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HamGadgets Noxas ID-O-Matic II Manual Download Page 13

 

ID-O-Matic II Manual 

02/27/2010 

Page 13 of 14 

Fixing R10: 

The Rev. A printed circuit board has an error in the connection of R10.  If you plan to use R10 to key a 
handheld, you will need to cut a trace and make a connection to the drain of Q4.  The diagram below 
shows the trace to be cut and the connection to be made.  This view shows the circuit board with the 
bottom side facing up.  Before making any changes, make you have your board with the solder side facing 
you (white printing down) and oriented as shown in the diagram below.   
 
Carefully cut the indicated trace with a knife or Dremel tool with a small burr.  Be sure to remove a 
couple millimeters of the copper trace so that you have it completely separated.  The easiest way to make 
the new connection is to scrape off a little of the green solder mask from the remaining copper trace, then 
use a cut-off resistor lead to connect it to the desired pad of Q4.  This is where you will really want to use 
a good quality soldering pencil with a fine pointed tip (and probably a magnifier as well).   
 
 
 

Summary of Contents for Noxas ID-O-Matic II

Page 1: ...econd to over 9 hours may be set All memory and parameter settings retained with power off Auto ID mode with repeater inputs Morse code speed adjustable from 5 to 40 WPM INHIBIT input to delay ID COR input to prevent repeater ID on quiet channel Repeater beacon timer to announce at regular intervals when desired Separate normal and beacon ID messages can be used up to 64 characters each Special ID...

Page 2: ...olytic capacitor 1 220 uF electrolytic capacitor 2 1N4732 4 7V Zener diode 1 100 Ohm resistor brown black brown 1 470 Ohm resistor yellow violet brown 3 1K resistor brown black red 3 2 2K resistor red red red 1 4 7K resistor yellow violet red 1 15K resistor brown green orange 4 100K resistor brown black yellow 2 10K Ohm trimmer potentiometer 6 2N7000 MOSFET 1 78L05 voltage regulator 1 20 MHz cylin...

Page 3: ...agnifying lens to do some of the small soldering required Insert each component from the top side of the board the side with the white silkscreen lettering in the order shown in the instructions below As each component is installed solder the leads and trim off excess leads with a small pair of side cutters 1 Install a 1 uF capacitor marked 104 in the location marked C1 2 Install a 1 uF capacitor ...

Page 4: ... Be sure to get them properly oriented with the 1 3 markings are toward the bottom of the board closer to Q2 27 Install the 78L05 voltage regulator in location U1 Check for proper orientation with outline on board Be sure to check the marking to ensure you have the 78L05 and not one of the 2N7000s 28 Install 2N7000 MOSFET transistors in locations Q1 through Q6 Make sure the transistors are oriente...

Page 5: ... into a rig or a repeater controller don t worry about battery backup all memory and parameter settings are retained in non volatile EEPROM memory and will be automatically recalled when power is applied Check the power supply voltage at pins 5 GROUND and 14 POWER on the 18 pin IC socket at U2 Once you have verified that there is a safe voltage of 5V plus or minus 25V or so remove power Install th...

Page 6: ...LM386 audio amp Level control is provided by the ID_VOL trim pot The other source is the receiver audio input from J1 8 This signal is passed through the IN_VOL level control and the de emphasis circuit R14 C12 then on to the LM386 amplifier The two audio signals are mixed and sent to J1 10 through a DC blocking capacitor COR and INHIBIT Signal Inputs Two control signal inputs COR and INHIBIT are ...

Page 7: ... applied or the ID O Matic II is reset it will send the version number ID Msg Beacon Msg and Alternate Msg if they are set separated by slant bars After initial power up this input can be used to select the Alternate Msg if it is set to be sent in place of the ID Msg This can be used to send an alternate ID message when needed to indicate primary power failure or for whatever other purpose you may...

Page 8: ...r specified ID interval and begins counting down At this time the LED will begin flashing green When the ID timer reaches 60 seconds the LED goes to solid yellow At 30 seconds the LED begins alternating red and yellow until the timer expires At that point the LED goes solid red and the ID message is sent The yellow and blink times are configurable using the setup menu If the interval since the las...

Page 9: ...he Beacon Time setting If this message is not set the regular ID message will be used for the beacon message Alternate ALT Message This message is used in place of the ID message if the ALT TEST input is held low when the timer expires This can be useful to indicate some external condition For example a simple circuit consisting of a series resistor and a 4 7V Zener diode can be used to indicate i...

Page 10: ...want the LED to turn solid yellow Setting this value to zero disables turning the LED yellow Blink time Enter the number of seconds from zero at which you want the LED to begin blinking red yellow Setting this value to zero disables red yellow blinking ID Msg Enter up to 64 characters for your desired Morse code ID Common punctuation and prosigns are supported o Type a dash for BT o Type a semicol...

Page 11: ...er mode This can be set to 3600 to announce the repeater every hour for example if the repeater is idle Enter the number of seconds you wish to have between beacons up to 65535 The beacon message is used if it is set otherwise the ID message will be used Set this to zero to disable beaconing PTT hang time This value is specified in seconds While in repeater mode the PTT output will be active as so...

Page 12: ...when you hit ENTER a number of times Possible serial communication issue see below Q1 bad R8 open or shorted No voltage on J1 3 or J1 4 These are active low open drain outputs See instruction manual Use a pull up resistor if needed Support Should you need support have questions have feature requests or bug problem reports please feel free to contact me via email at n0xas hamgadgets com I will make...

Page 13: ...e your board with the solder side facing you white printing down and oriented as shown in the diagram below Carefully cut the indicated trace with a knife or Dremel tool with a small burr Be sure to remove a couple millimeters of the copper trace so that you have it completely separated The easiest way to make the new connection is to scrape off a little of the green solder mask from the remaining...

Page 14: ...ID O Matic II Manual 02 27 2010 Page 14 of 14 ...

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