The Basic TScratch kit comes with:

ComponentNumber    
T-Scratch Module (with mini USB download cable)
1
T-Sense (Button)
3
T-Sense (LED)3
T-Sense (Vib)1
T-Sense (Tilt)1
T-Sense (Pot)1
T-Sense (PIR)1
T-Sense (LDR)1
T-Sense (Buzzer)1
T-Pad1
Servo Motor1
Blank T-Sense base (with 3-pin)3

TSense (LED)

 

 

 

 

About: The LED (Light-Emitting Diode) works when a current is applied. Electrons recombine with electron holes within the LED, releasing energy in the form of photons, which is the light seen. Because of their low energy consumption and small size, LEDs are commonly used in general lighting, in appliances as indication lights, and traffic signals.

Description: The LEDs comes in a set of 3, with red, green, and blue colours.

Digital or Analog? Digital

Input or Output? Output

TScratch port: 12 (LED) is recommended to new users, but it may be used with any digital port on T-Scratch.


TSense (Button)

 

 

 

 

About: Buttons may be used to signal the start of a sequence, or to make a change to a currently active program. They are used in a wide variety of devices such as electronic appliances as On/Off switches.

Description: The buttons comes in a set of 3, with red, green, and blue colours.

Digital or Analog? Digital

Input or Output? Input

TScratch port: 3 (BTN) is recommended to new users, but it may be used with any digital port on T-Scratch.


TSense (Buzzer)

 

 

 

 

About: The buzzer consists of a piezo ceramic element surrounded by a metal vibration disc. When a current is applied to the buzzer, the ceramic disc contracts and expands, causing the surrounding metal disc to vibrate, and producing sound. Buzzers are used in many electronic devices such as smoke alarm systems and phones to signal users.

Description: The buzzer is a matte black circular piece.

Digital or Analog? Digital

Input or Output? Output

TScratch port: 13 (BUZZER) is recommended to new users, but it may be used with any digital port on T-Scratch.


TSense (Passive InfraRed)

 

 

 

 

About: Infrared radiation is a type of electromagnetic radiation, which we can sense as heat. The PIR sensor has two slots inside which are made out of a special material that is sensitive to infrared radiation. When an object radiating infrared energy passes by, one slot generates a positive differential change (from cold to hot) first. Then the reverse happens with the second slot as the object passes (from hot to cold); this difference is detected by the PIR sensor.

Description: The sensor consists of a dome-shaped lens covering the slots, and two orange dials on the back that can be used to control the PIR sensor’s sensitivity (right dial) and delay (left dial). Sensitivity controls the threshold before the sensor detects a hit, delay controls how long before the sensor can detect a new presence.

Digital or Analog? Digital

Input or Output? Input

TScratch port: 2 (PIR) is recommended to new users, but it may be used with any digital port on T-Scratch.


TSense (Vibration)

 

 

 

 

About: A small and sensitive film inside the sensor picks up vibrations created by movement and converts it into voltage, which is then detected by the sensor.

Description: The sensor consists of a black cylindrical piece. To distinguish it from the tilt sensor, pick it up and shake it; the tilt sensor will produce a rattling sound, the vibration sensor will not.

Digital or Analog? Digital

Input or Output? Input

TScratch port: It may be used with any digital port on T-Scratch.


TSense (Tilt)

 

 

 

 

About: A small ball inside the tilt sensor moves according to gravity. They are commonly used in games (eg. pinball) or any motion-sensitive devices like smartphones.

Description: The sensor consists of a black cylindrical piece. To distinguish it from the vibration sensor, pick it up and shake it; the tilt sensor will produce a rattling sound, the vibration sensor will not.

Digital or Analog? Digital

Input or Output? Input

TScratch port: It may be used with any digital port on T-Scratch.


TSense (Potentiometer)

 

 

 

 

About: Sliding resistors on the dial allow the output voltage to be adjusted by turning the knob. Potentiometers are commonly used in volume control knobs for electronic devices, or dimmer switches in lighting.

Description: The sensor consists of a small blue dial with an arrow that may be turned.

Digital or Analog? Analog

Input or Output? Input

TScratch port: A2 (POT) is recommended to new users, but it may be used with A1 on T-Scratch as both are analog ports.

 


TSense (Light-Dependent Resistor)

 

 

 

 

About: The LDR has a resistor that varies in resistance value depending on the amount of ambient light present; the resistance decreases when the light intensity detected increases. Because of this, they can be used to sense light. They are commonly used in automatic lights (turns on when night falls) and camera shutter controls.

Description: The sensor consists of a small disc.

Digital or Analog? Analog

Input or Output? Input

TScratch port: A1 (LDR) is recommended to new users, but it may be used with A2 on T-Scratch as both are analog ports.


TPad

 

 

 

 

 

 

 

About: The TPad is a control panel of buttons, each with unique resistance values. They are commonly used in phones and other electronic devices that require a numeric or alphabetical input, or in keyboards and number pads.

Description: The sensor consists of a four buttons arranged in a diamond shape to the left, and two additional buttons in the middle.

Digital or Analog? Analog

Input or Output? Input

TScratch port: Both A1 and A2 can be used with the TPad as both are analog ports.


Servo Motor

 

 

 

 

 

 

About: The servo motor consists of a motor (moving part) with a rotary actuator that produces a rotary motion. It is used in indication dials and any function that requires movement.

Description: The servo consists of a blue box with a translucent white knob. It comes with different types of snap-on arms that can be attached to the knob and rotated, and screws to allow the arms to be attached more securely.

Digital or Analog? Digital

Input or Output? Output

TScratch port: Any of the SRV ports 1-5 on the TScratch module can be used. Users should take care to ensure the servo is plugged in correctly, with the metal contacts facing upwards. Alternatively,  note that the brown wire is the designated ground (GND) wire. and that it should always be on the right when plugged into the TScratch module.