Download 30 LED Projects by Colin Mitchell PDF

By Colin Mitchell

Простые схемы на доступных элементах.

Show description

Read Online or Download 30 LED Projects PDF

Best electricity books

Self-Assembled Quantum Dots

In recent times, the sphere of self-assembled quantum dots has proven nice promise for nanoscale functions in optoelectronics and quantum computing. all over the world efforts in either conception and experimental investigations have pushed the expansion, characterization, and purposes of quantum dots into a complicated multidisciplinary box.

30 LED Projects

Простые схемы на доступных элементах.

Quantum Theory of Near-Field Electrodynamics

Quantum thought of Near-field Electrodynamics offers a self-contained account of the elemental idea of field-matter interplay on a subwavelength scale. The quantum actual habit of topic (atoms and mesoscopic media) in either classical and quantum fields is handled. The position of local-field results and nonlocal electrodynamics, and the tight hyperlinks to the speculation of spatial photon localization are emphasised.

Electrodynamics: An Intensive Course

This ebook is dedicated to the basics of classical electrodynamics, probably the most attractive and efficient theories in physics. A basic survey at the applicability of actual theories exhibits that basically few theories may be in comparison to electrodynamics. basically, all electrical and digital units used around the globe are in accordance with the idea of electromagnetism.

Extra resources for 30 LED Projects

Example text

BATTERY MONITOR MkI A very simple battery monitor can be made with a dual-colour LED and a few surrounding components. The LED produces orange when the red and green LEDs are illuminated. 6v. 6v BATTERY MONITOR MkII This battery monitor circuit uses 3 separate LEDs. The red LED turns on from 6v to below 11v. It turns off above 11v and The orange LED illuminates between 11v and 13v. It turns off above 13v and The green LED illuminates above 13v LOW FUEL INDICATOR This circuit has been designed from a request by a reader.

The chip is actually a counter or divider and the frequency picked up by the piezo is divided by 128 and delivered to one output and divided by over 8,000 by the highest-division output to three more LEDs The other lines have lower divisions. This creates a very impressive effect as the LEDs are connected to produce a balanced display that changes according to the beat of the music. The voltage on the three amplifiers is determined by the 3M3 and 1M voltage-divider on the first op-amp. It produces about 2v.

THE DOMINO EFFECT Here's a project with an interesting name. The original design was bought over 40yearsa ago, before the introduction of the electret microphone. They used a crystal earpiece. We have substituted it with a piezo diaphragm and used a quad opamp to produce two building blocks. The first is a high-gain amplifier to take the few millivolts output of the piezo and amplify it sufficiently to drive the input of a counter chip. This requires a waveform of at least 6v for a 9v supply and we need a gain of about 600.

Download PDF sample

Rated 4.76 of 5 – based on 45 votes