Hobby Hound

Practical Electronics Learning with DIY. Practical Experiments forge the book, college or web learning into a Skill.

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Monday, August 13, 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

Monday, August 06, 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