Online shopping for electronic components and circuits
Criagslist is good for selling locally, especially for selling things too big to ship. NEVER take checks or send stuff through the mail for Criagslist transactions. ALWAYS ONLY DEAL IN CASH, IN PERSON.
eBay is reputation based. If somebody cheats someone more than once, they'll find nobody will buy from them.
Alibaba is a lot more wild than eBay. I'm to scared to do any business there, myself. I also don't read Mandarin. It's like a big Asian flee market.
Banggood is another asian flee market site. I've had mixed results from there. I've made maybe half a dozen purchases and only one of them was a ripoff (the item never arrived and I didn't get a refund).
Arduino, real and fake
Chinese shipping -- container ships and cargo aircraft
Static and Current electricity review
RMS, Peak and Peak to peak voltage
Oscilloscopes show a graph of voltage (vertically) vs time (horizontally).
Arduino and Rasberry Pi boards are Open Source hardware and software.
The speed of light (and radio waves, also) is 300,000,000 meters per second.
If something is changing 88,100,000 times each second and you know it is traveling 300,000,000 meters in each second, than you can divide 300 ÷ 88.1 = 3.405221339387 meters for each change. 3.405221 meters is approximately 11 feet and 4 and a half inches.
If I've made any mistakes, please Call me or email Kila or you can call us directly at (707) 413-6435. Here is my main website.