Hobby Projects - Insulation tester, LED Circuits, Meters.

Friday, January 08, 2016

Sci.Electronics.Repair FAQ

Sci.Electronics.Repair Frequently Asked Question(s) (or S.E.R FAQ for short) Home Page. This site features Samuel M. Goldwasser's latest and greatest "Notes on the Troubleshooting and Repair of..." series of comprehensive repair guides for consumer electronics equipment and other household devices.

Technology Resource - Silicon Sam

There is also a great deal of other information of interest to the electronics hobbyist, experimenter, technician, engineer, and possibly even the dentist and poet. Included are the now quite comprehensive and massive "Sam's Laser FAQ".

Sam's Laser FAQ has a great deal of information on a variety of laser and optics related topics including a comprehensive treatment of diode, helium-neon, argon/krypton ion, and CO2 lasers as well as amateur laser construction including numerous examples of truly home-built lasers. Much of this is not available anywhere else either on-line or in print!

Home-Built Diode Pumped Solid State (DPSS) Laser

Home-Built Diode Pumped Solid State (DPSS) Laser

This generates green light at 532 nm which is not a bad shade of green and quite close to the eye's peak sensitivity. This is the approach used in modern green laser pointers and most modern DPSS green lasers. While other materials can be used to obtain other wavelengths (blue being the most common)

Thursday, January 07, 2016

ELM - Electronic Lives Mfg

"My hobby has been a present occupation as it is because I liked electronics relatings since I was little. Railroad, anime, comic and TV game as well. As for programming in the hobby, because they are electronic handicraft" - Chan Japan

ELM - Electronic Lives Mfg

ELM - Electronic Lives Mfg

Chan has many projects for learning the use of Microcontrollers. even Instruments. You can even study about how to develop a PC Interface for electronic design you made. Then there are pages on Audio and Video Processing. See the LED Lantern and the Capacitance Meter too.

DC Servomotor Controller

This is an experiment on the closed loop DC servomotor control system (SMC). It will able to be used for practical use with/without some modifications.

Desktop Line Following Robot

In lines of the Japanese Tradition of Miniaturization, chan has built a tiny line following robot which can run on the desk, A toy that is one fifth the size of the line following robots, seen these days,

Monday, January 04, 2016

LED Christmas tree - Learning Electronics

Letter from Chris of PyroElectro.com in 2013 - Happy Holidays!

Here's a project I know your readers will love! It's an all-digital-hardware LED Christmas tree we're calling the Christmas Tree O'Digital Logic.

The tree itself is composed of 64 LEDs built into a spiral sitting on a piece of protoboard. Underneath, the controller uses shift registers and a 555 timer to create two modes of display: a predictable pattern and a random pattern. This should light up any desk or shelf and bring merriment to your readers!

LED Christmas tree - Learning Electronics

We're also running a Kickstarter campaign to fund our second free online electronics course, "An Introduction To Digital Electronics." We have just 4 days left to raise $2,124. If you would be so kind as to spread the word about our efforts, we'd be extremely grateful!

To build the tree, we'll use 63 green LEDs and 1 red LED. Lots of wire will be needed to make the spiral + cone shape of LEDs from top to bottom. To build a random pulse generator, we'll use some digital logic trickery with a 7404 hex inverter. A 555 timer will be used to drive 8 shift registers, which will control all 64 of the LEDs. Finally, a 4 bit timer should be thrown into the circuit in case we want to slow things down with a divider.