Let's Make Robots!

I wish to make complex project X with W, Y and Z features. How do I do it?

WARNING: This project is only a mock-up project intended to help convey to the proper perception of how difficult or reasonable some random project X might be to take on. My target audience for this post is mostly impressionable, clueless youths (and I mean no disrespect), also people lacking method, common sense and/or social convention might benefit from it.

The PLOT:

r0b0t_n00b -> This will be our fictional generic character representing someone new to the world of robotics.

Beware: Your 3D printer might be trying to kill you

 

Well, here is some scientific support (see attached pdf) to why your 3D printer might try to at very least harm you!

The study only incides over particle emission, and not the chemical nature of the emitted particles and yet it can be scary enough. That, added with my reported symptons after going on a 3D (ABS) printing binge: persistant chest pains/disconfort should be enough to keep you on your toes.

 

So you better ventilate/filtrate if you're into this messy business.

Optimized voltage divider for low power application?

Well, I'm (trying) to build a low power node which is powered by a tiny 80mAh NiMH battery pack which in turn is recharged (kept charged) by a small photovoltaic panel.

I want to measure the voltages at both panel and battery, so I'm thinking of using a couple of voltage dividers. Usually I wouldn't think too much on it and would just use a couple of resistors, that would divide the max Vin to the voltage at which my chip would be running. 

In this case I intend to run an Atmega8 (if everything fits -- else atmega328p) at 3.3V...

Children of the corn... and... ahem petroleum too

Well, finally the Makibox is supposed to start production this week. Meanwhile I can just stare at this:

while I wait for my order to be produced and shipped :P

Yup, I just couldn't help myself and got a roll of ABS and another of PLA :|

Boobies... perhaps not what you were expecting

Here I bring you guys a bitter-sweet videoclip for song I think you guys should see and hear.

BEFORE anyone starts to FRET... worry not I can assure it is wife (actually the wives should see it too) and kid friendly, and if you by some reason disagree after seeing it... well, then I pity you... if you disagree BEFORE seeing it I pity you even MORE.

Moving on... this video might bring about a range of opposing emotions (within its length and for any given person), but well see and hear (LISTEN) for yourselves.

 

じゃまた 

\o

 

Low-power remote power-independent (solar charged) sensor node!

Well, for a while now I've been entertaining the idea of building a remote sensor node to keep track/record of my indoors "balcony orchard".

This project here will be my starting point, a Low-Power Wireless Sensor Node where most of the work is already cut out for me.

It's power consumptions are reported to be:

Sleep Consumption 0.14 mA

[solved...sort of... works... far from perfect] How to properly control (arm+calibrate+command) an HK-20 ESC with arduino?

--- Solution ---

UPDATE: The below solution is NOT 100% reliable, sometimes I have to repeat the 90-10-20 process quite a few times up until I have a proper the ESC properly armed/calibrated. And when I say a few times I mean up to quite a few minutes with battery unplug/re-plug in-between. But now that the craft is mostly finished (I probably just need to tweak the aft side of the skirt), I'll revise my code yet again and see what I can do about it.

[SOLVED***] int values "transformed" over wireless data sent, why?

*** Solved here means the problem disappeared after applying some brute OCD copy/paste/merge code. Exact origin of it? Well I choose not to dwell on it.

 

Well, while developing my remote control/receiver node all was well when unidirectional communication... and then I decided to add bidirectionality in order to get back feedback/telemetric data.

I'm using RF24L01+ radio modules and the RF24 library to handle them.

The Remote Control sends a struct with X & Y integer values and an array of booleans corresponding to button pushes.

Happy 2013 LMR!

Cheers to the New Year!

 

Have a good one dear buddies at LMR!

Too high voltage drops across different TIP-based motor drivers?

So, I needed to drive a couple of mystery motors I've harvest from a "electric shaving kit". I had a big motor, extracted from the electric razor and a tiny motor extracted from the nose pliers.

My needs:

big motor -- drive it one way; small motor -- drive it both directions

Case 1: Handling the big motor