 | | Re: Rechargeable Batteries
|
|
(...) We'll have to feed it K'nex's, right? :-) (24 years ago, 10-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
(...) "Definitive Guide" had a sentence or two suggesting rechargeable alkalines. I didn't go into any detail about the tradeoffs, though. I'm still waiting for "Mr. Fusion" :) Dave (24 years ago, 10-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: SALE on Creative Projects with LEGO Mindstorms at Fatbrain!
|
|
I have this book and highly recommend it! Ben did a great job! -Peter "Ben Erwin" <ben@alum.mit.edu> wrote in message news:GC5w3p.DGG@lugnet.com... (...) (24 years ago, 9-Aug-01, to lugnet.books, lugnet.robotics, lugnet.robotics.rcx)
|
| |
| | ECG sensor
|
|
hi all, I've build and ECG sensor for the RCX, so for who is interested: (URL) also want to maintain an overview of avaliable bio-sensors, so if you have or see something interesting, please mail me, you can find the current biosensor-overview: (...) (24 years ago, 8-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
Thanks to everyone who responded to this. As is usually the case on the web there was unanimous consent for ... Only kidding. I haven't yet decided how to go on this. I still have a bunch of alkaline AA's sitting around and with the kids starting (...) (24 years ago, 8-Aug-01, to lugnet.robotics.rcx)
|
| |
| | RCX 2.0 Difference
|
|
I have got both an RCX1.0 and RCX2.0 unit. The RCX2.0 has a much less sensitive IR port. I would use the remote control to send messages and start and stop programs and to trigger motors. With the RCX1.0 the remote could be pointed at the unit and (...) (24 years ago, 7-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
(...) Roger, I believe the low voltage is more important. A side issue is the battery indicator that you access through NQC (or Robolab) set up in a scale of 0-9 volts. Fully charged alkalines are 9+ and discharged ones are 6 volts. With NiMH full (...) (24 years ago, 6-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
(...) They have a higher voltage of about 3V and are tricky to charge, if you don't do it right they have a tendency to explode. I've never seen standalone cells and charger. Jürgen (24 years ago, 6-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
In article <3B69FD3A.3DA7E73A@c...ects.com>, "Frank Caggiano" <caggiano@crystal-objects.com> wrote: I'm surprised no one has mentioned rechargable lithium as used in, e.g., laptops. Rather expensive, but the hold a fair amount of charge. Would they (...) (24 years ago, 5-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
Jerry: What is the problem with the NiMH batteries? the low voltage? Or extra $$ ? Roger (...) (24 years ago, 4-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
(...) I use NiMH and get a voltage between 7.8V freshly charged and 7V at the low end (i.e. slightly higher than NiCd). The lower voltage is not really a problem for me. The motors may be somewhat less powerful, but if you're just playing and not (...) (24 years ago, 4-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: SubVI help screens
|
|
Yes you can create your own help screens, make your own command icon, etc. This is explained in detail in the "Elevator" chapter (Chapter 19) of my book "Creative Projects with LEGO Mindstorms". You can create your own help menu by double-clicking (...) (24 years ago, 4-Aug-01, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
|
| |
| | Re: Specs for Mindstorms gearmotor?
|
|
I have pictures of the inside of the gear motor in chapter 7 of my book, "Creative Projects with LEGO Mindstorms". The motor is geared down by a factor of 13.56 --- 10 tooth to 44 tooth gear, then 12 tooth to 37 tooth gear. 12 tooth gear and 44 (...) (24 years ago, 4-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
Hi Frank; Do you have a 1.0 RCX? If so you can do what I did. I used 3 4.5v battery rods with NiMh (9 total) and a custom wire to power my RCXs. It works great for me because I am using multiple RCXs off one power source (I have removed the RCX AA (...) (24 years ago, 4-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
(...) Nicads have a lower cell voltage (1.2 rather than 1.5), so they won't work very well in the RCX. Personally I use rechargeable alkaline cells (e.g. Ray-o-vac Renewal batteries). The downside to rechargeable alkalines are that they don't have (...) (24 years ago, 3-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Re: Rechargeable Batteries
|
|
(...) Frank, I would *not* use Nicads or NiMH rechargeables. Their full-charge voltage is about 1.25V while alkaline batteries are about 1.55. I have Ray-O-Vac Rechargeable Alkaline batteries. They last several hours of operating time between (...) (24 years ago, 3-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Rechargeable Batteries
|
|
Hello, I'm at the point now where I need to get rechargeable batteries for the RCX. The alkaline's are just now making it anymore. Are Nicads OK or should I go the extra step and get nickel metal hydrides (Ni-MH)? How are radio shack's batteries and (...) (24 years ago, 3-Aug-01, to lugnet.robotics.rcx)
|
| |
| | LEGO mentioned in September issue of Astronomy magazine
|
|
I just got my September 2001 issue of Astronomy magazine and there is a one page article about the LEGO MINDSTORMS Robotics Invention System, Exploration Mars, and Vision Command. Unfortunately, about 40% of the page is taken up by a picture of the (...) (24 years ago, 3-Aug-01, to lugnet.general, lugnet.robotics.rcx)
|
| |
| | Re: Creativity
|
|
IHi Roger, I have been meaning to make this available on the web, but I will try to give a brief explanation in advance. The fuzzy logic line follower that I have worked on also uses two light sensors and rack&pinion steering, but follows a line (...) (24 years ago, 1-Aug-01, to lugnet.robotics.rcx)
|
| |
| | Specs for Mindstorms gearmotor?
|
|
I'm working on a project which requires that I model the dynamics of a DC motor being driven by a PWM controller... specifically, the Mindstorms gearmotor being driven by the RCX. Does anyone know where I might find the spec's for the Lego (...) (24 years ago, 1-Aug-01, to lugnet.robotics.rcx)
|
