The old resistor decade boxes consisted of a bunch of rotary switches which make them little bulky and expensive. Stynus has built this microcontroller-based resistor decade box that uses one rotary encoder and 16 relay switches to switch on the various resistances. The microcontroller used in this project is PIC16F84A.
PIC Microcontroller based resistor decade box - [Link]
Featuring 3 OLED screens on a flexible circuit board, this minimalist electronic wearable is stunningly bright, likes to be touched and features a rechargeable 10 hour battery. Apologies about the hairy arms (and the dubstep)!
This is just a prototype but with a just a little more work this could easily be thinner and more attractive to wear. Be on the look out for a new version with some 3d printed parts to present a more honest take on the bracelet.
From the Makers of Arduboy: Ardubracelet - [Link]
Microduino-Joypad is … an 8-bit game console + open source + UPin27 + AVR,STM32,MSP430,51 compatible + smart controller == Awesome! by Microduino Studio:
Microduino studio launched the first kickstarter in September 2013, introducing the brand new Arduino-compatible development board—Microduino. We achieved success with the unique Upin27 interface, compact size, rich expansion boards as well as many applications. Over the past year, Microduino community has been growing rapidly. Now we have nearly 10,000 players worldwide.
At the 25th anniversary of the Gameboy console, we are now releasing Joypad – 8-bit multi-functional game console to show our respects to Gameboy–the most classic game console in the history.
With this elegantly designed little Joypad, we are hoping to bring you the greatest joy from your childhood memory. The best thing is it’s completely open source and you can even create and develop your own game to inspire your imagination. Moreover, it’s not only a game console, it’s also a remote controller for other devices, such as Quadcopter, robot and cell phone, etc.
Microduino-Joypad: an open source 8-bit game console & more! - [Link]
The most popular RTC for the Arduino is the DS1307. However, it does have some drawbacks, the most notable of which is that its operating voltage is 5v, which means it cannot be used with 3.3v projects. The Maxim DS1339 however, features a wide tolerance of voltages from 2.97V-5.5V with the typical voltage as 3.3v, a battery backup, two alarms, and a trickle charger. The breakout board here packages the DS1339 with the components and connections necessary to use with your Arduino projects easily.
MAX DS1339 RTC real time clock for arduino - [Link]
A good beginner app note (PDF) from NXP on protecting ICs from ESD.
Integrated circuits are sensitive to electrostatic discharge (a sudden and short-time flow of currents) and electromagnetic fields (at which they can be source or victim of both of it). This application note shall be understood as an introductive basic description of what electrostatic discharge is, how sensitive devices can be protected against electrostatic discharges, what electromagnetic compatibility means and how electromagnetic sensitivity can be tested.
App note: ESD and EMC sensitivity of IC - [Link]
Programme of webinar:
Linear Technology’s family of DC/DC Module products simplifies your analog design. By integrating the DC/DC controller, power switches, magnetic, and a modest amount of capacitance, uModules power products will save precious space on the PCB and reduce the solution weight, development time, BOM qualification and procurement effort.
- Product groups and parameter ranges
- uModule construction
- Reliability data
- Features: ultralow noise, output sharing, synchronizability / multi-phase operation
- Information resources
- Applications examples.
SOS Webinar – Your way to simple and efficient power supply design with Linear Technology - [Link]
IP phones require data and power on the same cable. A high voltage power source of 48V is required, to reduce the voltage drop in the cable. This project has a DC-DC step-up converter that can deliver the required 48V supply at high efficiency. The MAX668 is an excellent choice for the design of this DC-DC step-up converter. The MAX668, a current-mode controller, operates in the PWM mode at medium and heavy loads, providing high-efficiency and low-noise. With power levels greater than 20W, efficiencies of more than 90% are achievable.
MAX668 48V IP Phone Power Supply – [Link]
A home security and video monitoring breakthrough. Security and privacy, without the monthly fees.
Controlled directly from your mobile phone or tablet, CamPoint is a unique device that connects wirelessly with security cameras to make them smart. Experience the peace of mind that having security and privacy brings.
CamPoint harnesses the latest video home security technology and lets you customize it to your own safety and privacy requirements.
You decide which events are important, and which ones justify an instant alert sent to your mobile device. CamPoint learns quickly, so you only see what matters to you.
1. Rapid Learning System: CamPoint learns what things matter to you, alerting you when an important or unusual event happens, whilst not troubling you with false alarms.
2. Local Analysis and Storage: CamPoint analyzes video locally, with its smart algorithms determining what is important to you. It also has smart storage options. It stores video locally, but is intelligent enough to send important or unusual video footage to the cloud for backup. This eliminates the need for monthly fees. Storing personal footage locally also protects your privacy.
3. Choose Your Camera: CamPoint is compatible with a wide array of leading camera brands, giving users the freedom to choose their camera.
CamPoint: Smarter than smart home security - [Link]
General Electric is releasing an interface board that will let you program and control their smart appliances, and they’re giving away a batch of ovens and refrigerators to makerspaces to help launch the project.
The program comes through the FirstBuild program, a new endeavor by GE and Local Motors to interface with independent designers to find, make, and license new product ideas much more rapidly than normal for the manufacturing giant. The interface board, called the Green Bean, is their first product, released to help makers generate new appliance-based projects.
GE Launches an Interface Board to Let You Hack Their Appliances - [Link]
Dave plays around with an energy harvesting kit to see how much power he can get out of a Peltier device used as a Seeback effect module to generate power from temperature differentials.
Bonus white board tutorial of how Peltier devices work as heat pumps.
EEVblog #664 – Peltier TEG Energy Harvesting Experiments - [Link]