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## Elektronik und Mikrocontroller – Burkhard Kainka

Author of books and CDs, Microcontroller, interface programming or new ideas for hobby projects. The Electronics Fundamentals for hobby and education helps the beginner with valuable information.

The electronic logbook is amazing, you can have a look at so many circuits and projects with photos. You will learn many things and make you develop skills.

Elektronik und Mikrocontroller – Burkhard Kainka

For the advanced Hobbyist there are projects on Microcontroller and Measuring and control devices with the USB and PC Interfacing,

Electronics experiments for children – “For children it is easier than for adults. Since it is enough, if someone applied sufficient time and a little tinkering with them. Often all it takes is a little push to arouse interest and skills.”

## Electronics 2000 – Beginners Guide

Hobby Electronics – Software, Calculators, Forum, Technical Data, Pin-outs, Beginners Guide, Links.

Electronics 2000 – Calculators

A beginners guide to project building, technical data, interactive formulae calculators, software downloads including Electronics Assistant and EPE Index.

Electronics Assistant is a Windows program that performs electronics-related calculations. It includes a resistor colour code calculator, resistance, capacitance and power calculations and more.

• New 555 timer, voltage regulator & RC filter calculators
• Enhanced series / parallel resistance & capacitance calculator
• Calculation of preferred capacitor values with a choice of series from E6 to E24

## Flashing Mains Neon Lamp

Here is a Neon Flasher circuit (untested) for a user request at Circuits FAQ. This can be built into a switchboard or a gadget for indicating Live Power.

D1-C1 form a simple half-wave rectifier, The Cap charges to peak voltage and can store charge for a long time if there is no bleeder. So while building it take extra care. This forms a DC supply across C1. C1 is a Plastic High-voltage cap, IN4007 has a 1KV rating, so it is ok for 230V rectifier.

R1 Charges C2 and when C2 reaches 60-80V depending on Neon, the neon breaksdown. C2 Discharges, Neon Recovers, The C2 starts charging again and so on and on. It Oscillates, probably in a Ramp Waveform. But do not use your Scope on this, you will regret it a lot. This is a live circuit and needs a special probe.

“Oh, i will put the probe it in 10M mode” will not do. The ground clip of the probe goes to Electrical Earth which is ‘connected’ to Neutral in the mains wiring. So you put the earth crocodile clip on the live point. There will be flashes and fireworks. So you need to isolate both terminals of scope. Please use your costly equipment with great care.

For the 1 Meg use two 470K in Series for 230V AC, that is safer. The circuit is live, so take precautions. The 0.47 Micro Farad can be increased if you want a slow flash. If the Mains 50/60 Hz Flicker is too much, the 1 uF can be made 2 uF, or use 4 – 1N4007 as a bridge rectifier.

 From Schematics of delabs

User Feedback –

R1 of 4.7M and C2 of 0.47uF Works well at 230V AC. Try your own Combination. Less than 1M may damage Neon.

## Adafruit Industries – Unique DIY electronics

Adafruit Industries is a small company that sells kits and parts for original, open source hardware electronics projects featured on ladyada as well as other cool open source tronix that I think are interesting and well-made.

Adafruit Industries – Unique DIY electronics

All the projects are redesigned specifically to make it easy for beginners to make: nicely silkscreened circuit boards, through-hole parts whenever possible, extra large solder pads, etc. For some kits, you can purchase just the circuit board. To save paper, the easy-to-follow-with-lotsa-pictures instructions are all available online, at ladyada.net-make.”

Atmega328 chip has twice as much storage, runs at 16.00 MHz, just like the latest Arduino. Upload baud rate is 57600, use Arduino IDE v13+. Chip comes preprogrammed with my “no-wait” Arduino bootloader.

• Designed to plug into a breadboard for easy prototyping
• Petite size, only 3″ x 0.8″ (75mm x 20mm)
• All ‘standard’ pins are brought out – Digital 0 thru 13, Analog 0 thru 5, ARef, 5V, Ground, Vin and Reset
• Chip comes preprogrammed with a “no-wait” Arduino bootloader
• 2 LEDs, green power and red “pin 13” just like the Arduino Diecimila
• Available as a low cost kit with standard parts, so its never out of stock
• All through-hole parts are easy to solder

Boarduino (Arduino Clone) Kit

This clone acts just like an Arduino, and works with the latest Arduino software. For many projects it can even be preferable! The kit includes all parts necessary, the assembly is straightforward and well documented.

## Metal Detector Circuits Problem

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

delabs

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.

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.

delabs

(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.)

## Museum Of Electricity – Charles Brush

Yes, there were electric lights powered by central stations before Edison’s! Carbon arc lamps saw extensive use throughout the USA and the world from the late 1870s on. – Charles Brush

Museum Of Electricity – Charles Brush

The General Electric Company was formed in 1892. It was the result of a meger between the Edison General electric Company and the Thomson-Houston Company, which themselves incorporated several other companies.

Electricity, technology, and lots of arcs and sparks!

Museum Of Electricity contains Vintage Electrical and Historical images and description. They include the Edison Lamp, Tesla Coils, Lightning and Atmospheric Electricity and the …..

So how do they work?  First two conductive metal rods are positioned in a rough “V” shape with a slight space between them at the base.  A sufficient voltage differential is provided from a high voltage transformer to breakdown the air in the gap between the rods.

## VU Meter Circuits and Projects

Here is a collection of web pages of VU Meter projects that helps a newbie getting into the Electronics DIY Hobby Land.

A Hobby now in your School days or College can help you build a strong profession later. It is Edutainment that will make productive use of your spare time. Friends can do it as a group, during holidays. Parents should encourage healthy hobbies, as the children will grow in a positive and creative atmosphere.

Stereo led level meter – This is it. It’s a STEREO LED LEVEL METER. It’s the cheapest and best bar graph display available and best of all, it uses readily available components.

VU-meter by Archy – Then it hit me. A VU meter, big, beautiful, professional! From that moment started my thoughts flowing. Those VU-meter ICs that are sold in every electronics shop?

LM3914 dot-bar display driver – The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display.

Knight Rider Display Project – This project started out as a VU meter. I reused parts and pieces to improve the VU meter and give it additional functionality. It is amazing how much time it takes to create a small thing like this.