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Category Archives: Uncategorized
Rewiring to streamline reprogramming
Each time I re-program Grisbot, I have to move the ATMega328 microcontroller chip from the robot to the Arduino platform and then back again. It was difficult to pry the chip on and off the breadboard each time because several … Continue reading
Grisbot in Solidoodle
The Solidoodle 3D printer is selling for only $499, which means that it is within my budget. So that got me to thinking that maybe I should abandon laser cutting in acrylic and instead go with 3D printing in ABS … Continue reading
Informal Testing of Potential Ideas
Tonight I tested out a couple ideas for where to go next with Grisbot. On the right, I was working with the good old photocell testbed, which I connected to Arduino analog input A0 and measured the light reflected off … Continue reading
ATTiny44 / Arduino programming pin connections
The MIT High-Low Tech tutorial on using an Arduino board as an ATTiny programmer has a diagram for connecting an Arduino to program an ATTiny45, but not for programming an ATTiny44. So I cross-referenced the corresponding SCK, MISO, and MOSI … Continue reading
Grisbot Light Above Two Demo
Here is a demo video of grisbot performing in ‘Light Above Two’ Mode. This could be the basis of a game, in which the object is to steer the robot as close to a marker as possible within a limited … Continue reading
Light Above 2 User Interface
This is the Scratch-programmed user interface for the second mode for grisbot to obey commands from a flashlight shined from above. When a flashlight is shined on the robot with an intensity greater than user-selected value (a), the robot turns: … Continue reading
Grisbug circuit test
Grisbug is like a hexbug, only with programmed features. It is programmed to blink its eyes when a flashlight shines on it. When the flashlight comes closer, grisbug ‘wakes up’ and the eyes glow continuously and the motor runs. When … Continue reading
Mice Eating Watermelon!
Sammy and Sam Sam eating watermelon. Engineer bloggers are allowed to be off topic if it’s Sunday and if it’s cute.
grisbug instamorph
On Friday morning the bathroom sink plugged up and while looking in the cabinet underneath for the snake, I spied a siphon clip that I had made with instamorph. How fortuitous! I had completely forgotten — Instamorph, of course! Just … Continue reading
Grisbug: first concept
I’m sure everyone is familiar with hexbugs, which are selling for about $6. Well, I’m working on a design for a ‘grisbug’ which will aim for roughly the same price point but have expanded capabilities. I priced the ATTiny at … Continue reading
