 | | RE: persistent var's in IC
|
|
I had a similar problem using the freeware IC and I found that things like the position in the code at which the persistent array was initialised made a difference. Eg put the initialisation of the array right at the beginning of your code, this (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Question for Fred
|
|
Hi Fred I have question for you. I have to control a position using the miniborad or the handyboard. And I don't know which motors is good the DC servo motor or the stepper motor and whats the diffrence? Another question if you don't mind, have you (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | DC Motor movement
|
|
hi, The following command will cause the DC motor to rotote one after other according to the std lib and the command. hence, the robot will gradually slanted. It cannot travelled in a straight. motor (2, 100); motor (3,100); My question : how to (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Newbie Questions, Problems & Contributions...
|
|
Hi, I have few newbie questions, and a contribution to make... Background info: ---...--- I have been playing with my HB for a week now, using the free IC 2.850 under NTServer4.0... So far, Ive been sucessfully able to control DC motors, send (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Where i can buy?
|
|
I try to buy the flash ram type NM29A040 or TC58A040. Or another type of serial ram eeprom for my HB. But i don't know where i can find,buy it. Does anyone know who sell on-line, this IC's. Thank Fede. E-mail: fedsante@tin.it (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | RE: Question for Fred
|
|
That's a funny question. I just finished a class on this exact topic. The basic determining factors when deciding whether to use a stepper motor or a DC brush/less servo motor is speed and open/closed loop control. Stepper motors are limited to (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Do It Yourself RF module????
|
|
Hi, Now that the topic of RF commucation seems to arise again, I have a question too. After looking at the RF modules of radiometrix and linx I concluded that: 1. They are too expensive 2. They are probably not available here in the netherlands (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | RE: Help with overcharged batteries
|
|
<<Last night we discovered that we had left our Handyboard on ZAP when we thought <<we had left it to trickle. It was left at this condition for about 6 hours. You probably should remove the battery pack, put it in a baggie, and take it to Radio (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | RE: Serial interface/ RF data link
|
|
<<snip>> Unfortunately, I have not had any luck. This brings me back to the first point- is it possible to use the serial interface board by just providing the tx and rx lines? <<snip>> In short, no. The serial interface board takes power from the (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | persistent var's in IC
|
|
Has anyone had problames with the Handyboard, IC 3.2 and 'persistent' variables? the following declaration works fine : persistent float i; but using an array: persistent float battery_voltage[ 320 ]; always causes an error while downloading : IC> (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Re: Serial interface/ RF data link
|
|
To properly comunicate with any PC you need to convert your TTL TX and TTL RX signals coming from the Handy Board to RS232 voltage levels. The charging board contains this interface IC called the "MAX232" The power wire is required unless you are (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Help with overcharged batteries
|
|
Last night we discovered that we had left our Handyboard on ZAP when we thought we had left it to trickle. It was left at this condition for about 6 hours. This morning the motors are running very sluggish. Are our Handyboard or its batteries (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Serial Interface/ RF data link
|
|
Sorry, the kit is from LINX Technologies (not LYNX) <A HREF="(URL)Linx Technologies -- Products</A> (URL) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Serial interface/ RF data link
|
|
Let's say I want to use a serial interface board without the "charger", as the one provided with the Handyboard kit. The Tx and Rx lines are obviously required, but what about the ground and power lines?... Speaking of "easy to interface" data link (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | RE: expand memory HB
|
|
I'm running IC 3.2 and am curious why this fails : #define HOURS 10.0 /* hours of logging */ #define INTERVAL 5.0 /* minutes between samples */ #define SAMPLES ( (60/INTERVAL)*HOURS + 1 ) float battery_voltage[ SAMPLES ]; the message on download is (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | expand memory HB
|
|
Hi. I have a question, i want to build a Datalogger with my Handyboard. How can i simply expand the data memory, i need at least 128Kbytes of memory. Thank. Federico Santello E-mail:fedsante@tin.it (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Re: start_process() questions
|
|
(...) Yes. The subroutine acts just like any other function that you call. (...) Once you do a start_process, that subroutine will run indepently and concurrently with your main program. It does not "run out of time"... it will continue to run until (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | Re: two way radio question and data link
|
|
Details on Radio Data Modules as follows: I have called ABACOM Technologies --new phone # (416) 236 3858) and this is probably your best bet for voice or data use. Data & prices are from Circuit Cellar Ink magazine TRANSMITTER * 30 x 10 x 5mm * (...) (26 years ago, 7-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | start_process() questions
|
|
Hi, I'm using start_process() to run a set of processes. My questions() are: 1. does start_process() re-initailize all the called process's (local) variables every time it calls the process? 2. If the process does not complete before its alloted (...) (26 years ago, 7-Dec-98, to lugnet.robotics.handyboard)
|
| |
| | SPO 256
|
|
F.Y.I. B.G. Micro no longer is selling the Text to speech IC "CTS256A-AL2" they only have the SPO256 IC in stock. This was confirmed by B.G. Micro on 12/07/98. According to a few people they still sold them as pairs as of 08/98 If anybody else is (...) (26 years ago, 7-Dec-98, to lugnet.robotics.handyboard)
|
