Hobby Projects - Insulation tester, LED Circuits, Meters.

Monday, April 13, 2015

Silicon Chip Electronics Magazine

Hobby Electronics, Computing, Kits and Projects. Online version of Australia's only electronics magazine, and is primarily directed to professionals, trades people and enthusiasts in the electronics, electrical, computer and related fields.

Silicon Chip Electronics Magazine

Projects to build do it yourself to save money, to learn new skills or simply for the fun of it!. Serviceman's Notebook Actual cases, often unusual, from the bench of a full-time serviceman. Vintage Radio bringing back to life the discards of previous generations.

Silicon Chip Electronics Magazine

Each Silicon Chip design is carefully checked and tested and readers with the appropriate construction skills should be able to duplicate the design and have it work in the same or similar manner to the prototype.

Electronics Australia - EAT - Files

"Here you will find a wealth of electronics-related software, covering everything from PCB layout through to loudspeaker design suites.Electronics Australia and EA Today are no longer being published. SILICON CHIP is now the only electronics magazine published in Australia. It is available each month from your newsagent or directly mailed from the publisher by subscription."

Monday, April 06, 2015

Energy Harvesting in Shoes for Small Devices

Walking is a Source of Energy that can be Harvested to Power LEDs or Wearables. It may one day Recharge your Smartphone or tablet. Just start running when the Battery goes low on your Phone. - Ananth

Here is the first page that will interest you - Parasitic Power Shoes Project

Energy Harvesting in Shoes for Small Devices

"environmental energy sources can begin to replace batteries in certain wearable subsystems. In this spirit, this effort has examined devices that can be built into a shoe, (where excess energy is readily harvested) and used for generating electrical power "parasitically" while walking."

Piezoelectric Energy Scavenging In Shoes 

Goal: To develop a rugged piezoelectric shoe insert and complementary conditioning electronics for unobtrusive, parasitic harvesting of the compression energy normally lost while walking

Friday, April 03, 2015

Make an Encoder for your Bot

I want to build a cheap wheel encoder by myself. - Need some help here. I want to build a cheap wheel encoder by myself. Now, my idea was to use a photodiode and a LED. What i don't know is how to use the output from photodiode to put on a GPIO on my MCU board. Do i need some resistors or something. Aaaa, i need a high level of 5V for my GPIO. I - AV

Answer

Please study Links Below
 
Optical Encoder Project - "Many years ago, I competed in MASLab, an MIT competition to build an autonomous robot. A year or two after that, I was on the MASLab staff, helping prepare the hardware for the year's competition. One of the projects I worked on was an optical encoder."

About Encoders and How to Make an Encoder Wheel

"A typical encoder uses optical sensor(s), a moving mechanical component, and a special reflector to provide a series of electrical pulses to your microcontroller. These pulses can be used as part of a PID feedback control system to determine translation distance, rotational velocity, and/or angle of a moving robot or robot part."

Make your own rotary encoder

Make your own rotary encoder

"In the first and second post of this series you saw the basics of how to use photointerrupters. Now it’s time for practice. We make a rotary encoder. Here we take a single photointerrupter that gives us the pulses we can count."

Make Your Own Encoders chat - "I'm starting a·dedicated·thread on the specific encoders I used on my Homebuilt platform. I had great results. A word about the encoder disks: they must be mounted PERFECTLY to achieve consistency. Perfectly flat, true, and concentric.

Incremental Optical Encoders

Here is a method for making an encoder with two sensors for your application. If you only need speed sensing, you may want to skip down to the construction section. The important variables are the radius of the circle (r), the distance between the two optical sensors (s), and the number of divisions in the wheel (d). .....

Incremental Optical Encoders

Ananth -

Use a photointerrupters, even from an old wheel mouse if you want or build one. Then you need a Wheel with stripes and a Schmitt Trigger Gate or Comparator