| Recently PREMA released the PR4101, a step-down driver designed for power LEDs. It requires an input voltage of between 7Â V and 40Â V and at...
All items tagged with Design and LED (25)
| The display shown here employs an LDR which causes the LEDs to dim during the dark hours, and light at slowly increasing brightness with day...
| White LEDs have a forward voltage drop of around 3.6 V. If we wish to operate a white LED from a single 1.5 V dry cell or 1.2 V rechargeable...
| The idea behind this project is a simple one. The power supplies for a (A)DSL modem and accompanying WLAN router can draw a total power of a...
| Many readers have asked how they can make their own E-blocks. This month we take a look at some options on making your own prototype E-block...
| If you want to apply computer control to a solenoid valve or another DC load there is no need to start looking for an expensive measurement...
| The switch-mode power supply chosen by the author for this article is built without the use of special-purpose ICs and so can be completely...
| This design for a Christmas tree lighting system employs ten red light emitting diodes (LEDs) instead of the usual lamps. The LEDs are power...
| Being an all-solid-state design you don’t have to tap on this barometer to get the latest air pressure reading!
| This article provides suggestions and other useful data to help you design a door or lock opener system based on a ready-made X-band...