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MAK Maxi 2000 (Elmak) - is compatible with JP1?

 
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jzef



Joined: 14 Sep 2021
Posts: 20

                    
PostPosted: Sun Sep 26, 2021 5:12 pm    Post subject: MAK Maxi 2000 (Elmak) - is compatible with JP1? Reply with quote

I have an old MAK Maxi 2000 universal remote control. There is some 7-pin connector on the PCB. There is also an AT45DB011-SC SPI chip. I checked the pins with a meter:
http://www.hifi-remote.com/forums/dload.php?action=file&file_id=26380
http://www.hifi-remote.com/forums/dload.php?action=file&file_id=26381

If I connect the RXD pin of the USB-TTL converter to SO and the GND mass, then in the SerialWatcher program I have some data when pressing the buttons on the remote control:
http://www.hifi-remote.com/forums/dload.php?action=file&file_id=26382
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The Robman
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Joined: 01 Aug 2003
Posts: 21210
Location: Chicago, IL

                    
PostPosted: Sun Sep 26, 2021 6:15 pm    Post subject: Reply with quote

The files posted are all images, so here are the images:







For info on how to post images:
http://www.hifi-remote.com/forums/viewtopic.php?t=6557
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Rob
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Please don't PM me with remote questions, post them in the forums so all the experts can help!
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jzef



Joined: 14 Sep 2021
Posts: 20

                    
PostPosted: Thu Sep 30, 2021 7:33 am    Post subject: RTS line in JP1 remote Reply with quote

What is the RTS line voltage? I have a universal remote control, but without user manual and without pin markings on the PCB. I want to check with the DT830 multi-meter.
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jzef



Joined: 14 Sep 2021
Posts: 20

                    
PostPosted: Thu Sep 30, 2021 8:21 am    Post subject: Reply with quote

I have such voltage on the pins in my remote control:
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jzef



Joined: 14 Sep 2021
Posts: 20

                    
PostPosted: Thu Sep 30, 2021 12:27 pm    Post subject: Reply with quote

Remote have 28-pin chip EL-2000. With such a connection of the remote control to the USB-TTL converter, after clicking the Download button in the RMIR program, the diode on the remote is blinking:

RTS - 1
TXD - 3
RXD - 4
GND - 7

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mathdon
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Joined: 22 Jul 2008
Posts: 4515
Location: Cambridge, UK

                    
PostPosted: Fri Oct 01, 2021 4:06 am    Post subject: Reply with quote

jzef wrote:
What is the RTS line voltage? I have a universal remote control, but without user manual and without pin markings on the PCB. I want to check with the DT830 multi-meter.

I'm not sure what you are trying to achieve with your multimeter, but the nominal voltage of all output pins is 3.0v and input pins normally have a pull-up resistor that will make them also read as 3.0v, so you cannot distinguish between pins by their voltage.
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jzef



Joined: 14 Sep 2021
Posts: 20

                    
PostPosted: Fri Oct 01, 2021 12:48 pm    Post subject: Reply with quote

mathdon wrote:
nominal voltage of all output pins is 3.0v

OK, Thx.
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