ProtoCentral tinyGSR is a Galvanic Skin Response (GSR) / Electrodermal Activity (EDA) measurement breakout board that allows you to measure and track your physiological responses in real time. GSR measures the changes in electrical conductivity / Electrodermal acivity of the skin, providing valuable insights into a person’s emotional state and stress levels. When a person is emotionally aroused or stressed, their sweat gland activity increases, which can be measured as changes in the electrical conductivity of the skin.
tinyGSR contains onboard analog op-amps to measure this change in resistance and helps you to easily interface this with your microcontroller system using just a digital interface. tinyGSR can be a powerful tool for anyone looking to better understand their body and emotions. The tinyGSR has Qwiic compatible connector, in addition to standard breakout headers to just plug it into any compatible board with no soldering required.
Features
- Texas Instruments TLA2022 12-Bit Delta-Sigma ADC
- Texas Instruments LM324P Quadruple Operational Amplifiers
- Measures conductance of skin
- Programmable Data Rate: Up to 3.3 kSPS
- Programmable Gain: ±256 mV to ±6.144 V
- Low Current: 150 µA
- Supply Range: 2 V to 5.5 V
- Two I2C address selectable (3-way jumper provided)
- Qwiic (I2C/TWI) Compatible Interface
- Dimensions: 20×20 mm
Includes
- ProtoCentral tinyGSR breakout board
- Straight pin headers
- 2-electrode connector cable with stereo jack
- 10x disposable stick-on bio-potential electrodes
srl proereal (verified owner) –
ottimo prodotto per precisione ma manca la formula per passare da valore analogico a valore in ohm della resistenza
excellent product for precision but the formula for switching from analogue value to ohm value of the resistance is missing
Roberto Santandrea –
purtroppo devo cambiare parere, manca assistenza e anche se si scrivono ticket nessuno risponde inoltre non funziona correttamente dopo 20 30 secondi di rilevazione va piano piano a 0 il valore. SPero qualcuno risponda
KG –
I have experimented with the tinyGSR breakout board along with the Arduino library provided in this repository. However, a significant drawback is that the code only reads the ADC values and does not offer any formula or method to convert these ADC readings into EDA/GSR values, which is essential for evaluating the galvanic skin response.
In practical applications, users must derive their own conversion method based on the voltage divider principle and calibrate the circuit accordingly. This can lead to confusion and requires additional time to experiment and determine the correct formula.
It would be highly beneficial if the developers could add detailed information on converting ADC readings to EDA/GSR, along with complete sample code. This would enable users to implement the functionality immediately and reduce the hassle of calibrating the circuit themselves.