Search found 4 matches

by MarcMiller
Mon Jan 20, 2003 8:20 am
Forum: General Discussion
Topic: is there a tree of knowldege for the woefully ignorant s
Replies: 8
Views: 2233

Re: is there a tree of knowldege for the woefully ignorant s

As far as project with your son I would suggest some of the robot kits from a source like Robot Store My son is 10 and we have done many of the kits. He still has fond memories of building his solar racer when he was 7. Some of the kits have the electronics preassembled and all you need is a screwdr...
by MarcMiller
Wed Dec 18, 2002 7:32 am
Forum: General Discussion
Topic: Hollywood tracker beacon?
Replies: 9
Views: 2563

Re: Hollywood tracker beacon?

A more advanced tracking device would sit in a low power mode and just be a receiver until a modulated signal is received and then respond with a know signal/tone/data. This would reduce power draw on the tracking device and also not violate FCC regs as it would not be a transmitter unless pinged.
by MarcMiller
Fri Oct 18, 2002 9:42 am
Forum: Robotics
Topic: Brain kit
Replies: 18
Views: 9426

Re: Brain kit

This was a very interesting thread. From first looking at it it seems like you have some low level beam electronic building blocks. Some stimilus/response building nodes. Interesting but to be useable it would utilize quite a few of these to get a fairly decent reaction that is useful. You could mos...
by MarcMiller
Fri Oct 18, 2002 9:22 am
Forum: Robotics
Topic: Hacking old 5 1/4" Floppy drive servo (spindle) mot
Replies: 1
Views: 2017

Re: Hacking old 5 1/4" Floppy drive servo (spindle) mot

I would either pulse the motor_on pin on the floppy or tie it high and use an H-Bridge to pulse the 12V power. That should give you variable speed depending on the pulse width.