tap of a finger to the box holding the wafer, the circuit turns on and off AC or DC power to an external device. The circuit is powered by a ...