diff --git a/app/data/cfg.json b/app/data/cfg.json
index 277ab78..5a92af3 100644
--- a/app/data/cfg.json
+++ b/app/data/cfg.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.8.24",
+  "version": "1.8.25",
   "ext_port": 1111,
   "profiles": {
     "mcopy": {
diff --git a/app/package-lock.json b/app/package-lock.json
index e9c2e48..0fe8532 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "mcopy-app",
-  "version": "1.8.24",
+  "version": "1.8.25",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
diff --git a/app/package.json b/app/package.json
index 99d070b..5716a81 100644
--- a/app/package.json
+++ b/app/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mcopy-app",
-  "version": "1.8.24",
+  "version": "1.8.25",
   "description": "GUI for the mcopy small gauge film optical printer platform",
   "main": "main.js",
   "scripts": {
diff --git a/data/cfg.json b/data/cfg.json
index 277ab78..5a92af3 100644
--- a/data/cfg.json
+++ b/data/cfg.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.8.24",
+  "version": "1.8.25",
   "ext_port": 1111,
   "profiles": {
     "mcopy": {
diff --git a/ino/mcopy_projector_firmware/README.md b/ino/mcopy_projector_firmware/README.md
new file mode 100644
index 0000000..e587772
--- /dev/null
+++ b/ino/mcopy_projector_firmware/README.md
@@ -0,0 +1,13 @@
+# mcopy projector firmware
+
+The goal of this firmware is to drive a JK-compatible gate
+with two (2) NEMA17 stepper motors. Registration will be tracked
+by four (4) IR LED emitters and receivers tracking two (2) 
+double-stage rotary encoders.
+
+
+1. log step index
+2. calculate volate
+3. analogRead() x 3
+4. average readings
+5. populate array with average at index
diff --git a/ino/mcopy_projector_firmware/mcopy_projector_firmware.ino b/ino/mcopy_projector_firmware/mcopy_projector_firmware.ino
index 5530157..a0abb60 100644
--- a/ino/mcopy_projector_firmware/mcopy_projector_firmware.ino
+++ b/ino/mcopy_projector_firmware/mcopy_projector_firmware.ino
@@ -141,3 +141,32 @@ void state () {
   stateString += String(mcopy.STATE);
   mcopy.print(stateString);
 }
+
+long readVcc() {
+  long result;
+  // Read 1.1V reference against AVcc
+  ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
+  delay(2); // Wait for Vref to settle
+  ADCSRA |= _BV(ADSC); // Convert
+  while (bit_is_set(ADCSRA,ADSC));
+  result = ADCL;
+  result |= ADCH<<8;
+  result = 1125300L / result; // Back-calculate AVcc in mV
+  return result;
+}
+
+long analogReadAccurate (int pin) {
+  double Vcc = readVcc() / 1000.0;
+  double ADCValue = analogRead(pin);
+  return (ADCValue / 1024.0) * Vcc;
+}
+
+long analogReadAccurateAverage (int pin) {
+  int count = 3;
+  double sum = 0.0;
+  for (int i = 0; i < count; i++) {
+    sum += analogReadAccurate(pin);
+    delay(1);
+  }
+  return sum / (double) count;
+}
diff --git a/package-lock.json b/package-lock.json
index f4e81b1..5281c9a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mcopy",
-  "version": "1.8.24",
+  "version": "1.8.25",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "mcopy",
-      "version": "1.8.24",
+      "version": "1.8.25",
       "license": "MIT",
       "dependencies": {
         "arduino": "file:app/lib/arduino",
diff --git a/package.json b/package.json
index 34fabfb..024015d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mcopy",
-  "version": "1.8.24",
+  "version": "1.8.25",
   "description": "Small gauge film optical printer platform",
   "main": "build.js",
   "directories": {
diff --git a/processing/mcopy/cfg.json b/processing/mcopy/cfg.json
index 277ab78..5a92af3 100644
--- a/processing/mcopy/cfg.json
+++ b/processing/mcopy/cfg.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.8.24",
+  "version": "1.8.25",
   "ext_port": 1111,
   "profiles": {
     "mcopy": {