Vertical Sync sensor - Revision history

Wilbert.vanham at 10:42, 23 January 2023

2023-01-23T10:42:59Z

2022-12-06T12:49:36Z

BITSI Protocol

2022-12-06T10:32:10Z

2022-12-06T07:57:40Z

2022-12-06T07:18:11Z

Python/PsychoPy

2022-12-06T07:16:49Z

Python/PsychoPy

2022-11-18T07:12:57Z

2022-11-18T07:12:32Z

2022-11-16T10:42:13Z

Python/PsychoPy

2022-11-16T10:41:30Z

@@ Line 21: / Line 21: @@
 }}
-The Vertical Sync sensor is used on a computer/laptop monitor for time accurate visual presentation. The sensor measures screen brightness. It generates a BITSI trigger to the com-port("A" = ON/light, "a" = OFF/noLight) when the amount of light is higher than the (customizable) threshold. This means that the onset of visual stimulus on screen can be marked. It can easily be attached with a pincher to the screen. The Vertical Sync sensor is connected to a computer with a usb connection, a serial port is emulated.
+The Vertical Sync sensor is used on a computer/laptop monitor for time accurate visual presentation. The sensor measures screen brightness. It generates a BITSI trigger to the com-port("A" = ON/light, "a" = OFF/noLight) when the amount of light is higher than the (customizable) threshold. This means that the onset of visual stimulus on screen can be marked. It can easily be attached with a pincher to the screen. The Vertical Sync sensor is connected to a computer with a usb connection, a serial port is emulated. You may want to read about [[presentation modes]] in order to decide how to use the sync sensor.
 == BITSI Protocol ==

@@ Line 38: / Line 38: @@
 |}
-This means that when light falls on the sensor, a capital A will be sent to the serial port. A lowercase 'a' will be sent when the signal is deactivated(no light).
+Meaning when light falls on the sensor, a capital A will be sent to the serial port. A lowercase 'a' will be sent when the signal is deactivated(no light).
 ===Output===

@@ Line 21: / Line 21: @@
 }}
-The Vertical Sync sensor is used on a computer/laptop monitor for time accurate visual presentation. The sensor measures screen brightness. It generates a BITSI trigger to the com-port("A" = ON/light, "a" = OFF/noLight) when the amount of light is higher than the (customizable) threshold. This means that the exact onset of visual stimulus on screen can be marked. It can easily be attached with a pincher to the screen. The Vertical Sync sensor is connected to a computer with a usb connection.
+The Vertical Sync sensor is used on a computer/laptop monitor for time accurate visual presentation. The sensor measures screen brightness. It generates a BITSI trigger to the com-port("A" = ON/light, "a" = OFF/noLight) when the amount of light is higher than the (customizable) threshold. This means that the onset of visual stimulus on screen can be marked. It can easily be attached with a pincher to the screen. The Vertical Sync sensor is connected to a computer with a usb connection, a serial port is emulated.
 == BITSI Protocol ==

← Older revision		Revision as of 07:57, 6 December 2022
Line 1:		Line 1:
		+	{{Infobox tsg
		+	\| name = Vertical Sync sensor
		+	\| image = sensorPic.jpg
		+	\| caption = Vertical Sync sensor
		+	}}
	{{Infobox tsg		{{Infobox tsg
	\| name = Seeed Studio XIAO SAMD21		\| name = Seeed Studio XIAO SAMD21

@@ Line 89: / Line 89: @@
 === Python/PsychoPy ===
-<br/>'''The basic'''
+<br/>'''The basics using the Vertical Sync sensor in PsychoPy:'''
 <syntaxhighlight lang="python" line>
@@ Line 101: / Line 101: @@
 </syntaxhighlight>
-<br/>'''Example using the Vertical Sync sensor in PsychoPy:'''
+<br/>'''Example script using the Vertical Sync sensor in PsychoPy:'''
 <syntaxhighlight lang="python" line>

← Older revision		Revision as of 07:16, 6 December 2022
Line 88:		Line 88:

	=== Python/PsychoPy ===		=== Python/PsychoPy ===
		+
		+	<br/>'''The basic'''
		+
		+	<syntaxhighlight lang="python" line>
		+	# initialize treshold for OFF by sending a code
		+	ser.write(b'1')
		+
		+	visual.Rect(win, .15, .25, pos=(-1, 1),fillColor="white", units="norm").draw()
		+	win.flip()
		+	# wait for a sync square
		+	b = ser.read()
		+	</syntaxhighlight>

	<br/>'''Example using the Vertical Sync sensor in PsychoPy:'''		<br/>'''Example using the Vertical Sync sensor in PsychoPy:'''

@@ Line 37: / Line 37: @@
 ===Output===
-The treshold for OFF is customizable and can be specified by sending a byte to specify the value for screen OFF. Any byte satisfies, see example code.
+The treshold for monitor OFF is customizable and can be specified by sending a byte to specify the value for screen OFF. Any byte satisfies, see example code.
 == Port Settings ==

@@ Line 116: / Line 116: @@
 rect.draw()
 win.flip()
-tok = time.perf_counter()
+tik = time.perf_counter()
 # wait for a sync square
 b = ser.read()
-tik = time.perf_counter()
+tok = time.perf_counter()
 # show delay after a flip
-print("your timing after a flip: {}s".format(tik-tok))
+print("your timing after a flip: {}s".format(tok-tik))
 # as a remark 60Hz/~0.016s 120Hz/~0.008s

@@ Line 16: / Line 16: @@
 }}
-The Vertical Sync sensor is used on a computer/laptop monitor for time accurate visual presentation. The sensor measures screen brightness. It generates a BITSI trigger("A" = ON/light, "a" = OFF/noLight) when the amount of light is higher than the (customizable) threshold, which means that the exact onset of any visual stimulus can be marked. It can easily be attached to any screen with a pincher. The Vertical Sync sensor is connected to a computer with a usb connection.
+The Vertical Sync sensor is used on a computer/laptop monitor for time accurate visual presentation. The sensor measures screen brightness. It generates a BITSI trigger("A" = ON/light, "a" = OFF/noLight) when the amount of light is higher than the (customizable) threshold. This means that the exact onset of visual stimulus on screen can be marked. It can easily be attached with a pincher to the screen. The Vertical Sync sensor is connected to a computer with a usb connection.
 == BITSI Protocol ==