Yanno, it strikes me that part of the problem is the whole PWM thing. Does anyone know the protocol for Digital servos? I think it would be a lot simpler if...
21174
barryschrag
Dec 1, 2004 11:27 pm
yummm... code I used the MegaBitty code on the ARC AVR board (at 8Mhz internal I think), and it correctly positions a servo. Thanks! I have had no success...
21175
Dave Hylands
dhylands_99
Dec 1, 2004 11:41 pm
Hi Barry, Did you modify the C code to use Port C? The GeneratePulse routine I provided is hardcoded to use Port D. And oh - yeah - You'll need to configure...
21176
Rich Chandler
mauser712
Dec 1, 2004 11:48 pm
... Some speed controllers choke at the extremes of pulse length. 1ms or 2 ms is just outside of the acceptable range. -- "From Each according to his...
21177
tbrenke@...
trbrenke
Dec 2, 2004 2:45 am
the link I put up was for a single chip that will run 16 servos with simple I2C commands. AND you can order the chip with 3 different addresses for running 48...
21178
barryschrag
Dec 2, 2004 3:36 am
I did change the code to use PortC and it must be configured for output -- since switching the servo from the left port to the right port still allows it to...
21179
barryschrag
Dec 2, 2004 3:39 am
I ran the values from 0 to 255 and there is no detectable output from that ESC. Any idea which end of the range the ESC might want? ... but ... or 2 ms is ......
21180
barryschrag
Dec 2, 2004 3:43 am
This chip sounds ideal for controlling several servos. I only have a need to control the TXT-1 (former Monster R/C truck) at this point. It only has a...
21181
barryschrag
Dec 2, 2004 3:56 am
Ok, a very strange thing is happening. I decided to try this line: DDRC |= (BV( 2 ) | BV( 5 )); and we are rolling! I turned off the ARC board, pulled out...
21182
Larry Barello
lbarello
Dec 2, 2004 6:24 am
The line you added changes the I/O port from an INPUT to an OUTPUT port. WHen it is an INPUT port, writing to the PORT register will switch on/off ~50kohm pull...
21183
Rich Chandler
mauser712
Dec 2, 2004 9:31 am
... Could be a signal strength issue. I know Victors need amplification with certain RC receivers....
21184
barryschrag
Dec 2, 2004 3:19 pm
That makes sense, I had no idea. Thanks! ... port. ... on/off ... the PORT ... Possibly the ... drive vs ... right ... redeployed - ... without ... pins ... ...
21185
Rich Chandler
mauser712
Dec 2, 2004 9:10 pm
... I missed the earlier link, but I looked at this one. That's one slick chip. Pretty expensive though, $17 for the 8 servo version and $21 for the 16 ...
21186
zhoulei545
Dec 3, 2004 12:25 am
hi there, i'm building infrared detection circuits. i wanna use Infrared Emitter 555 circuit from http://www.robotroom.com/Infrared555.html which actually send...
21187
Dave Hylands
dhylands_99
Dec 3, 2004 1:00 am
... The PNA4602 is a good device for doing this. Here's some background: http://www.oricomtech.com/projects/irpd-an.htm This might be inverted from what you...
21188
Lee Leathers
tr3nd42
Dec 3, 2004 4:58 am
Hello, I took you'lls advice and was going to get the EPIC plus programmer... until I found out I might be working with AVR chips as well. What do you'll think...
21189
tbrenke@...
trbrenke
Dec 3, 2004 5:14 am
funny you should say that.... Brian of BDmicro (the mavric) is designing one like this with more features. I do not know when he will have this ready though. ...
21190
ed@...
phoneguin
Dec 3, 2004 6:26 am
I would not consider buying a programmer like this for use on an AVR. All AVR chips are in circuit programmable, so why would you want a programmer that...
21191
Lee Leathers
tr3nd42
Dec 3, 2004 7:49 am
I was looking on olimex's website and saw a PIC programmer for 12bucks http://www.olimex.com/dev/pic-pg2c.html How would the epic or any other programmer be...
21192
gopi@...
Dec 3, 2004 9:53 am
Dear Sirs I would like to read & know about programmable power supplies.Can somebody provide some links on this topic.Thank you Gopi Menon...
21193
Kevin Ross
kevinwross
Dec 3, 2004 4:34 pm
If you are available, we could use a few more volunteers to help out at the FIRST Lego League competition. Your help will be greatly appreciated by 300 ...
21194
Susan M
slmccaina
Dec 4, 2004 4:02 am
We have two Droid sets at co-op. The motor is packaged with the pre-programmed chip of course. Severely limited. The question keeps coming up: can we find...
21195
leo_yuheng_xie
Dec 4, 2004 5:55 am
a robot should be show at 'American Pie 4' check out this site: http://www.drrobot.com...
21196
johnmciv
Dec 4, 2004 5:56 am
I used a small PC104/386 computer in a robot controller project that I did this past year. I wanted to use the 386 to get the color graphic display, mass...
21197
Lee Leathers
tr3nd42
Dec 4, 2004 5:59 am
Hello, i am stumped.. I have a bs2p24 and a mcp23016 that I am using to monitor some Normally open push buttons.. Here is the code: PBScan: PAUSE 18 I2CIN SDA,...
21198
Lee Leathers
tr3nd42
Dec 4, 2004 6:59 am
hmm.. looks like the problem is when I move to bank2 (that is where this code resides).. bank0 has a subroutine that checks the chip once.. then calls the code...
21199
Lee Leathers
tr3nd42
Dec 4, 2004 7:19 am
hmm.. one issue was, bank 2 had the mcp23016's address wrong.. so now, the only problem is back to the IF loops not being satisfied by datagp1 or datagp0... I...
21200
Martin Sondergaard
martinsonder...
Dec 4, 2004 2:00 pm
None of the "if" statements check for "11111111";. They check for many possible numbers, but not that one. Could that be the problem? -- Martin Sondergaard....
21201
Jeffrey Birt
jeff_birt2000
Dec 4, 2004 3:06 pm
I've been designing a bot to use a Mini-ITX board. The lack of I/O is a big concern. Via's new T (or TC don't remember) board has built in I2C as well as the...
21202
andyolney
Dec 4, 2004 5:33 pm
I have been watching the progress of this USB box at the yahoo group "geckodrive" designed for the machine tool crowd. The current specification, while...
