How to build a Makeblock Bluetooth/WiFi Cellbot car

Ingredients: – LG Optimus Dynamic – PC game controller (joystick) – pygame for joystick input – python script runs on PC to translate joystick input to movement commands – SL4A to send movement commands from PC to smartphone over WiFi – smartphone sends movement commands to Arduino via Bluetooth (also SL4A) – Arduino translates commands […]

LG Optimus Dynamic – perfect cellbot phone?

It is the cheapest, full-featured Android phone that I’ve found. Only $20 on Amazon NEW. It feels like finding hidden treasure because the only reason it’s so cheap is that the phone is targeted for the bottom market. And, normal people who buy the phone later add minutes to use it as a phone. But […]

Robot Kit – Day 7

Our new ultrasonic car + IR code seems to work well, even in the living room. You only wanted to switch to MAX SPEED to watch it go nuts: We made an interesting discovery: mama’s fuzzy bunny slippers are invisible to the ultrasonic sensor. I tried to demonstrate why by bouncing some balls off different […]

Robot Kit – Day Six (“What’s that sound downstairs?”)

What’s that sound coming from downstairs? “I want his name to still be Bawa.” Bonus: The mailman brought gifts! An 8-pack of Eneloops and one fast charger. I got that charger because it has a DC 12V input, which can be driven by cigarette lighter sockets and a foldable solar panel I’ve been thinking of […]