Netherlands-Belgium

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Amplimo has got a very large range of toroidal transformers available directly from stock. Standard range transformers have been approved by KEMA and UL . Built and tested according to the international standard EN61558 .

Amplimo – Toroidal Transformers

Sstandard range have a 230V primary and two equal secondary windings. These windings can be used individually or can be used in series or in parallel.

Amplimo - Toroidal Transformers

Standard range transformers are also available with 2x 115V primary to be used in series or in parallel.

Toroidal-Transformer.com – Here you can order Toroidal Transformers.

Amplimo presents a generation of amplifier modules offering outstanding advantages, allowing the rapid construction of quality audio amplifiers for many applications. These hybrid modules contain the complete audio amplifier circuit for connection between the preamplifier or mixer and loudspeaker, they are very stable even with complex loads and are therefore very reliable as the likelyhood of oscillation has been reduced to a minimum.

Amplimo BV
Industrieweg 14, NL7161BX, NEEDE, The Netherlands.

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“At the age of 10 we moved to Copenhagen for about 2 years. I had some friends there who knew that I liked old radios so regularly someone brought me one. (See my picture at the main page) Among them was the Bang & Olufsen – Grand Prix 48 K (photo). I liked this radio so much that I wanted to make it work again. There was not much wrong so I got it working. Later when we were back in Eindhoven, I made so many …….”

Franks Electron tube Pages

Franks Electron tube Pages

Frank Philipse – Waalre, the Netherlands.

  • Tube Number Systems
  • American Substitutes for Foreign Types
  • Foreign Substitutes for American Types

The tube data resides on several mirror sites in several countries and they are exactly equal, except for the Poland site which additionally has been equipped with a tube search.

More about Frank’s Experiments

“Back in Eindhoven, there where the 60’s. Radio Luxembourg on my B&O etc. I got interest in guitars and amplifiers. I built several Amps. My first amp was something with the EF11 and the EL3. I also built a copy of the Philips EL6431 Amplifier. (That’s where the output transformer of my B&O radio went) In Eindhoven there was a repair shop called ‘De Radiodokter’. He had some old TV chassis in the display for 5 guilders each. When I had saved enough money, I bought some. Then when I was about 16 I made my first really working TV from these parts.”

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hobby-electronics.info information site electronics hobby.  For beginners or learners taking an electronics course!  would be a fun way to start. Electronics Projects page has some projects with a PCB layout for easy building too.

Learn thru Hobby Electronics

Learn thru Hobby Electronics

The Course – “We start with a few lessons about voltage, current en resistance. Next, we’ll discuss power dissipation and capacitors, diodes and transistors. We now have enough knowlegdge to build a simple power supply. And after a few lessons about differential amplifiers and operational amplifiers, we are even able to design and build a professional lab power supply.”

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“VELLEMAN nv has been a major distributor of electronics for more than 35 years. Our warehouses contain over 18,000 different products from 50 brands.”

Velleman – Kits Tools and Equipment

  • Velleman kits & oscilloscopes
  • Transformers, coils & motors
  • Semiconductors & sensors
  • Passive components
  • Batteries & chargers
  • Adapters & power supplies
  • Enclosures

They have the Test bench tools, parts and also all the prototyping materials.

A Velleman Power Supply for the Test bench

A Velleman Power Supply for the Test bench

Velleman Inc. 7354 Tower Street, Fort Worth, Texas 76118

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Ronald Dekker’s Nixie Tube Projects and Software. He has many interesting projects like “Mixed-Signal” LED clock, The µTracer, a miniature tube curve tracer. A Tiny 80(C)31 Basic Board.

Electronic Projects of Ronald

(Image Below Colored and Enhanced by me- ananth delabs)

Ronald Dekker's Projects

NIXIE II A Talking NIXIE Alarm Clock! This Nixie Alarm clock will wake you up with a personal wake-up message or sound. A “wav” file stored in EPROM is played using only a few counters and a DA converter.

The µSCOPE – A poormans OscilloScope

“These days this obviously can be done much simpler. The present generation of micro controllers is so powerful that such a videoscope concept can be realized almost completely in software. Recently I obtained a sample of the 12f675. On examination of the datasheet of this small 8 pins micro controller from Microchip, it appeared that the small package contained all the components of a miniature videoscope. In short the µSCOPE project was born, with as main objective the challenge of implementing such a relatively complex task in this small micro controller. The result summarized on this web page is a fully functional (memory)scope that samples the analogue input signal and subsequently displays it on a normal TV”

Dmitrij Kazakov’s verion of the µSCOPE

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usbtiny – Software USB implementation

USBtiny is a software implementation of the USB low-speed protocol for the Atmel ATtiny microcontrollers. Of course, it will also work on the ATmega series. The software is written for an AVR clocked at 12 MHz. At this frequency, each bit on the USB bus takes 8 clock cycles, and with a lot of trickery, it is possible to decode and encode the USB waveforms by software.

USBtiny

Other Atmel AVR Projects he built are

  • batwatch – Monitor for a solar panel car battery charger
  • webasto – Remote control of Webasto water heater
  • blink – Automatic turn signal light
  • nikon- Nikon Camera Remote Control

Projects of Dick Streefland from De Bilt

Dick Streefland, lives in Amersfoort, in the center of The Netherlands. He has some Atmel AVR Projects and he is a big fan of Linux. He started on a 6809-based home-brew system with the OS9 operating system from Microware.

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Wouter van Ooijen runs VOTI is an engineer who has worked on many software and systems projects. He has a Webshop with PIC Parts and Kits. His PIC FAQ and “blink a LED using one of these flash PICmicro controller” is great for beginners.

Van Ooijen Technische Informatica

Van Ooijen Technische Informatica

A very slow 0.. 5 Volt fader

A circuit that generates a voltage that rises slowly from 0 to 10 Volt and (when a switch is flipped) slowly back to 0. The request did not pose much restriction on the wave form, but a rise / fall time of 30 minutes should be possible.

I got a mail question, which i logged here Long Duration Linear Sweep or Ramp Generator. The above project could be an neat answer.

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CompuPhase articles and Application notes CompuPhase

On-line publications “for programmers”; they are also written “by programmers”.

CompuPhase develops electronic designs, printed circuit boards, prototypes of custom apparatus and the embedded software that runs on the devices.

Examples of such apparatus are the various LED-panels that we set up in several exhibit centres, under contract of Podium (Netherlands). Embedded systems

CompuPhase Services include contract programming of applications and embedded systems, and also the design and production of custom electronics.

http://www.compuphase.com/mp3/h0420_photo2.jpg

CompuPhase Projects and Programmable MP3-player

On the right is a Programmable MP3-player for scale models, broadcast systems and special applications.

High quality audio, based on a 24-bit D/A converter with 8× oversampling digital filter, low noise and low distortion.