Announcement

Collapse
No announcement yet.

Receiver Voltage Requirements

Collapse
This topic is closed.
X
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Receiver Voltage Requirements

    OK guys...I have done some checking on reciever voltage requirements and here is what I have found.

    First of all, you can measure the voltage being supplied by your serial port by measuring the voltage across pin 4 and 7. If you are looking straight at the end of your serial DB9 Plug, Pin 4 is the pin on the bottom row far left and Pin 7 is the top row, middle pin.

    The receiver circuit has a transistor for reverse voltage protection and also a voltage regulator to drop voltage input down to 5V. If the voltage being supplied by your serial port is Less Than about 7.5V then you are not getting enough power to your receiver.

    I am working on a workaround to bypass the voltage regulator, I have it working here and it enables my KeySpan USB-Serial adapter to power the device. My KeySpan USB-Serial only provides 5.79V across pins 4 & 7 and when I put the workaround in place, it drops to 4.3 supplied to the receiver. I am waiting on word back from the supplier to see if 4.3V is enough as the specs say it needs 4.5V.

    If you are having droppouts and want to check the voltage that your PIC and receiver are getting, you can check the voltage across Pin 1 & 8 on the PIC chip which are the two pins at the top by the notch.

    Stay tuned for more as I figure it out.

    PiperPilot

    #2
    If we provide a 9V external power supply, I'm assuming this would eliminate the need for serial port power?
    HS4Pro on a Raspberry Pi4
    54 Z-Wave Nodes / 21 Zigbee Devices / 108 Events / 767 Devices
    Plugins: Z-Wave / Zigbee Plus / EasyTrigger / AK Weather / OMNI

    HSTouch Clients: 1 Android

    Comment


      #3
      Yes, that is correct. If you supply the 9V adapter to the receiver you don't need to worry about this at all.

      Comment


        #4
        Can those of you guys using external power share with us if you are still getting drops even after applying external power ???
        Thanks
        Dani

        Comment


          #5
          I'm using a wall wart and am getting no drops, with Tag Off Timeout set to 60. I may well be able to get by with it set to 30, but this works, and meets my needs.

          Comment


            #6
            Jim,

            Antenna type?

            --Dan
            Tasker, to a person who does Homeautomation...is like walking up to a Crack Treatment facility with a truck full of 3lb bags of crack. Then for each person that walks in and out smack them in the face with an open bag.

            Comment


              #7
              External power

              I have plugged in a 7.5VDC wall wart to mine. I have 9VDC wall warts around but have to look.

              logs show:

              <TABLE id=GridView1 style="BORDER-COLLAPSE: collapse" cellSpacing=0 rules=all border=1><TBODY><TR style="BACKGROUND-COLOR: palevioletred"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:10:04 AM</TD><TD>Away </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: lightgreen"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:09:04 AM</TD><TD>In Range </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: palevioletred"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:07:56 AM</TD><TD>Away </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: lightgreen"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:06:15 AM</TD><TD>In Range </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: palevioletred"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:04:17 AM</TD><TD>Away </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: lightgreen"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:03:17 AM</TD><TD>In Range </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: palevioletred"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:01:00 AM</TD><TD>Away </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: lightgreen"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/21/2007 12:00:00 AM</TD><TD>In Range </TD><TD>COM15</TD></TR><TR style="BACKGROUND-COLOR: palevioletred"><TD>1mqY</TD><TD>BMW - 1mqY</TD><TD>CheaperRFID Plugin</TD><TD>3/20/2007 11:58:53 PM</TD><TD>Away </TD><TD>COM15</TD></TR></TBODY></TABLE>

              I am using a w800 style antenna and BMW is approximately 25 feet from reciever. Don't know if a 9VDC transformer will change this. What is a bit odd is that my first testing was with the 40M TX in trunk of BMW (in garage) connected to 12V tank battery and 40M TX in headliner of Mazda (in driveway). My setup was like this for a week with no issues with small telecopic antenna on RFID RX. When I added the Honda tag (in the headliner and about 10 feet from RFID RX) and the W800 style antenna is when I started to see the dropping. Will move the BMW tag to one side of the trunk and see what happens. No changes to the dropping when moving the tag. Tomorrow will move RFID RX to the basement with W800 antenna to see what happens. Added the test tag (just one more test before going to sleep) and it came up right away from my office (on the other side of the house).

              Checking this morning (6 hours running with external power) all four tags have dropped all night. (all randomly)

              Moved the 8m test tag over near the BMW. Took the 40m tag to the outside of the BMW. Disconnected the external power supply. Did all of this last night. Current results show:

              Serial Interface 1: Connected on COM15
              Serial Interface 2: CheaperRFID Tag Status
              TagID Name Device Code Last Update Last Change Status Received From
              2fNy Test - 2fNy ,4 3/22/2007 4:32:30 AM 3/21/2007 6:39:26 PM On COM15
              1mqY BMW - 1mqY ,2 3/22/2007 4:24:48 AM 3/22/2007 4:29:13 AM Off COM15
              2IWO Mazda - 2IWO ,3 3/22/2007 4:32:30 AM 3/21/2007 6:39:22 PM On COM15
              1n6e Honda - 1n6e ,5 3/22/2007 4:32:30 AM 3/21/2007 8:27:01 PM On COM15

              This showing that only the BMW tag is dropping and the rest have stayed on all night.

              TagID Name Location ChangeTime Status Interface
              1n6e Honda - 1n6e CheaperRFID Plugin 3/21/2007 8:27:01 PM In Range COM15
              1n6e Honda - 1n6e CheaperRFID Plugin 3/21/2007 7:21:03 AM Away COM15

              2IWO Mazda - 2IWO CheaperRFID Plugin 3/21/2007 6:39:22 PM In Range COM15
              2IWO Mazda - 2IWO CheaperRFID Plugin 3/21/2007 6:19:48 PM Away COM15
              2IWO Mazda - 2IWO CheaperRFID Plugin 3/21/2007 5:40:21 PM In Range COM15
              2IWO Mazda - 2IWO CheaperRFID Plugin 3/21/2007 7:21:36 AM Away COM15

              2fNy Test - 2fNy CheaperRFID Plugin 3/21/2007 6:39:26 PM In Range COM15
              2fNy Test - 2fNy CheaperRFID Plugin 3/21/2007 6:19:49 PM Away COM15

              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:38:23 AM Away COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:35:20 AM In Range COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:34:21 AM Away COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:33:21 AM In Range COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:29:13 AM Away COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:28:13 AM In Range COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:25:48 AM Away COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:23:37 AM In Range COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:18:48 AM Away COM15
              1mqY BMW - 1mqY CheaperRFID Plugin 3/22/2007 4:17:48 AM In Range COM15

              Next test will move the BMW tag to another location in the house.

              BTW disconnected external power and went back to using RS-232 power - maybe its the 40M RFID Tag or the trunk....

              Moved it out of the trunk. Its now sitting on a shelf in the garage plugged into same tank battery about 30 feet from the RFID RX. Its still dropping in/out.

              Moved tank battery with RFID 40 TX around the house. Same results of it dropping in and out.

              Measured voltage on tank battery. It is at 13VDC.

              Found a 12VDC 200 Mw transformer. Measured voltage on it and it measures 14VDC.

              Plugged it into the RFID TX. It appears to be working fine now with no drop outs.

              Will move it around the house and see if it continues to work.

              So it might be a voltage thing and and RFID TX thing.

              Still working with no drop outs after about an hour.

              Will test in the trunk of the bimmer with the transformer connected and see what happens.
              Last edited by Pete; March 22, 2007, 09:00 PM.
              - Pete

              Auto mator
              Homeseer 3 Pro - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e 64 bit Intel Haswell CPU 16Gb
              Homeseer Zee2 (Lite) - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e - CherryTrail x5-Z8350 BeeLink 4Gb BT3 Pro
              HS4 Lite - Ubuntu 22.04 / Lenovo Tiny M900 / 32Gb Ram

              HS4 Pro - V4.1.18.1 - Ubuntu 22.04 / Lenova Tiny M900 / 32Gb Ram
              HSTouch on Intel tabletop tablets (Jogglers) - Asus AIO - Windows 11

              X10, UPB, Zigbee, ZWave and Wifi MQTT automation-Tasmota-Espurna. OmniPro 2, Russound zoned audio, Alexa, Cheaper RFID, W800 and Home Assistant

              Comment


                #8
                Worked all night. So the issue may have been related to the voltage of the 40M RFID RX.
                - Pete

                Auto mator
                Homeseer 3 Pro - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e 64 bit Intel Haswell CPU 16Gb
                Homeseer Zee2 (Lite) - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e - CherryTrail x5-Z8350 BeeLink 4Gb BT3 Pro
                HS4 Lite - Ubuntu 22.04 / Lenovo Tiny M900 / 32Gb Ram

                HS4 Pro - V4.1.18.1 - Ubuntu 22.04 / Lenova Tiny M900 / 32Gb Ram
                HSTouch on Intel tabletop tablets (Jogglers) - Asus AIO - Windows 11

                X10, UPB, Zigbee, ZWave and Wifi MQTT automation-Tasmota-Espurna. OmniPro 2, Russound zoned audio, Alexa, Cheaper RFID, W800 and Home Assistant

                Comment


                  #9
                  Receiver Power Req.

                  If I understand. You have moved your receiver power supply from 9 to 12
                  and that helped the dropout problem ??
                  Ubuntu on the Intel NUC ( 8i5BEK ), 32 G, 250G SSD, V4 Pro 😎

                  Comment


                    #10
                    gearyt,

                    No, I tested the RFID reciever with the external power supply (at 7.5 VDC). I never tested the RFID reciever at 9.0VDC. I still saw the same issues of the bimmer tag (and the others occasionally) dropping out with external power to reciever. It seems that the issue was with the 40M RFID Tag. The tank battery I was using to power the TX tag was about 13VDC. I also tested the tag next to the map light of the bimmer and it keep dropping in/out. When I powered the tag with 200Ma 12VDC transformer (measured it to be 14VDC) the tag dropping in/out issue went away. I moved it all over the house and it worked fine. I sent the tag back today to PiperPilot for a replacement. BTW went back to using the RS-232 power instead of the external power supply (working fine with 2 40M and 1 8M tag).
                    Last edited by Pete; March 24, 2007, 10:03 PM.
                    - Pete

                    Auto mator
                    Homeseer 3 Pro - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e 64 bit Intel Haswell CPU 16Gb
                    Homeseer Zee2 (Lite) - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e - CherryTrail x5-Z8350 BeeLink 4Gb BT3 Pro
                    HS4 Lite - Ubuntu 22.04 / Lenovo Tiny M900 / 32Gb Ram

                    HS4 Pro - V4.1.18.1 - Ubuntu 22.04 / Lenova Tiny M900 / 32Gb Ram
                    HSTouch on Intel tabletop tablets (Jogglers) - Asus AIO - Windows 11

                    X10, UPB, Zigbee, ZWave and Wifi MQTT automation-Tasmota-Espurna. OmniPro 2, Russound zoned audio, Alexa, Cheaper RFID, W800 and Home Assistant

                    Comment


                      #11
                      ahhhhhhhh.... got the sucker !!

                      I did it all, new rs antenna, up in attic
                      new batteries
                      install 12vdc units in cars
                      latest software
                      etc, etc...

                      BUT...

                      what it was, and no-one caught it ( see picture in prevoius threads )
                      one of my antennas was pointed at the battery
                      driving the system crazy. everything was going backwards,
                      moved the little rubber duckie and wha la !! we be up !!
                      It is somewhere in the early threads, to watch out for this

                      Hope this helps someone else

                      geary
                      Ubuntu on the Intel NUC ( 8i5BEK ), 32 G, 250G SSD, V4 Pro 😎

                      Comment


                        #12
                        gearyt, so it was the little nubby antenna being perpendicular to the battery in the 8M RFID TX was the cause of your problems?

                        Yes, a couple of days now and no drop outs with 2 40M tags in the cars in the headliners adjacent to dome lights. One car is in the garage and one is outside. The 8M tag works throughout the house. The W800 antenna is mounted next to the garage Rainbird Box (now Rain8Net) and power is via the RS-232. Its not really a big deal whether I use the external power or not. Its just a bit more esthetically pleasing without it. I didn't really see any differences between the external power / RS-232 power. Having the ability of using the RS-232 to power the RFID RX lets me place it anywhere. (IE attic,garage, etc).
                        - Pete

                        Auto mator
                        Homeseer 3 Pro - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e 64 bit Intel Haswell CPU 16Gb
                        Homeseer Zee2 (Lite) - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e - CherryTrail x5-Z8350 BeeLink 4Gb BT3 Pro
                        HS4 Lite - Ubuntu 22.04 / Lenovo Tiny M900 / 32Gb Ram

                        HS4 Pro - V4.1.18.1 - Ubuntu 22.04 / Lenova Tiny M900 / 32Gb Ram
                        HSTouch on Intel tabletop tablets (Jogglers) - Asus AIO - Windows 11

                        X10, UPB, Zigbee, ZWave and Wifi MQTT automation-Tasmota-Espurna. OmniPro 2, Russound zoned audio, Alexa, Cheaper RFID, W800 and Home Assistant

                        Comment


                          #13
                          so it seems.. but now the wife is upset that her
                          keyless entry no longer works in her car ( Ford Explorer )
                          althought mine work in my Lincoln...

                          Things are going in the right direction
                          Ubuntu on the Intel NUC ( 8i5BEK ), 32 G, 250G SSD, V4 Pro 😎

                          Comment


                            #14
                            gearyt,

                            Check doc - Ford - TSB 03-18-1 - document relating to 315Mhz Ford Keyless entry.

                            http://www.ford-trucks.com/tsb/fullt...hp?tsb=03-18-1
                            - Pete

                            Auto mator
                            Homeseer 3 Pro - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e 64 bit Intel Haswell CPU 16Gb
                            Homeseer Zee2 (Lite) - 3.0.0.548 (Linux) - Ubuntu 18.04/W7e - CherryTrail x5-Z8350 BeeLink 4Gb BT3 Pro
                            HS4 Lite - Ubuntu 22.04 / Lenovo Tiny M900 / 32Gb Ram

                            HS4 Pro - V4.1.18.1 - Ubuntu 22.04 / Lenova Tiny M900 / 32Gb Ram
                            HSTouch on Intel tabletop tablets (Jogglers) - Asus AIO - Windows 11

                            X10, UPB, Zigbee, ZWave and Wifi MQTT automation-Tasmota-Espurna. OmniPro 2, Russound zoned audio, Alexa, Cheaper RFID, W800 and Home Assistant

                            Comment


                              #15
                              Power supply for receiver

                              Can you use a 12vdc power supply on the receiver without problems?

                              Comment

                              Working...
                              X