Search found 1831 matches
- Mon Apr 18, 2005 8:10 pm
- Forum: Events
- Topic: Reading Robot Club 7: Saturday 10th September 2005
- Replies: 115
- Views: 92999
- Sat Apr 16, 2005 9:39 pm
- Forum: Events
- Topic: Reading Robot Club - 16th April
- Replies: 14
- Views: 16064
Thanks for a fun day Simon. RONNY performed consistantly - losing absolutely every contest! The last bout vs MilitAnt resulting in another slice through the CF armour and a punctured and destroyed receiver crystal! The next version of RONNY will feature anti-MilitAnt Kevlar-and-Titanium armour... Ra...
- Sat Apr 16, 2005 9:31 pm
- Forum: Questions (and answers)
- Topic: Sozbots board
- Replies: 5
- Views: 6237
Andrew, you are right not to power your Rx off of 8.4V (or 7.2V or whatever...) - it will thank you for it! You can calculate the stall current of a servo motor by measuring its resistance, then calculating I= V/R. For 500mA at 5V you are looking for a resistance of greater than 10 Ohms. I seem to r...
- Sat Apr 16, 2005 9:19 pm
- Forum: Questions (and answers)
- Topic: Attaching wheels
- Replies: 4
- Views: 6828
If using servos, then the best way is definitely to use the servo horns! (Unless you fancy making your own splined socket - I didn't think so!) I usually glue the wheel to the servo horn, then drill some holes to match the ones in the horn and put some 1mm copper wire through like a staple and fix i...
- Thu Apr 14, 2005 9:46 pm
- Forum: Questions (and answers)
- Topic: Titanium
- Replies: 15
- Views: 16072
- Thu Apr 14, 2005 9:32 pm
- Forum: Questions (and answers)
- Topic: Calculating
- Replies: 3
- Views: 4870
Ian's figures appear correct, but some of the terminology is a bit misleading. DC motors have a constant relationship between speed and voltage: speed / voltage = K (rpm/volt) So speed = K * voltage If you know the speed at a given voltage you can calculate K and then calculate the speed at any volt...
- Thu Apr 14, 2005 9:08 pm
- Forum: Questions (and answers)
- Topic: Detecting and following
- Replies: 2
- Views: 4314
Both ultrasound and infra-red will work, and transducers are available. You're better off directing this sort of question at the RobotBuilder forum - http://www.robotbuilder.co.uk/forum as there are lots of people there that have done this sort of thing. As Simon says, you need two sensors and a con...
- Mon Apr 11, 2005 8:24 pm
- Forum: Questions (and answers)
- Topic: just beginning
- Replies: 6
- Views: 7475
OK, since all the old answers to this question disappeared, here's basically what you need to get started (the conventional way). 27MHz or 40MHz R/C transmitter 27MHz is hard to come by these days, you are better off with 40MHz FM. 40MHz AM is also available, but there's not much of it about , still...
- Sun Apr 10, 2005 9:35 pm
- Forum: Events
- Topic: Reading Robot Club - 16th April
- Replies: 14
- Views: 16064
Reading Robot Club - 16th April
Simon, is the event still on? What's happening? Who's coming? Do you need us to bring any arenas?
- Sun Apr 10, 2005 9:32 pm
- Forum: Antweights
- Topic: New Robots
- Replies: 1516
- Views: 1041214
Servos are used as a relatively cheap source of small motor, gearbox and speed controller. It is possible to build all this yourself and (theoretically) achive better results. Whilst buying motors and speed controllers is not too much of a problem, gearboxes present more of a challenge. You can buy ...