Many thanks to all of you who have sent along suggestions for getting the stamp to talk to the SitePlayer - I spent some time with the system over the weekend...
2124
joan24es
Apr 1, 2002 7:28 pm
Could some member of the group post the electronic drawing of a relay interfaced to a SP through a transistor ? I designed such an interface with a NPN...
2125
Michael Gerstweiler
pribusin
Apr 1, 2002 8:20 pm
Joan, Looking at the SP schematic, it seems the I/O lines are open collector, i.e.. sinking inputs. They can sink a 5V signal to GND but they cannot supply a...
2126
joan24es
Apr 1, 2002 9:17 pm
Michael, According to 89c51 datasheet, port1 (which is the one available for user use in SP) is a "8 bit bidirectional I/O port with internal pull-ups". Where...
2127
Tom Becker
b19063
Apr 1, 2002 9:42 pm
... the Gate of the FET to 5V with a large resistor, say 2K. This essentially turns the FET (& relay) on when the output is inactive (off). Why wouldn't a...
2128
Michael Gerstweiler
pribusin
Apr 1, 2002 9:53 pm
Of course that would work too. I guess I'm just used to driving 24V relays where the load is at +24V and the FET pulls the coil to 0V with a 5V TTL signal at...
2129
Kevin H Kamel
kamelkev
Apr 1, 2002 9:57 pm
... Not to sound like a total idiot, but what exactly does this mean? "sinking inputs". Do you mean that the pins cannot supply current *at all*? and therefor...
2130
Kevin H Kamel
kamelkev
Apr 1, 2002 9:58 pm
... Yeah I had wanted to do this with a 2222 but I just haven't gotten around to it yet... Has anyone actually done it already and have it working? Im...
2131
Kevin J. Maciunas
kevin_maciunas
Apr 2, 2002 12:28 am
On Tue, 2002-04-02 at 07:27, Kevin H Kamel wrote: Not to sound like a total idiot, but what exactly does this mean? "sinking inputs". Do you mean that the pins...
2132
Lance Beck
ltbeck2000
Apr 2, 2002 12:39 am
An easy and pretty cheap devise for relay control is the ULN2003 (Harris or NSC, I think). You can do 7 of them with this device. Put a 10k pull-up on the...
2133
rkward
Apr 2, 2002 1:57 am
Chris, The interface board sounds great, maybe even better as a kit! How would you expect it to be priced and what are the dimensions? Could you post a picture...
2134
jan axelson
janaxelson2
Apr 2, 2002 4:43 pm
A CGI program should be able to do this. Here is one source of info: http://hoohoo.ncsa.uiuc.edu/cgi/overview.html Jan Axelson http://www.lvr.com jan@......
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joan24es
Apr 2, 2002 8:32 pm
Lance, This is a good suggestion. I was looking in my RS and Farnell catalogues at optocouplers but most of them cannot drive a current high enough for some...
2136
joan24es
Apr 2, 2002 8:39 pm
Tom, After finding in the Net the electronic features of port 1 in 89c51 this is what I thought that should work. Anyway, thanks for the idea ! Joan P.S. Joan...
2137
Tom Becker
b19063
Apr 2, 2002 9:13 pm
... I am now more wise. My most humblest of apologies, sir. My unfortunate incorrect assumption was based on an American name stereotype. Tom Becker --......
2138
joan24es
Apr 2, 2002 11:05 pm
Tom, 1- Don't worry. I am used to this sort of confusion. BTW : catalan is spoken only by 6 million people. It is perfectly normal, thus, that you ignore its...
2139
Kevin H Kamel
kamelkev
Apr 2, 2002 11:24 pm
I want further details! :)...
2140
Kheng-Teong Goh
carboncopy79
Apr 3, 2002 2:12 am
... Firstly check page 11 of SitePlayer Software Manual Rev. 0014A. It tells you how to calculate the code for the baud rate that you wish. According to the...
2141
Dave Bodnar
n3enm
Apr 3, 2002 10:45 am
Thanks for the tips.... I have tried what you suggested with little success and still am amazed that there is no simple way to easily change the default baud...
2142
joan24es
Apr 3, 2002 12:12 pm
Dear all, SP can send UDP messages. Now the question is : does there exist some commercial program that could catch up these messages ? Thankx Joan...
2143
joan24es
Apr 3, 2002 12:14 pm
I will prepare a pdf file with some details more. Give me one or two days ... Thanks Joan ... thousands ... successfully ... http://docs.yahoo.com/info/terms/...
2144
joan24es
Apr 3, 2002 12:15 pm
I will prepare a pdf file with some details more. Give me one or two days ... Thanks Joan ... thousands ... successfully ... http://docs.yahoo.com/info/terms/...
2145
Ken Campbell
thetoasterboy
Apr 3, 2002 2:31 pm
Hello Dave, DB> success and still am amazed that there is no simple way to easily change DB> the default baud rate from 9600 without going through some sort of...
2146
mfoster
Apr 3, 2002 3:58 pm
Hi! I'd like to create a SitePlayer webpage that shows the last 'N' visitors to the SitePlayer itself. Can anyone recommend a starting point for such a page?...
2147
Ken Campbell
thetoasterboy
Apr 3, 2002 4:26 pm
Hello mfoster, m> I'd like to create a SitePlayer webpage that shows the last 'N' m> visitors to the SitePlayer itself. Can anyone recommend a starting m>...
2148
mfoster
Apr 3, 2002 5:41 pm
Hi, Ken! I'd still prefer to do it on the SitePlayer, if possible, but thank you for the great idea! If I can't come up with an internal solution, I could...
2149
Ken Campbell
thetoasterboy
Apr 3, 2002 7:06 pm
Hello Mark, m> I'd still prefer to do it on the SitePlayer, if possible, but thank Sorry, but you won't be able to implement it on the Siteplayer alone....
2150
ripper1_1
Apr 4, 2002 2:33 pm
The Siteplayer UDP send tester program will catch em. I am also in the process of writing a C++ program to do the same - I should have it done by next week +...
2151
ripper1_1
Apr 4, 2002 2:33 pm
The Siteplayer UDP send tester program will catch em. I am also in the process of writing a C++ program to do the same - I should have it done by next week +...
2152
ripper1_1
Apr 4, 2002 2:33 pm
The Siteplayer UDP send tester program will catch em. I am also in the process of writing a C++ program to do the same - I should have it done by next week +...
