diff --git a/sim/components/brightness/BrightnessController.cpp b/sim/components/brightness/BrightnessController.cpp
index 5935b8c..3e9a985 100644
--- a/sim/components/brightness/BrightnessController.cpp
+++ b/sim/components/brightness/BrightnessController.cpp
@@ -2,40 +2,39 @@
 // #include <hal/nrf_gpio.h>
 #include "displayapp/screens/Symbols.h"
 #include "drivers/PinMap.h"
+
+#include <tuple> // std::ignore
+
 using namespace Pinetime::Controllers;
 
 void BrightnessController::Init() {
-  // nrf_gpio_cfg_output(PinMap::LcdBacklightLow);
-  // nrf_gpio_cfg_output(PinMap::LcdBacklightMedium);
-  // nrf_gpio_cfg_output(PinMap::LcdBacklightHigh);
   Set(level);
 }
 
+void BrightnessController::ApplyBrightness(uint16_t rawBrightness) {
+  std::ignore = rawBrightness;
+}
+
 void BrightnessController::Set(BrightnessController::Levels level) {
   this->level = level;
-  // switch (level) {
-  //   default:
-  //   case Levels::High:
-  //     nrf_gpio_pin_clear(PinMap::LcdBacklightLow);
-  //     nrf_gpio_pin_clear(PinMap::LcdBacklightMedium);
-  //     nrf_gpio_pin_clear(PinMap::LcdBacklightHigh);
-  //     break;
-  //   case Levels::Medium:
-  //     nrf_gpio_pin_clear(PinMap::LcdBacklightLow);
-  //     nrf_gpio_pin_clear(PinMap::LcdBacklightMedium);
-  //     nrf_gpio_pin_set(PinMap::LcdBacklightHigh);
-  //     break;
-  //   case Levels::Low:
-  //     nrf_gpio_pin_clear(PinMap::LcdBacklightLow);
-  //     nrf_gpio_pin_set(PinMap::LcdBacklightMedium);
-  //     nrf_gpio_pin_set(PinMap::LcdBacklightHigh);
-  //     break;
-  //   case Levels::Off:
-  //     nrf_gpio_pin_set(PinMap::LcdBacklightLow);
-  //     nrf_gpio_pin_set(PinMap::LcdBacklightMedium);
-  //     nrf_gpio_pin_set(PinMap::LcdBacklightHigh);
-  //     break;
-  // }
+  switch (level) {
+    default:
+    case Levels::High:
+      ApplyBrightness(3 * timerPeriod);
+      break;
+    case Levels::Medium:
+      ApplyBrightness(2 * timerPeriod);
+      break;
+    case Levels::Low:
+      ApplyBrightness(timerPeriod);
+      break;
+    case Levels::AlwaysOn:
+      ApplyBrightness(timerPeriod / 10);
+      break;
+    case Levels::Off:
+      ApplyBrightness(0);
+      break;
+  }
 }
 
 void BrightnessController::Lower() {
@@ -74,14 +73,6 @@ BrightnessController::Levels BrightnessController::Level() const {
   return level;
 }
 
-void BrightnessController::Backup() {
-  backupLevel = level;
-}
-
-void BrightnessController::Restore() {
-  Set(backupLevel);
-}
-
 void BrightnessController::Step() {
   switch (level) {
     case Levels::Low:
@@ -97,7 +88,6 @@ void BrightnessController::Step() {
       break;
   }
 }
-
 const char* BrightnessController::GetIcon() {
   switch (level) {
     case Levels::Medium:
@@ -123,4 +113,4 @@ const char* BrightnessController::ToString() {
     default:
       return "???";
   }
-}
\ No newline at end of file
+}
diff --git a/sim/components/brightness/BrightnessController.h b/sim/components/brightness/BrightnessController.h
index 4ee4921..0bd7028 100644
--- a/sim/components/brightness/BrightnessController.h
+++ b/sim/components/brightness/BrightnessController.h
@@ -2,6 +2,9 @@
 
 #include <cstdint>
 
+//#include "nrf_ppi.h"
+//#include "nrfx_gpiote.h"
+
 namespace Pinetime {
   namespace Controllers {
     class BrightnessController {
@@ -15,15 +18,30 @@ namespace Pinetime {
       void Higher();
       void Step();
 
-      void Backup();
-      void Restore();
-
       const char* GetIcon();
       const char* ToString();
 
     private:
       Levels level = Levels::High;
-      Levels backupLevel = Levels::High;
+      static constexpr uint8_t UNSET = UINT8_MAX;
+      uint8_t lastPin = UNSET;
+      // Maximum time (μs) it takes for the RTC to fully stop
+      static constexpr uint8_t rtcStopTime = 46;
+      // Frequency of timer used for PWM (Hz)
+      static constexpr uint16_t timerFrequency = 32768;
+      // Backlight PWM frequency (Hz)
+      static constexpr uint16_t pwmFreq = 1000;
+      // Wraparound point in timer ticks
+      // Defines the number of brightness levels between each pin
+      static constexpr uint16_t timerPeriod = timerFrequency / pwmFreq;
+      // Warning: nimble reserves some PPIs
+      // https://github.com/InfiniTimeOrg/InfiniTime/blob/034d83fe6baf1ab3875a34f8cee387e24410a824/src/libs/mynewt-nimble/nimble/drivers/nrf52/src/ble_phy.c#L53
+      // SpiMaster uses PPI 0 for an erratum workaround
+      // Channel 1, 2 should be free to use
+      //static constexpr nrf_ppi_channel_t ppiBacklightOn = NRF_PPI_CHANNEL1;
+      //static constexpr nrf_ppi_channel_t ppiBacklightOff = NRF_PPI_CHANNEL2;
+
+      void ApplyBrightness(uint16_t val);
     };
   }
 }