A timer-controlled doorbell device has been developed using two 555 timer ICs in monostable mode, combined with a relay driver and a control circuit.

The Blink Video Doorbell offers sharp 1440p video with a head-to-toe view of your doorstep and the convenience of battery ...

Find out how you can change a circuit by adding items like switches with this Bitesiz KS2 science animation and a fun activity.

This paper presents a new method for modeling and identification of a simple electric circuit described by fractional-order differential equation. The Grunwald-Letnikov fractional-order derivative is ...

Time-resolved luminescence (TRL) measurement is a sensitive detection technique by eliminating sample autofluorescence, but TRL measurement instruments composed of multiple key components (e.g., a ...