diff --git a/bootloader.c b/bootloader.c
index d4cfe32..dd52642 100644
--- a/bootloader.c
+++ b/bootloader.c
@@ -86,10 +86,9 @@ void main(void)
 
 	rcc_clock_setup_in_hse_8mhz_out_72mhz(); // start main clock
 	board_setup(); // setup board to control LED
-#if defined(BUSVOODOO)
-	led_red(); // switch red LED to indicate bootloader started
-#else
 	led_on(); // indicate bootloader started
+#if defined(BUSVOODOO)
+	led_toggle(); // switch from blue to red LED
 #endif
 	usb_dfu_setup(); // setup USB DFU for firmware upload
 	usb_dfu_start(); // run DFU mode
diff --git a/global.c b/global.c
index 7f0311e..553e7c9 100644
--- a/global.c
+++ b/global.c
@@ -28,7 +28,6 @@
 #include <libopencm3/cm3/systick.h> // SysTick library
 #include <libopencm3/stm32/rcc.h> // real-time control clock library
 #include <libopencm3/stm32/gpio.h> // general purpose input output library
-#include <libopencm3/stm32/timer.h> // timer library
 #include <libopencm3/stm32/exti.h> // external interrupt defines
 
 #include "global.h" // common methods
@@ -68,8 +67,7 @@ char* b2s(uint64_t binary, uint8_t rjust)
 void led_on(void)
 {
 #if defined(BUSVOODOO)
-	timer_disable_counter(TIM1); // disable timer for PWM
-	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin to 'output push-pull'
+	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin push-pull
 #endif
 #if defined(LED_ON) && LED_ON
 	gpio_set(GPIO(LED_PORT), GPIO(LED_PIN));
@@ -82,8 +80,7 @@ void led_on(void)
 void led_off(void)
 {
 #if defined(BUSVOODOO)
-	timer_disable_counter(TIM1); // disable timer for PWM
-	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, GPIO(LED_PIN)); // set LED pin to 'output push-pull'
+	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, GPIO(LED_PIN)); // set LED pin to floating to disable LEDs
 #else
 #if defined(LED_ON) && LED_ON
 	gpio_clear(GPIO(LED_PORT), GPIO(LED_PIN));
@@ -97,50 +94,11 @@ void led_off(void)
 void led_toggle(void)
 {
 #if defined(BUSVOODOO)
-	timer_disable_counter(TIM1); // disable timer for PWM
-	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin to 'output push-pull'
+	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin to push-pull
 #endif
 	gpio_toggle(GPIO(LED_PORT), GPIO(LED_PIN));
 }
 
-#if defined(BUSVOODOO)
-void led_blink(double period, double duty)
-{
-	if (period<0.0 || period>6.0 || duty<0.0 || duty>1.0) { // input argument out of bounds
-		return; // do nothing
-	}
-	timer_disable_counter(TIM1); // disable timer for PWM before resetting it
-	if (0.0==period) { // no blinking
-		 gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin as normal output
-		if (duty>0.5) { // LED should be on
-			gpio_set(GPIO(LED_PORT), GPIO(LED_PIN)); // switch LED on
-		} else { // LED should be off
-			gpio_clear(GPIO(LED_PORT), GPIO(LED_PIN)); // switch LED off
-		}
-	} else {
-		gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO(LED_PIN)); // set LED pin to alternate function for PWM
-		timer_set_counter(TIM1, 0); // reset counter
-		timer_set_period(TIM1, 0xffff*(period/6.0)); // set period
-		timer_set_oc_value(TIM1, TIM_OC1, 0xffff*(period/6.0)*duty); // PWM duty cycle
-		timer_enable_counter(TIM1); // enable timer to start blinking
-	}
-}
-
-void led_blue(void)
-{
-	timer_disable_counter(TIM1); // disable timer for PWM
-	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin to 'output push-pull'
-	gpio_set(GPIO(LED_PORT), GPIO(LED_PIN));
-}
-
-void led_red(void)
-{
-	timer_disable_counter(TIM1); // disable timer for PWM
-	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin to 'output push-pull'
-	gpio_clear(GPIO(LED_PORT), GPIO(LED_PIN));
-}
-#endif
-
 void sleep_us(uint32_t duration)
 {
 	systick_counter_disable(); // disable SysTick to reconfigure it
@@ -213,16 +171,9 @@ void board_setup(void)
 	// setup LED
 	rcc_periph_clock_enable(RCC_GPIO(LED_PORT)); // enable clock for LED
 #if defined(BUSVOODOO)
-	// LED is connected to TIM1_CH1, allowing to used the PWM output so to display patterns
-	rcc_periph_clock_enable(RCC_TIM1); // enable clock for timer domain
-	timer_reset(TIM1); //  reset timer configuration
-	timer_set_mode(TIM1, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_CENTER_1, TIM_CR1_DIR_UP); // configure timer to up counting mode (center aligned for more precise duty cycle control)
-	timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_PWM1); // use PWM output compare mode
-	timer_enable_oc_output(TIM1, TIM_OC1); // enable output compare output
-	timer_enable_break_main_output(TIM1); // required to enable timer, even when no dead time is used
-	timer_set_prescaler(TIM1, 3296-1); // set prescaler to allow 3/3 seconds PWM output (72MHz/2^16/3296=0.33Hz)
+	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, GPIO(LED_PIN)); // set LED pin to floating to disable LEDs
 #else
-	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin to 'output push-pull'
+	gpio_set_mode(GPIO(LED_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(LED_PIN)); // set LED pin to output push-pull do drive LED
 #endif
 	led_off(); // switch off LED per default
 
diff --git a/global.h b/global.h
index e3e2817..a2361bd 100644
--- a/global.h
+++ b/global.h
@@ -357,7 +357,7 @@
 #if defined(SYSTEM_BOARD) || defined(CORE_BOARD)
 	/* on system and core board LED is on pin 11/PA1 */
 	#define LED_PORT A /**< GPIO port (port A) */
-	#define LED_PIN	1 /**< GPIO pin (pin PA1) */
+	#define LED_PIN 1 /**< GPIO pin (pin PA1) */
 	#define LED_ON 0 /**< LED is on when pin is low */
 #elif defined(BLUE_PILL)
 	/* on minimum system LED is on pin 2/PC13 */
@@ -373,7 +373,7 @@
 	/* on BusVoodoo LED is on pin PA8 */
 	#define LED_PORT A /**< GPIO port (port A) */
 	#define LED_PIN 8 /**< GPIO pin (pin PA8) */
-	#define LED_ON 1 /**< LED is on when pin is high */
+	#define LED_ON 1 /**< blue LED is on when pin is high, red LED is on when pin is low, LED is off when LED is floating */
 #endif
 /** @} */
 
@@ -448,17 +448,6 @@ void led_on(void);
 void led_off(void);
 /** toggle board LED */
 void led_toggle(void);
-#if defined(BUSVOODOO)
-/** set LED blinking pattern
- *  @param[in] period blue+red pattern duration in seconds (up to 3+3)
- *  @param[in] duty blue LED on duty cycle, before switching to red (0-1)
- */
-void led_blink(double period, double duty);
-/** switch on blue LED */
-void led_blue(void);
-/** switch on red LED */
-void led_red(void);
-#endif
 /** go to sleep for some microseconds
  *  @param[in] duration sleep duration in us
  */