diff --git a/Timelapse_keyboard/Readme.md b/Timelapse_keyboard/Readme.md
index fad2b00..e124af5 100644
--- a/Timelapse_keyboard/Readme.md
+++ b/Timelapse_keyboard/Readme.md
@@ -19,7 +19,7 @@ To get precision time this tool use GPS module (NEO-6M)
 
 #### Connection diagram
 | Pin  | Function  |
-| :-: |:-|
+| :--: | :-------- |
 | PA0 | Infrared sensor data |
 | PA1 | Laser photoresistor data |
 | PA2 | GPS Rx (MCU Tx) |
@@ -27,7 +27,7 @@ To get precision time this tool use GPS module (NEO-6M)
 | PA4 | GPS PPS signal |
 | PA5 | Trigger (button) switch |
 | PB10 | Ultrasonic "TRIG" pin |
-| PB11 | Ultrasonic "ECHO" pin|
+| PB11 | Ultrasonic "ECHO" pin |
 
 #### Powering devices
 * To power up GPS module you can use +5V or +3.3V.
diff --git a/Timelapse_keyboard/main.c b/Timelapse_keyboard/main.c
index 7035689..c2a5553 100644
--- a/Timelapse_keyboard/main.c
+++ b/Timelapse_keyboard/main.c
@@ -64,7 +64,7 @@ int main(void){
 	rcc_clock_setup_in_hse_8mhz_out_72mhz();
 	// init systick (1ms)
 	systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8); // Systyck: 72/8=9MHz
-	systick_set_reload(8999); // 9000 pulses: 1kHz
+	systick_set_reload(STK_RVR_DEFAULT_VAL); // 9000 pulses: 1kHz
 	systick_interrupt_enable();
 	systick_counter_enable();
 
@@ -98,7 +98,7 @@ int main(void){
 			GPS_parse_answer(string);
 		}
 		if(trigger_ms != DIDNT_TRIGGERED && trigger_ms != Timer){
-			if(msctr - trigrtm > 500 || trigrtm > msctr){
+			if(msctr - trigrtm > TRIGGER_DEBOUNCE_DELAY || trigrtm > msctr){
 				trigrtm = msctr;
 				P("Trigger time: ");
 				print_time(&trigger_time, trigger_ms);
@@ -107,7 +107,7 @@ int main(void){
 		}
 		for(i = 0; i < ADC_CHANNEL_NUMBER; ++i){
 			if(adc_ms[i] != DIDNT_TRIGGERED && adc_ms[i] != Timer){
-				if(msctr - adctm[i] > 500 || adctm[i] > msctr){
+				if(msctr - adctm[i] > ADC_DEBOUNCE_DELAY || adctm[i] > msctr){
 					adctm[i] = msctr;
 					P("ADC");
 					put_char_to_buf('0'+i);
@@ -125,7 +125,7 @@ int main(void){
 			}
 		}
 		if(ultrasonic_ms != DIDNT_TRIGGERED && ultrasonic_ms != Timer){
-			if(msctr - ultrasonictm > 500 || ultrasonictm > msctr){
+			if(msctr - ultrasonictm > ULTRASONIC_DEBOUNCE_DELAY || ultrasonictm > msctr){
 				ultrasonictm = msctr;
 				P("Ultrasonic time: ");
 				print_time(&ultrasonic_time, ultrasonic_ms);
diff --git a/Timelapse_keyboard/main.h b/Timelapse_keyboard/main.h
index 2f71378..ebfcd50 100644
--- a/Timelapse_keyboard/main.h
+++ b/Timelapse_keyboard/main.h
@@ -50,6 +50,14 @@ extern void *memcpy(void *dest, const void *src, int n);
 
 #define DIDNT_TRIGGERED (2000)
 
+// debounce delays:
+// Trigger (button) - 500ms
+#define TRIGGER_DEBOUNCE_DELAY     (500)
+// ADC debounce - 1000ms
+#define ADC_DEBOUNCE_DELAY         (1000)
+// ultrasonic - 1500ms
+#define ULTRASONIC_DEBOUNCE_DELAY  (1500)
+
 typedef struct{
 	uint8_t H;
 	uint8_t M;
diff --git a/Timelapse_keyboard/timelaps.bin b/Timelapse_keyboard/timelaps.bin
index 4f324dd..aa15558 100755
Binary files a/Timelapse_keyboard/timelaps.bin and b/Timelapse_keyboard/timelaps.bin differ
diff --git a/Timelapse_keyboard/usbkeybrd.c b/Timelapse_keyboard/usbkeybrd.c
index 85c1165..095d382 100644
--- a/Timelapse_keyboard/usbkeybrd.c
+++ b/Timelapse_keyboard/usbkeybrd.c
@@ -37,9 +37,9 @@ const struct usb_device_descriptor dev = {
 	.bDeviceSubClass = 0,
 	.bDeviceProtocol = 0,
 	.bMaxPacketSize0 = 64,
-// 0x03EB 0x2042  -  Atmel Keyboard Demo Application
-	.idVendor = 0x03EB,
-	.idProduct = 0x2042,
+// 0x045E 0x005C  - Microsoft Office Keyboard (106/109)
+	.idVendor = 0x045E,
+	.idProduct = 0x005C,
 	.bcdDevice = 0x0200,
 	.iManufacturer = 1,
 	.iProduct = 2,
@@ -154,7 +154,7 @@ const struct usb_config_descriptor config = {
 };
 
 static const char *usb_strings[] = {
-	"Simple matrix keyboard 3x4",
+	"Timelapse keyboard",
 	"EEV",
 	"v01",
 };