Got a buck? Make a charger for LiR2032 coin cells. It could hardly be cheaper or easier.
This Lithium battery charger circuit board, based around a TP4056 chip, will set you back all of $0.90. That may be an overestimate. I won an auction this week for 5 of them and paid $1.36, shipping included.
$1 Lithium Coin Cell Charger - [Link]
This is a heart-shaped LED chaser would be a nice gift for Valentine’s Day. Circuit is very simple and uses the 555 timer IC (configured as astable multivibrator) and CD4017B decade counter.
The object of your desire will not be able to resist a heart-shaped LED chaser, lovingly hand-crafted on perfboard with a CD4017B decade counter and 555 astable. But you probably can’t go wrong with flowers and chocolates as well. Just to be on the safe side.
Heart-shaped LED chaser for Valentine’s Day - [Link]
A research team at Virginia Tech has produced a low-cost rechargeable battery that runs on sugar. They are not the first in the field to develop a sugar battery but the energy density of their design shows an order of magnitude improvement over existing sugar-based battery technology.
The findings from Y.H. Percival Zhang, an associate professor of biological systems engineering in the College of Agriculture and Life Sciences and the College of Engineering, were published in the journal Nature Communications. According to Zhang “Sugar is a perfect energy storage compound in nature, so it’s only logical that we try to harness this natural power in an environmentally friendly way to produce a battery”. [via]
Battery Recharging… One Lump or Two? - [Link]
Software simulator for Electronic Assembly display EA DOG series will bring you a clear image about possibilities of this favorite series.
Usually, when we start working with some monochromatic display with a color backlight, we have to imagine which combination of display/ backlight would suit us the best. It isn´t hard but for sure even here is valid, that “it´s better to see once than to hear three times”.
For this purpose will serve well a simple application StartDog, in which you can “try” for free various EA DOG series displays in combination with various color backlight (including RGB). This application will simplify you choice of a display without useless expenses. Besides a possibility to choice types themselves (with various resolution), it´s also possible to choose 4 basic kinds of “glasses”: STN positive Y/G, STN negative blue, FSTN positive and FSTN negative.
Application StartDog also cooperates with the EA9780-2USB development board and so the text or image displayed on your PC can be seen also on the EA DOG series display.
Start with the EA DOG displays for free - [Link]
WiFi 802.11 b/g/n module usable immediately and with a minimum effort may be the right solution even for you.
There are many types of WiFi modules with various features on the market. For example recently described WizFi630 is literally full of functions, which take it into a class of routers. On the other hand a novelty WizFi250 has somewhat less functionality but meets all common requirements for a compact and easily applicable WiFi module suitable for a mass usage into various devices and it adds an important bonus – a very competitive price. WizFi250 provides all necessary for a simple usage – an integrated RF amplifier, antenna, low power consumption, 1MB Flash and secure protocols (WEP, WPA, WPA2PSK) and mainly easy control by simple AT commands. Thanks to its features is the WizFi 250 suitable for all common 8/16/32 bit microcontrollers.
WizFi250 – WiFi quickly, easily and cost-effectively - [Link]
This video shows the detail process of making of a chip at Philips Factory.
Chip Manufacturing Process – Philips Factory - [Link]
Anthony Smith writes:
Low-current, momentary action pushbutton switches, such as PCB-mount ‘tactile’ types, are cheap, and available in an abundance of different styles. Latching types, on the other hand, are often larger, more expensive, and available only in a relatively limited range of styles. This can be a problem if you need a small, inexpensive switch for latching power to a load. The solution is to convert a pushbutton’s momentary action into a latching function.
Latching power switch uses momentary pushbutton - [Link]
amandaghassaei @ instructables.com writes:
The Arduino is a pocket-sized computer (also called a “microcontroller”) that you can program and use to control circuits. It interacts with the outside word through sensors, leds, motors, speakers… even the internet; this makes it a flexible platform for lots of creative projects. Some popular uses include:
- programmable light displays that respond to music or human interaction
- robots that use information from sensors to navigate or perform other tasks
- unique, customizable controllers and interfaces for music, gaming, and more
- connecting real world objects to the internet (twitter is especially popular)
- anything interactive
- automating and prototyping
Beginner Arduino Course - [Link]
In this article you will learn how to programm an ATtiny mcu using Arduino IDE.
Follows are directions for programming the ATtiny microcontrollers using the Arduino IDE. In plain English, this is how to program 8-pin Atmel chips as you would normally an Arduino. This is cool because the ATtiny is tiny, and – well – this allows you to make tiny things that don’t need a big ol’ microcontroller.
Program an ATtiny with Arduino - [Link]
Tom posted his Arduino PID controller shield in the dangerous prototypes project log forum:
Program a temperature profile to mash beer or reflow solder. Here’s how.
This full featured open source PID controller uses a DIY stripboard shield for Arduino Uno and compatible boards. Firmware based on osPID massively revamped and extended, blood was sweated over new auto tune routines. Standalone or remote operation over UART using Java GUI. All documented on Github with BOM, schematics, code, pictures etc. Parts cost about $15, external SSR module and Arduino required.
I spun this project as a kit for Tayda, with the idea that all the components could be cheaply ordered in one place.
Open source PID controller (DIY Arduino shield) - [Link]