Hobby Projects - Insulation tester, LED Circuits, Meters.

Tuesday, August 14, 2007

Rico Schurig - NH7T/DF2CK - Ham Pages

Rico Schurig - NH7T/DF2CK - Ham Pages


shack, shortwave area

  • WLAN two Port Splitter
  • Waveguide Properties
  • SMA-Relay Properties
  • Helix Antenna Design
  • 23 cm Yagi Construction
  • worked DX vs. Radar Pics


Friday, August 10, 2007

Pilom Electronics Web Presence

Bicycle Light Projects

Constructing or modifying a bicycle lighting system should be done carefully to enhance the lighting and not displace a minimum lighting that is needed for safety.In rural areas and mountain bikes more lighting may be needed.

Dynamo LED light electronics - A nice selection of electronic circuits to power LEDs from a bicycle dynamo

Battery LED light electronics - A basic step-up circuit to power an LED from a battery
  • Universal single-LED headlight
  • Universal triple-LED headlight
  • Universal LED taillight mechanical construction
High-power halogen headlight

High-power halogen headlight from standard parts, battery-operated
  • Lots of light for your money
  • All standard parts, easily completed in half a day

Strippenstrolch - Elektronikbasteln

"Strippenstrolch" is thus a pitch name for "electricians". here you can also see a innovative project that combines rainwater harvesting and a solar energy operated pump to flush toilets.

Strippenstrolch - Elektronikbasteln
 
LED Lighting Projects, Learn Electronics, Basic Circuits and how they work. All in German.



"In Germany one finds this designation now and then for an electrician on the work. Particularly in the winter, if it is still dark in the morning, one often sees "Strippenstrolche" with its building lamp on the building site:"

Solar Pump

Combination of Rain and Sun Harvesting
 
"The inspiration for a self-sufficient toilet flush was now close at hand: I thought at first to work with a power supply that provides me the 12V to the pump. But as a power supply would idle constantly consume energy, I rejected this solution. I have long experimented with solar power, so I decided, now a solar system for our toilets to build. On the flat roof of our garage I installed two 12V - 55Wp - solar - modules (Conrad Electronics). This I switched in parallel."

"As a solar storage currently serves an ordinary car battery 45Ah (later 3 pieces with a total of 135 Ah). The charging control acquires an 8A charge controller (Conrad). So all very simple."

Tuesday, August 07, 2007

Jason Neals DIY Audio and Electronics

Dual Polarity Power Supply
Two versions of a dual polarity power supply with printed circuit board artwork. The supplies are built around the popular LM317 & 337 complementary voltage regulators which offer very high ripple rejection as well as short-circuit and thermal protection.

Jason Neals DIY Audio and Electronics

Microphone Preamplifier
A battery-powered microphone preamplifier and microphone wand for acoustic tests and recording. The preamplifier features 20dB of switchable gain and a clipping indicator,

Jason Neals DIY Audio and Electronics
An interesting website with many photos of electronic projects. There are not many projects but the description and photos and documentation are very useful for learning the art of circuit design.

Pavouks homepage

Pavouk's homepage

View from a bottom


by Pavel Ruzicka

Friday, August 03, 2007

Amplifier.cd - measuring instruments - audio

Amplifier.cd - measuring instruments - audio

Amplifier.cd - measuring instruments - audio

The Content consists of theory, test, analog technique and measuring instruments for amplifiers, electronics and Hifi.

A Tutorial describes fundamental ideas of electro-technology and the general amplifier and audio technology. The test equipment gallery shows measuring instruments - older, historical and partly new.

7A42 is 4 channel Plug-in amplifier

Obsolete Test Equipment Gallery

The 7A42 is 4 channel Plug-in amplifier up to 350 MHz. Conceived for the measurement of logic signals and offers the possibility for triggering the inputs logical AND/OR. So 4 data lines can be observed at the same time on the oscilloscope.