With the best wishes for you. I found your address and browsed your website. I have a question and hope to take your help and answer.
I need to good metal detector’s circuit and I find several in the web, any of them worked ? what is a problem in them and where can I find one that works with best depth? Could you design or point the mistake in some circuits? Thank you for your answer beforehand.
delabs – See my Related Page at Metal Detector Projects
Mail from AS
Thank you for your answer and sites. But some of them that are professional namely “twin loop” built but it has problem and didn’t work.
I think it may be a indicated, there is a problem with them. How can I make it correctly? could you proper design such circuits?
I am not professional and of you do, I will pay for your works.
Reply from AS
If you clearly specify what you want with a drawing, And indicate what you may be able to pay and your contact details too…….
Then, I will publish your request in my site. People visiting my pages may contact you. You can Try it out, I may not be able to help now.
(PS – You can offer a solution to AS’s Problem, post your design page details, All Comments are moderated, Commercial or Business comments will be deleted, designers can indicate homepage.)
The true Christmas Spirit is in giving, You can only give if you have something, right. You can Have when you Acquire Skills, Imagination and a Cheerful Attitude.This will help you Create Things! – dapj
Develop a Skill this Christmas, Build these small LED Trees and give it to people who need a little bit of cheering up.
Christmas Tree – CircuitStew “This was the first and last complete prototype that I made on proto board. This style of prototyping produces circuits that are very difficult to understand, debug, and modify. Because of all the extra work involved they also take forever to assemble. Suddenly I became very interested in designing and fabricating custom pcbs….”
The name CircuitStew refers both to the jumble of electronics presented here and to circuit boards suspended in neon green copper etching solution. – Derek Wolfe
First have a look at this How to Build a Robot a BeetleBot. This sparked the long lost memory of a book i read around 35 years back. My age was in single digits. This was when i had neither an idea of electronics or could afford any parts.
I had built many physics projects like weighing scale, gramophone, telegraph system, crystal radio. I will try to explain these later. Calling bells, gears and magnets from the flea markets my source of electricity & magnetism.
I read a hobby book from UK for children. It was a Beetle Car Bot, with four wheels and 4 light sensors. It could be LDR or photo-transistors, i do not remember. The light sensors were at the four corners of the car. The maneuvering was by variation in the speed of each wheel. It was based on germanium transistors mostly.
Four large lamps like 40W, had to be mounted on the ceiling, at the four corners of the room. By turning on and off these lights, this bot could go anywhere in the room. The whole book with pictures was dedicated to one bot and how-to build one.
Now that we have PIC and AVR; we can use Dimmable LED Lightning arrays to guide the bot. The challenge is in the mechanics of the bot, we have to forget that we have wireless for some time. Try this out.
Mitch Altman, president and founder, invented the company’s hit product TV-B-Gone® and turned the product into an international success practically overnight.
Cornfield Electronics – Mitch Altman
TV-B-Gone universal remote control is the first fruit of our technical savvy, embodying our belief in empowerment, and sense of humor.
TV-B-Gone now features the Instant Reactivation Feature which allows you to turn TVs on or off quickly and easily.
Electronic Glasses – Trip Glasses!
Blinking lights and sound guide you into gentle Meditation at home or Hallucinate in between meetings.This should not be used while walking, talking or driving any form of human transport including aircraft.
(This is a fun toy product and should not be used for any serious purpose, just play with it at home)
Cornfield Electronics, Inc.
1800 Market St. #123 San Francisco, CA 94102, USA
The following was submitted on July 11th, 2007 at 12:47AM (PDT).
Message: I want to combine Ne555 with 74154 IC.The indication of the outputs must be shown with LED’s but up to so far it need 15 outputs ,is it possible the way i did? if not i will need your assistance
Mail from CY
See these circuits you will get an idea, Using CD4514 is also possible.
“What happens when designers and makers look under the hood of the technologies that surround them and get their hands dirty with hardware and electronics?
This series of objects are the results of research in making our own electronic products while mixing in all sort of other crafts and technologies.”
Electronic Crafts – HandMade Electronics
Plug in a solar cell or use the hand crank to create your personal source of power. The latest version of the PPP charges 9V batteries.
Mini power plant for small projects
How to make your own Hand powered shake LED flashlight.
Before Hams invented DIY Electronics and even before Electric Current gained any respectable position in the Manufacturing Community. The thing that was making many heads nod in unison, was Steam Engines.
Coal, Steel and then Steam Engines made the word Industrial Manufacturing very Meaningful.
Toy steam engines museum – Chesterfield
See some inspiring videos of The Steam Engines at Michael Stacey of Chesterfield. Here you will find models from Mamod, Hobbies, Meccano, Bowman, Wilesco, Maxwell Hemmens, Stuart, etc.
Wilesco Dampftraktor D405.
Miss England – Twin jet propelled speed boat, Made by Victory Industries Ltd Circa 1948.