Category Archives: Deal

Problems with cheap electronics on Ebay

I have an electric scooter project that has been on and off again for a while now, I get to it when I can when it’s not cooking or freezing in the garage.  The scooter runs on six 12V batteries for a total traction voltage of  60V, the lights/horn/blinkers/etc all run on 12v which requires a 60v to 12v DC/DC converter.  I found a cheap 72v to 12v converter on Ebay from a manufacturing company in China (similar to this one) and figured I would spend the $30 and see how it performed.  Well what I got in the mail wasn’t a DC/DC converter, but a 24v electric bicycle controller for a brushless DC motor.  The interesting thing is the mailing envelope had “Motor controller” on it and not “DC/DC converter”.  Here’s the new rule, you get what you pay for.  Because I’m sure sending a $30 unit back to China is going to be more trouble than it’s worth, I think I am going to keep the controller and maybe make an electric bike some day…if I can figure out the non-documented pin out of the thing!

Cheap electronics, wrong part sent from China

ESP8266 boards are in, time for a project

Oooh yeah I got 3 ESP8266 WiFi boards in the mail today from SeeedStudios.  Now lets make a project!  For those that don’t know the ESP8266 is a WiFi to serial board that is only $5-$6 USD.  Apparently the board does all the WiFi and ethernet stuff, so all your project has to do is some basic setup and then RX and TX.  I’ll be reporting on how easy this is here and posting any projects as well as code for microcontrollers.

Got my esp8266 boards today