Search:

Thanks for the heads-up Erco. I ordered one today (1-12) so it looks like they still have some in stock at the reduced price. Looking forward to playing with my new S2!

I know the S2 is really new and people are just getting them, but I'm wondering if anyone has messed with the hacker port yet. I'm curious about the expansion possibilities and adding new sensors,...

Awesome video! Thanks for posting the link. I think I've seen some of that footage before but it was a much lower quality clip. The Wrights are some of my personal heroes. Both the Fred Kelly or Tom...

OBC,

What's the threshold on whether or not we should request table space? I have a couple of hobby-level projects I'd like to bring but I don't know if they warrant requesting a table. I wouldn't...

Two things I'd really like to see are more RF module options for microcontroller communications applications, and a Propeller-based version of the Penguin robot.

Good deal! I love the SpinStamp and·it's great to pick up another one·at half-price.·I've used·mine in a couple of small robotics projects. Thanks Parallax!

Chris,

Thanks for the update, I was just curious. I'll have to check into the cause further at some point. I can probably just add a command to turn the LCD on somewhere in the main code loop...

Chris,

On a related note - does the backlight eventually turn off if not "refreshed" by a software command to keep it on? I have one project with a 2x16 LCD running 24/7 and I noticed that the...

Oops! The sale price was so low that it short-circuited my reading comprehension circuits. Now I only feel slightly bad about missing out on the PPDB scratch & dent sale... =)

I'm starting to feel like a chump for playing full price for a PPDB... =(

Chris,

Thanks. I sent tech support an e-mail this morning detailing my problems.

Mike

Chris,

I checked my custom board with a meter just to make sure it was +5VDC and that the ground was ok. I didn't know about the blinking rate, thanks for the info. My unit just can't get a lock...

Chris,

One other weird thing is that it seems like the GPS LED is blinking at different rates. Normally it flashes once per second when it's waiting for lock but I just noticed that when I move it...

Chris,

My robot has a custom board, but power to the GPS comes from a +5VDC regulated circuit (fed by a 7.2V battery). I've also tried it from a BOE, connecting it to the servo header blocks with...

Hi,

I am wondering if anyone else has had any problems with the Parallax GPS module and can offer some advice. I have one that has been working fine for months on a robot but now just will not...

Stefan - Right! Now I totally understand why objects have the start/stop methods. I was trying to keep my little test program simple and ended up working myself right into a corner.

Jim - Thanks...

Mike,

Thanks, I didn't know about that restriction on COGNEW/COGINIT. That's probably why nothing was working for me in this case.

The code was just something I was playing around with....

Hello,

I'm playing around with the following test code:



CON
_clkmode = xtal1 + pll16x 'set for PROTOBOARD!!
_xinfreq = 5_000_000
TermRX = 31 'Prop plug...

Erco,

Wow, those sound like pretty interesting relays. They must be discontinued, I can't find them stocked at any of the usual vendors. Too bad, but I'll keep my eyes open for some surplus!
...

Jeff,

I haven't tried using a hex inverter, but I can't think of a reason why it wouldn't work. I just used the transistor circuit because I could make it really quickly out of parts I had in my...

Robot Room also has instructions for a "classic" bipolar H-bridge here:

www.robotroom.com/BipolarHBridge.html

I'd also recommend Mr. Cook's excellent "Intermediate Robot Building" book. There...

Jeff,

I think I tried the software adjustment·and it didn't work, but I can't remember exactly why. My notebook from that project got lost in a move.·Hopefully you'll have better luck. I was able...

Jeff,

I'm not sure about the 4x20 LCD, but I had a similar problem with the Parallax 2x16 LCD and I would bet it's the same situation. If I remember the details correctly, the serial out from the...

I second the David Cook books, particularly "Intermediate Robot Building" for some great practical advice on motor drivers, sensors and mechanics as used on small BOE-bot sized robots. They are...

Chaz,

Check out the diydrones.com website. There are some BS2 autopilots described on there that might be a good starting point for you. I believe one author used a BS2p for a basic GPS waypoint...