 | | Re: Video Transmitters
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NetMarket (www.netmarket.com) carries a transmit/receive pair made by Recoton. It's intended to transmit audio/video around the house. Ours includes a gizmo to extend your remote control capabilities, and it cost about $120. Just the (...) (25 years ago, 14-Nov-99, to lugnet.robotics.handyboard)
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| | Re: mixing variable types in IC
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[Ben Davis] spake unto the ether: (...) Hmm, I think you want c = ((float)(x))/((float)(y)); Otherwise, the division will be done first as integers, giving an integer quotient, which you're then turning into a float. *Rich* (25 years ago, 14-Nov-99, to lugnet.robotics.handyboard)
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| | mixing variable types in IC
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Hi John- You can convert quantities from one data type to another (it's called "casting", I believe). The following computes the quantity x/y, then converts it to a float: ---...--- int x, y; float c; float divide ( int x, int y) { c = (float) (...) (25 years ago, 14-Nov-99, to lugnet.robotics.handyboard)
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| | mixing variable types in IC
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Now that I got past my nested function problem I have discovered that IC does not like mixing variable types. For instance, this results in an error: int x, y; float c; float divide ( int x, int y) { c = (x/y); return c; } IC will not let me (...) (25 years ago, 14-Nov-99, to lugnet.robotics.handyboard)
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| | Re: Video Transmitters
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[glashan] spake unto the ether: (...) JDR Microdevices ((URL) sells a $25 short-range VHF TV transmitter kit. It's all analog, so there is some drift with warmup and it needs a very stable power supply, but otherwise it works great. The observer (...) (25 years ago, 14-Nov-99, to lugnet.robotics.handyboard)
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| | Video Transmitters
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Hi all I wonder if anyone out there can help me with this: Im looking for a cheap video transmitter or circuit diagram. Ive got a small board camera on my bot and I need to find some way of sending the video to my TV. I dont want to go out and spend (...) (25 years ago, 14-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition - understand now, Thanks
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Sorry, Forgot to enclose the code. what is wrong here? long time; void phony() { while (digital(2) == 1) { time = mseconds(); printf("%d\n", mseconds()); } if (mseconds () >1413 ) fd(1); else bk(1); } void start() { phony(); } void main() { while(1) (...) (25 years ago, 13-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition - understand now, Thanks
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John, Have been following your problems with function definition. what is wrong with this code? It will print the mseconds but the if statement does not work. Thanks Terry -----Original Message----- From: John Bachman <bachman@anatek.mv.com> To: (...) (25 years ago, 13-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition - understand now, Thanks
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Rich got it. Nested functions was the problem. I don't recall seeing that discussed in the IC manual and I think it is OK in C. Nonetheless, thanks to all for helping this hapless programmer. John (...) (25 years ago, 13-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition
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(...) whoa! Local function definitions. Even GCC doesn't grok that. Try extracting the function definition phony() from start() like so: long time; void phony() { while (digital(2) == 1) { time = mseconds(); } } void start() { phony(); } -d (...) (25 years ago, 13-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition
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[John Bachman] spake unto the ether: (...) You have the definition of phony() nested inside the definition of start(). I don't know what ANSI C and/or C++ let you do, but this is invalid IC. You need something like: long time; void start() { (...) (25 years ago, 13-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition
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Thanks for all the helpful device but the darned thing still does not work. I have created a simplified program to try to figure out what I am doing wrong. Here it is: /* A simplified program to figure out what is wrong */ long time; void start() { (...) (25 years ago, 13-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition
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John: If your function does not need a parameter passed to it just do: void detect_time2() { /* code here */ } just like int main() { /* code here */ } Bart. ___...___ Reply Separator ___...___ Subject: IC trouble - function definition Author: (...) (25 years ago, 12-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IC trouble - function definition
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John: Try it like this----- void detect_time_2() {same code here;} IC is a lot like ANSI C, but there are some differences. Good luck, Gary Livick (...) (25 years ago, 12-Nov-99, to lugnet.robotics.handyboard)
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| | IC trouble - function definition
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I am having trouble with function definitions. Can someone tell me what is wrong with this: void detect_time_2 (void) { code here;} I get a syntax error on the definition line and cannot figure out why. TIA John (25 years ago, 12-Nov-99, to lugnet.robotics.handyboard)
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| | RE: pneumatics and compressed air cartridges
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check (URL) Look under spare parts for Pneumatic products Kalyan -----Original Message----- From: Chen Yung Hsu [mailto:hsu3@cooper.edu] Sent: Thursday, November 11, 1999 4:23 PM To: handyboard@media.mit.edu Subject: Re: pneumatics and compressed (...) (25 years ago, 12-Nov-99, to lugnet.robotics.handyboard)
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| | Re: pneumatics and compressed air cartridges
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You may find some help by joining the legged robot email list. There have been several discussions on this topic. Send an email to: legged-robots-subscr...groups.com and it will send you information and instructions to join. Then simply send your (...) (25 years ago, 12-Nov-99, to lugnet.robotics.handyboard)
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| | Re: pneumatics and compressed air cartridges
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Chen, I just received catalogs from Clippard Minimatic Co. Looks like just what you are looking for. http//www.clippard.com bye Terry -----Original Message----- From: Chen Yung Hsu <hsu3@cooper.edu> To: handyboard@media.mit.edu (...) (25 years ago, 12-Nov-99, to lugnet.robotics.handyboard)
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| | Robot for sale
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I have a General Robotics RB5X I'd like to sale for $1000, it was just refurbished by General Robotics a year ago at a costs of $1200. I know this doesn't have anything to do with Hand Boards but I thought maybe someone from the mailing list would (...) (25 years ago, 12-Nov-99, to lugnet.robotics.handyboard)
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| | Re: pneumatics and compressed air cartridges
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Hi! I was wondering if anyone can help me. I'm looking for light weight, miniature pneumatic actuators, solenoid valves, and compressed air cartridges. Does anyone know any companies that sell these? Also, does anyone have any experience utilizing (...) (25 years ago, 11-Nov-99, to lugnet.robotics.handyboard)
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