Let's Make Robots!

high

T'REX controller now available from Sparkfun

Good news for anyone wanting to control big motors up to 24V with stall currents as high as 40A. The T'REX robot controller is now available from Sparkfun.

https://www.sparkfun.com/products/12075

The controller is basically an Arduino Nano 328 with a switchmode power supply and high current motor drivers with electronic braking and current monitoring.

High Speed Photography Help!

Hello everyone!

this is my first post so im pretty excited haha.

i want to know how to create something so i can shoot high speed photography.

an example of what i would like to do is of a water droplet hitting a bowl of water and snapping a picture when the "crown" (part of the water which gets drawn up from the result of disrupting the water bowl".

i was thinking about a laser activated "flash" which fires the flash of the camera after the beam is broken, but it should have a delay so i can fine tune it and get the perfect image.

High Low problem

We built the easy robot as per the instructions at the Home page.  Programmed it etc, worked fine, very happy.  We used the example program where he rolls about using his IR sensor to avoid obstacles.  Then we got a little creative and added an LED.  Only problem is the command HIGH turns the LED off and the command LOW turns the LED on.

Motor drivers?

Does anyone know of high current ( 2.5 Amps per motor) motor drivers which are compatible with Picaxe AND PWM? I need to drive 2 motors.

Coil Gun Rifle

I have been making soem good progress on the Coil Gun Rifle:

CoilGunRifle.jpgCoilGunRifle_2.jpg

 

Larger images in attachments.