Schematics (Page 8)

Schematics or Circuit Diagrams that aid learning.

ePanorama.net – Electronics Resources

Links, Documents, Circuits, Forums, Downloads, Search, Acronym, Datasheet, Calculator, RFCs, Schematics, HW. Book.

ePanorama.net is a web site, which is dedicated to offer information on electronics found from the web. ePanorama.net was originally born from Tomi Engdahl’s Electronics Info Pages.

ePanorama Forum –o– ePanorama Search

Sam has some wonderful Audio and Video circuits. He is from Greece the land of Mythology and the Gods. These are Electronic Circuits and DIY Projects for the hobbyist.

Sam Electronic Circuits

There is a huge collection of Valve or Vacuum Tube Power Amplifier circuits. Even Hi-Fi Preamplifiers based on these tubes. Power Supplies and Test Instruments you could build to power-up your Hobby Bench at low cost.

Sam Electronic Circuits

He has circuits for the Automobile and battery as well. Clock and Timer circuits for Home Automation. VU Meters and Graphic Equalizers to make your Audio dream project.

When i came online in the late nineties, i discovered Sam and other sites having many circuits and ideas. Ham radio folk were also in good numbers. That was an Innocent and Informative Web, it was heaven.

Tony van Roon VA3AVR has built Circuit Land. This site is as old as the html web internet, means 1995. Earlier it was a part of a Canadian University Site, when i discovered it in late niceties..

Schematics, Hobby Projects, Tesla, Marconi, 555, Metal Detecting, Electronics-Tutorials and a lot more..

Circuit Land – Tony Van Roon

Circuit Land - Tony Van Roon

Highlights –

  • Morse Code Practice Keyer,
  • Constant Current Charger
  • Touch Activated Alarm System
  • Miniature FM Transmitter
  • Continuity Tester, Smart

Tutorials on Photosensitive Devices, Transistor Tutorial, 12 parts, Opamp and Digital Tutors. Compeonet Testing Methods. Basics of Batter Charging, LEDs and Relays too.

This was designed, keeping in mind, that sometimes we have few components available and we could be flat broke. Even that you could not carry your DMM somewhere, but you have to make some instrument for a quick need with what is available. If you are out of cash or feel like Robinson Crusoe, then this is a low cost measurement system. I designed it to practice on eagle, i am not sure how this circuit may work, it is not tested . But i have built, repaired and designed many DMMs. So there is a fair chance, parts of it may work :~)

IC3 LM555 is to generate -5V from 9V. That reminds me of a story, In 1986 while i was studying BE electronics i got a chance to work part-time in a company that sold-serviced imported instruments, it was called trans-marketing. They were the agents for Racal-Dana, Genrad, Data I/O and so many more. Here i came across a Book called CMOS Hot Ideas of Intersil. I had a chance to observe, build and learn some things here. The ICL7107 circuit was the most fascinating, I also read the books of National Semiconductor here.

AVO Multi-Meter

In those days small firms used to make DPM’s digital panel meters with 7107. In 1987 when i got a oppurtunity to design a DPM for a firm, I put the 555 clock in place CD4009 clock shown in intersil, to derive the -5.

Potentiometer Dial GIF for above circuit to be used to make a hand-held avo-meter is here.

Analog Dial AVO Amps-Volts-Ohms meter

Elektronika Jaroslav Belza Projects

DIY electronics projects

LED brightness controler, Electronic dice, USB wire switch, JDM PIC programmer, Precise Low Voltage Power Supply, Electrolytic Capacitor Tester

  • Acoustic tester
  • Electronic pot
  • Rectifier for bar display driver
  • Psofometric filter
  • 4 Channel Voltmeter Nebraska V4
  • Two-colour blinking AC indicator light
  • Electronic load