I have finally managed to program an ATtiny85 to act as a RC switch! The switch will work as a "poor-man's-ESC-reverse". I bought a cheap ESC for my Ballbot Project and it has no reverse mode, it is made for RC aeroplanes, so I have to implement a relay that acts as a "polarity-switch" to be able to make a reveres motion on the motors.
Nothing special, just two flashing LEDs 🙂
My friend Oscar made a funny-sounding little noise synth with the 555 TARDIS v1.0
I have made two new PCBs, a 16 LED-scanner card and a new version of the 555 TARDIS, looks pretty good I think!
16-LED CYLON/KITT-Scanner v1.0 - front
16-LED CYLON/KITT-Scanner v1.0 - back
Yesterday I finally continued the build of the remote control for fireCrow v2.0. It was quite some time since last I worked with the firing system now so I thought I'd better get cracking!
The remote control box with buttons, one of the two rotary switches,
a key switch (on the short side beneath the red buttons), and a vinyl sticker
If your height gauge on/zero/off button stops working, there's no need to send your tool to a repair man and pay plenty of cash to get it fixed!
Before doing anything you'll need to remove the battery. Then you take a X-Acto knife (or similar) and carefully peel of the ISO sticker on the backside of the tool.
Beneath the sticker you'll find the hidden screws for the plastic hood.
I've been doing a lot of work since last time and there have been some changes in the design as well!
After I assembled a couple of parts in FreeCAD I realized that I had miscalculated (in my head) the size of some of them 🙁
I had to flip the base plate upside down to make room for the steering cradle and remove the friction wheels, because they wouldn't fit anymore. I also had to make the propel wheel larger to get better grip and to make the ball go a bit faster.
The approximate speed is now somewhere about 10 km/h, which is a quite good speed I think.
The base plate front view - with motors and steering craddle and its servo
Another post is up, about the propel system this time!
I have this idea that the ball will be driven with a motor and a small wheel inside a bigger ring, with a friction wheel underneath.
Sorry for my bad sketch
Today I got my first "missing" parts to propel my ball 🙂 I'm going to make a simple and cheap speed controller by using two 30A brushed plane ESC, less than $9 each.
I finally made some schematics for the TARDIS! I also noticed some minor design flaws, mostly aesthetical but no show stoppers! Stay tuned for v2.0 😉
The Schematics are a little bit different than usual. I made them on the top layer PNG of the PCB so it will be easier to see where to put the components.
TARDIS-monostable
TARDIS-astable
TARDIS-frequenzy_divider Continue reading
