version 2.1-2

Author: gavinlyonsrepo

LR_meter/LR_meter.ino

@@ -160,7 +160,7 @@ void scale_one()
   pinMode(Res1M, INPUT);
   digitalWrite(Res2K, LOW);
   float R2 = 0;
-  float R1 = 2.009; // Set this value to the value of the used resistor in K ohms
+  float R1 = 2.005; // Set this value to the value of the used resistor in K ohms
   R2 = calc_Res(R1, 1000);
   if (R2 > (R1 * 1000))
   {
@@ -183,8 +183,8 @@ void scale_two()
   pinMode(Res1M, INPUT);
   digitalWrite(Res20K, LOW);
   float R2 = 0;
-  float R1 = 21.3; // Set this value to the value of the used resistor in K ohms
-  R2 = calc_Res(21.3, 1);
+  float R1 = 18.3; // Set this value to the value of the used resistor in K ohms
+  R2 = calc_Res(20.03, 1);
   if (R2 > R1)
   {
     mode = 8;  //increase scale
@@ -206,7 +206,7 @@ void scale_three()
   pinMode(Res1M, INPUT);
   digitalWrite(Res200K, LOW);
   float R2 = 0;
-  float R1 = 182; // Set this value to the value of the used resistor in K ohms
+  float R1 = 218; // Set this value to the value of the used resistor in K ohms
   R2 = calc_Res(R1, 1);
   if (R2 > R1)
   {
@@ -228,7 +228,7 @@ void scale_four()
   pinMode(Res1M, OUTPUT);
   digitalWrite(Res200K, LOW);
   float R2 = 0;
-  float R1 = 1.006;// Set first value to the value of the used resistor in K ohms
+  float R1 = 1.006;// Set first value to the value of the used resistor in M ohms
   R2 = calc_Res(R1, 1);
   if (R2 > 2)
   {
@@ -396,14 +396,14 @@ void AnalogDisplay()
 //Function L_test: Calculates Inductance
 void L_test()
 {
-  double pulse, frequency, capacitance, inductance;
+  double pulse, frequency, capacitance, inductance = 0;
   digitalWrite(OutLtestPin, HIGH);
   delay(5);//give some time to charge inductor.
   digitalWrite(OutLtestPin, LOW);
   delayMicroseconds(100); //make sure resonation is measured
   pulse = pulseIn(PulseInPin, HIGH, 5000); //returns 0 if timeout
   if (pulse > 0.1) { //pulse returns 0 if no complete pulse was received within the timeout
-
+     
     capacitance = 2.E-6; // - insert Cap value here
 
     frequency = 1.E6 / (2 * pulse);

README.md

@@ -29,7 +29,7 @@ Parts List:
 >
 > Arduino NANO or UNO
 >
-> Resistors: 2kohms, 20kohms, 200kohms, 1Mohms, 150ohm, 330ohm.
+> Resistors: 2kohms, 20kohms, 200kohms, 1Mohms, 150ohm, 330ohm, 4.7Kohms X 2 .
 >
 > Capacitors: 2 uF non-polarized  
 >
@@ -39,7 +39,7 @@ Parts List:
 >
 > LM393 comparator IC [datasheet](https://www.onsemi.com/pub/Collateral/LM393-D.PDF) or LM339
 >
-> Output terminal or socket connections
+> ZIF test socket , Output terminal or socket connections
 >
 
 
@@ -110,7 +110,7 @@ We can now solve the equation for inductance.
 
 **Display ADC in digital value and Voltage.**
 
-This displays the voltage and ADC digital value measured on AO, This can be sued for testing potentiometers,
+This displays the voltage and ADC digital value measured on A0, This can be used for testing potentiometers,
 sensors or measuring voltage levels.
 
 Copyright

documentation/CHANGELOG.md

@@ -8,4 +8,11 @@
 	replaced joysticks control with pushbuttons.
 	Analog input display added.
 	Status LED added.
+
+* Version 2.1-2 April 2009
+	Added pull up resistors for OLED I2C.
+	Added initialize value of zero to variables in Inductance function,
+	in order to prevent random values being reported in event of zero pulse.
+	Finalized resistor values for finished produced prototype PCB.
+
 

documentation/Notes.txt

@@ -0,0 +1,19 @@
+ZIF TEST socket pin layout
+----------------------------------
+
+1. A2 n/c n/c n/c R    R  R R 
+
+2. A0 n/c GND n/c VCC n/c L L 
+
+
+
+Resistors values used in code:
+
+1. 2.005 Kohms
+2. 20.03 Kohms
+3. 218   Kohms
+4. 1.006 Mohms 
+
+Capacitor value
+
+1. 2uF

documentation/eagle/LR_meter.sch

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE eagle SYSTEM "eagle.dtd">
-<eagle version="9.3.0">
+<eagle version="9.3.1">
 <drawing>
 <settings>
 <setting alwaysvectorfont="no"/>
@@ -10658,7 +10658,7 @@ SparkFun BigTime Watch Kit&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;
 <part name="D1" library="diode" library_urn="urn:adsk.eagle:library:210" deviceset="1N4148" device="DO35-10" package3d_urn="urn:adsk.eagle:package:43344/2" value="1N4148"/>
 <part name="C2" library="capacitor-wima" library_urn="urn:adsk.eagle:library:116" deviceset="C" device="5/2.5" package3d_urn="urn:adsk.eagle:package:5426/1" value="2uF"/>
 <part name="R7" library="resistor" library_urn="urn:adsk.eagle:library:348" deviceset="R-EU_" device="0207/15" package3d_urn="urn:adsk.eagle:package:25947/1" value="330"/>
-<part name="IC1" library="linear" library_urn="urn:adsk.eagle:library:262" deviceset="LM393" device="N" package3d_urn="urn:adsk.eagle:package:16409/2" value="LM339"/>
+<part name="IC1" library="linear" library_urn="urn:adsk.eagle:library:262" deviceset="LM393" device="N" package3d_urn="urn:adsk.eagle:package:16409/2" value="LM393"/>
 <part name="SUPPLY1" library="supply2" library_urn="urn:adsk.eagle:library:372" deviceset="GND" device=""/>
 <part name="SUPPLY2" library="supply2" library_urn="urn:adsk.eagle:library:372" deviceset="GND" device=""/>
 <part name="SUPPLY4" library="supply2" library_urn="urn:adsk.eagle:library:372" deviceset="VCC" device=""/>
@@ -10673,6 +10673,9 @@ SparkFun BigTime Watch Kit&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;
 <part name="S1" library="SparkFun-Switches" library_urn="urn:adsk.eagle:library:535" deviceset="MOMENTARY-SWITCH-SPST" device="-PTH-6.0MM-KIT" package3d_urn="urn:adsk.eagle:package:40170/1" value="SPST Mode button"/>
 <part name="S2" library="SparkFun-Switches" library_urn="urn:adsk.eagle:library:535" deviceset="MOMENTARY-SWITCH-SPST" device="-PTH-6.0MM-KIT" package3d_urn="urn:adsk.eagle:package:40170/1" value="SPST Test Button"/>
 <part name="SUPPLY6" library="supply2" library_urn="urn:adsk.eagle:library:372" deviceset="GND" device=""/>
+<part name="R1" library="eagle-ltspice" library_urn="urn:adsk.eagle:library:217" deviceset="R" device="0207/10" package3d_urn="urn:adsk.eagle:package:13275/1" value="4.7k"/>
+<part name="R8" library="eagle-ltspice" library_urn="urn:adsk.eagle:library:217" deviceset="R" device="0207/10" package3d_urn="urn:adsk.eagle:package:13275/1" value="4.7K"/>
+<part name="SUPPLY8" library="supply2" library_urn="urn:adsk.eagle:library:372" deviceset="VCC" device=""/>
 </parts>
 <sheets>
 <sheet>
@@ -10742,7 +10745,7 @@ SparkFun BigTime Watch Kit&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;
 <attribute name="VALUE" x="-23.495" y="40.005" size="1.778" layer="96" rot="R180"/>
 </instance>
 <instance part="J4" gate="G$1" x="-45.72" y="48.26" smashed="yes">
-<attribute name="VALUE" x="-55.88" y="60.706" size="1.778" layer="96" font="vector" align="top-left"/>
+<attribute name="VALUE" x="-55.88" y="37.846" size="1.778" layer="96" font="vector" rot="R90" align="top-left"/>
 <attribute name="NAME" x="-50.8" y="56.134" size="1.778" layer="95" font="vector"/>
 </instance>
 <instance part="J3" gate="J$1" x="-20.32" y="96.52" smashed="yes" rot="R270">
@@ -10770,6 +10773,17 @@ SparkFun BigTime Watch Kit&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;
 <instance part="SUPPLY6" gate="GND" x="27.94" y="109.22" smashed="yes" rot="R180">
 <attribute name="VALUE" x="29.845" y="112.395" size="1.778" layer="96" rot="R180"/>
 </instance>
+<instance part="R1" gate="G$1" x="-38.1" y="88.9" smashed="yes" rot="R90">
+<attribute name="NAME" x="-39.5986" y="85.09" size="1.778" layer="95" rot="R90"/>
+<attribute name="VALUE" x="-39.878" y="92.71" size="1.778" layer="96" rot="R90"/>
+</instance>
+<instance part="R8" gate="G$1" x="-35.56" y="88.9" smashed="yes" rot="R90">
+<attribute name="NAME" x="-31.9786" y="92.71" size="1.778" layer="95" rot="R90"/>
+<attribute name="VALUE" x="-32.258" y="85.09" size="1.778" layer="96" rot="R90"/>
+</instance>
+<instance part="SUPPLY8" gate="G$1" x="-38.1" y="104.14" smashed="yes">
+<attribute name="VALUE" x="-40.005" y="107.315" size="1.778" layer="96"/>
+</instance>
 </instances>
 <busses>
 </busses>
@@ -10963,6 +10977,15 @@ SparkFun BigTime Watch Kit&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;
 <junction x="-22.86" y="88.9"/>
 <pinref part="SUPPLY3" gate="G$1" pin="VCC"/>
 </segment>
+<segment>
+<pinref part="R8" gate="G$1" pin="2"/>
+<wire x1="-35.56" y1="93.98" x2="-35.56" y2="101.6" width="0.1524" layer="91"/>
+<wire x1="-35.56" y1="101.6" x2="-38.1" y2="101.6" width="0.1524" layer="91"/>
+<wire x1="-38.1" y1="101.6" x2="-38.1" y2="93.98" width="0.1524" layer="91"/>
+<pinref part="R1" gate="G$1" pin="2"/>
+<pinref part="SUPPLY8" gate="G$1" pin="VCC"/>
+<junction x="-38.1" y="101.6"/>
+</segment>
 </net>
 <net name="VRX" class="0">
 <segment>
@@ -10979,6 +11002,9 @@ SparkFun BigTime Watch Kit&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;
 <pinref part="J4" gate="G$1" pin="4"/>
 <pinref part="U$1" gate="G$1" pin="A5"/>
 <wire x1="-38.1" y1="53.34" x2="-12.7" y2="53.34" width="0.1524" layer="91"/>
+<wire x1="-38.1" y1="53.34" x2="-38.1" y2="83.82" width="0.1524" layer="91"/>
+<junction x="-38.1" y="53.34"/>
+<pinref part="R1" gate="G$1" pin="1"/>
 </segment>
 </net>
 <net name="N$2" class="0">
@@ -10988,7 +11014,11 @@ SparkFun BigTime Watch Kit&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;
 <wire x1="-12.7" y1="55.88" x2="-33.02" y2="55.88" width="0.1524" layer="91"/>
 <wire x1="-33.02" y1="55.88" x2="-33.02" y2="50.8" width="0.1524" layer="91"/>
 <pinref part="J4" gate="G$1" pin="3"/>
-<wire x1="-33.02" y1="50.8" x2="-38.1" y2="50.8" width="0.1524" layer="91"/>
+<wire x1="-33.02" y1="50.8" x2="-35.56" y2="50.8" width="0.1524" layer="91"/>
+<wire x1="-35.56" y1="50.8" x2="-38.1" y2="50.8" width="0.1524" layer="91"/>
+<wire x1="-35.56" y1="50.8" x2="-35.56" y2="83.82" width="0.1524" layer="91"/>
+<junction x="-35.56" y="50.8"/>
+<pinref part="R8" gate="G$1" pin="1"/>
 </segment>
 </net>
 <net name="N$5" class="0">