alexglow @ instructables.com writes:
Note: By “beginner’s guide”, I mean a guide written by a beginner. (I made it at TechShop SF, during my first weeks!) I have some technique tips to share, but for more in-depth questions, Google is your friend.
Solder paste allows you to populate a board with many tiny components, without straining your eyes and fingers. Using minuscule components saves space, and you can dramatically cut down the space between them when you don’t have to solder every connection by hand.
Beginner’s Guide to Solder Paste - [Link]
This Design Idea describes a 9V battery-voltage monitor whose total parts cost less than 34 cents (Figure 1). You configure transistor Q1 as a 10-mA current sink. LED1, a Kingbright WP7104IT, is on when the battery voltage is good.
Configure a low-cost, 9V battery-voltage monitor - [Link]
This project describes an Arduino-based FM transmission using the KT0803K Digital Stereo FM Transmitter Radio-Station-on-a-Chip. The KT0803K device is designed to process high fidelity stereo audio signal and transmit modulated FM signal over a short range. It features an on-board 20-bit audio ADC and supports standard I2C interface for frequency setting and power control. [via]
DIY FM transmission station using Arduino - [Link]
This project was inspired by the “Big Air” open baffle system by Jim Strasser (please contact me for additional information regarding that system). That Big Air open baffle is a simple good sounding system based on a different woofer, smaller baffle and does not incorporate a few other things that I have added. My target cost was to build a pair of open baffle speakers for under $150US. In exploring the possibilities of open baffle speaker systems I reviewed numerous sources to gain an understanding of how they function.
COBIES – Cheap Open Baffle Speakers - [Link]
Although this kind of voice effect can be obtained by means of some audio computer programs, depending on the equipment you are using this microphone input and loudspeaker output could be more versatile. This design uses a variable gain microphone preamplifier built around IC1A, a variable steep Wien-bridge pass-band filter centered at about 1KHz provided by IC1B and an audio amplifier chip (IC2) driving the loudspeaker.
Telephone Call Voice Changer – [Link]
Top quality rocker switch with an IP65 protection can be available even for a very competitive price. It is the case of a novelty in our offer – Marquardt 1932.3112.
Series 1930 may be probably familiar to you, for example from our article Series 1930 – Double Pole Rocker Switches with IP65. Till now, we had in stock types 1935.x with green and red backlight.
We react to your requests for switch with the same excellent properties but without a backlight and for as good price as possible. Type 1932.3112 from company Marquardt features an advanced construction with an integrated gasket, thus the switch doesn´t require any other sealing or a special assembly procedure to reach IP 65.
With the price under 2 EUR/ pcs and a considerable stock level, we´re able to offer you a top quality switch for a very affordable price. The switch contains a reliable mechanism with a long lifetime and handles up to 120A inrush (capacitive) current.
In case of interest even in other versions, please contact us at email@example.com.
Say stop to dust and water with the Marquardt 1932 switch – [Link]
Scott Torborg and Star Simpson writes:
Google Glass is not only difficult to come by but requires tremendous skill to teardown. Scott Torborg and Star Simpson, in cooperation with SparkFun, took a look inside the sought-after device. They then graciously agreed to share the teardown as a way to “give back” to the engineering community. What follows is their look inside Google Glass.
Teardown: What’s inside Google Glass? - [Link]
Steve Taranovich writes:
This is a first in a series of stories called “EEvolution of an idea” showing how a good idea got its start and evolved into a viable product in the electronics industry. I would ask our faithful EDN readers to comment on this series idea and if there is a good positive response which views this as something useful and educational to our readers, then I would like to continue with more interesting and innovative stories like this.
I was recently alerted to an innovative new product called the PortPilot in a comment to an article on EDN.
PortPilot Pro is an inline USB power analyzer, designed by J. Loren Passmore. Passmore describes himself as “an entrepreneur who consults with companies in a variety of industries to envision innovative products and speed their path to market.
Innovative inline USB power analyzer - [Link]
DanNixon @ instructables.com writes:
I just happened to see some large strips of LED lighting when I was picking up some parts at Maplin which were on sale (if I remember correct they were around £12 per approx. 2m strip) however the controller/driver was still around £40, so I thought I would just build a better one myself.
I wanted it to be a web enabled controller as there are a lot of cool things that can be done with a device once it is accessible over HTTP, and I am working on a home automation server project so it would be good to have some devices which I can test this with.
Arduino Web Enabled RGB Lighting - [Link]
This Instructable will demonstrate the building of a bare bones (and really inexpensive… less than $5) Arduino compatible module that can be put together on a small piece of stripboard and can be used either on a breadboard or independently.
YABBAS – Yet Another Bare Bones Arduino (on Stripboard) - [Link]