A group of test engineers in Thailand who worked in an Electronic factory more than 12 years have started a small business to sell electronic projects and electronic kits worldwide in 2007.
CH012 Transistor Curve Tracer adapter XY Oscilloscopes 2 ranges Bias
Some interesting kits are HHO High Frequency PWM DC Motor Speed Controller 30A, CH018 Cycling Timer 1.5 -180 minutes ON-OFF 12VDC/30A Heavy Duty 110V/240VAC, CH024 ICL8038 Function Generator Sine Triagle Square wave 0.5Hz-100kHz.
5/16 Moo 18 ,Bueng Kham Phroi,Lam Luk Ka, Pathum Thani 12150, Thailand
The Electronics section of Changpuak maintained by a Teacher of Thailand, Alexander C. Frank, has calculation tools for electronic circuits as well as some electronic projects like power supplies, signal generators and curve tracers too .
Among others they also have Amplifier Design, Antenna and Filter Designer AF and RF and Basic Electronics Tutors.
Homebrew Projects – Laboratory of Changpuak
A Geiger-Müller tube consists of a tube filled with a low-pressure (~0.1 Atm) inert gas. (Helium, Neon, Argon,…). The GM-Tube has a coaxial shape, where the inner conductor (Anode) is biased with a high voltage (~500V) relative to the outer conductor (Cathode). The Tube has a window (left side) made of mica.
This GM-Counter is build on 2 PCB’s. One is a standard high Voltage generating circuit, whilst the second is a Counter based on an ATMega16™ which also handles serial Communication with a host (Environmental Control).
Homebrew Geiger Müller Counter
This website conserves all those nifty little mini-projects (gadgets) which were developed to enhance the doctoral hats of our “fresh” doctors.
Doctoral hat electronics – After seeing this section i am convinced that the next innovation will be “SmartHat”. There is ample space in a cap for an Advanced Android Multimedia Gadget with a Hepta Core ARM chip and all the works. Rush to the patent office !