diff --git a/src/state.c b/src/state.c
index 5c7a3bb..273709b 100644
--- a/src/state.c
+++ b/src/state.c
@@ -8,11 +8,12 @@
 
 static int pwm_slice = 0;
 
-uint8_t current_power = 0;
-uint8_t target_power = 0;
+// Note: These are all in % of a %, eg. 100% = 10000.
+uint16_t current_power = 0;
+uint16_t target_power = 0;
 
 #define RAMP_PERIOD_MS 1
-#define RAMP_STEP 2
+#define RAMP_STEP 200
 
 // Timer and callback for ramping power. Jumping ~50% power or more in one go kills the
 // chip with electrical ripples, so be a bit gentle about it.
@@ -26,8 +27,8 @@ static void ramp_timer_callback(struct btstack_timer_source* ts) {
 		} else {
 			current_power = target_power;
 		}
-		pwm_set_chan_level(pwm_slice, PWM_CHAN_A, current_power);
-		pwm_set_chan_level(pwm_slice, PWM_CHAN_B, current_power);
+		pwm_set_chan_level(pwm_slice, PWM_CHAN_A, current_power / 100);
+		pwm_set_chan_level(pwm_slice, PWM_CHAN_B, current_power / 100);
 	}
 
 	btstack_run_loop_set_timer(ts, RAMP_PERIOD_MS);
@@ -52,5 +53,5 @@ void state_set_power(uint8_t power) {
 	if (power > 100) {
 		power = 100;
 	}
-	target_power = power;
+	target_power = power * 100;
 }
diff --git a/src/state.h b/src/state.h
index d34ae92..9f854bf 100644
--- a/src/state.h
+++ b/src/state.h
@@ -3,11 +3,6 @@
 
 #include <stdint.h>
 
-// Current power level, 0-100.
-extern uint8_t current_power;
-// Target power level (that we're ramping to), 0-100.
-extern uint8_t target_power;
-
 // Initialize wand state.
 void state_init();