diff --git a/lambda-test/lambda-test.c b/lambda-test/lambda-test.c
index 967c15e..410f13f 100644
--- a/lambda-test/lambda-test.c
+++ b/lambda-test/lambda-test.c
@@ -183,7 +183,7 @@
 
 	// enable pull-up resistor so the measured voltage
 	// should be close to AREF
-	PORTC |= ((1 << PC5) | (1 << PC0) | (1 << PC2));
+	PORTC |= ((1 << ADC_TEMPI) | (1 << ADC_TEMPO) | (1 << ADC_LAMBDA));
 
 	_delay_ms(10);
 
diff --git a/lambda/adc.h b/lambda/adc.h
index 041c885..99aa070 100644
--- a/lambda/adc.h
+++ b/lambda/adc.h
@@ -13,10 +13,8 @@
 #define ADC_H_
 
 // TODO put in Makefile
-// #define AREF_MV 4850
 #define AREF_MV 5000
 #define ADC_OFFSET_MV 7
-// #define TEMPO_OP_OFFSET_MV 441
 #define TEMPO_OP_OFFSET_MV 454
 
 #define ADC_TEMPI PC5  // PC5 on diagram
diff --git a/lambda/display.c b/lambda/display.c
index 8237f9b..cec6e23 100644
--- a/lambda/display.c
+++ b/lambda/display.c
@@ -44,16 +44,13 @@
 void cycle(void) {
 	position++;
 	if (position == MENU_MIN_VALUES) {
-		// PORTB |= (1 << PB1);
 		hint = " <";
 		display(measMin);
 	} else if (position == MENU_MAX_VALUES) {
-		// PORTB |= (1 << PB1);
 		hint = " >";
 		display(measMax);
 	} else {
 		position = MENU_OFF;
-		// PORTB &= ~(1 << PB1);
 		hint = "  ";
 		display(measCur);
 	}