<!-- TITLE: Equipment for measuring SCR --> <!-- SUBTITLE: --> > From a conversation with Alex + Suggestion for the microphones: [get an array](https://www.google.com/search?client=firefox-b-1-d&q=microphone+array+multidirectional), or [this one](https://medium.com/kkbankol-events/raspberry-pi-15662c3ca881) + Just make a simple [op-amp circuit](https://www.google.com/search?client=firefox-b-1-d&q=op-amp) + Mentioned an [analog front-end](https://en.wikipedia.org/wiki/Analog_front-end) which apparently is a teakable analog signal-processing module. Never heard of it. + Said the [particle](https://docs.particle.io/) is dope -- and [here](https://www.adafruit.com/product/2724) + [e4 by empatica](https://www.empatica.com/research/e4/) is nice, but clunky (this is what + Suggested [ESP32 microcontroller](https://www.google.com/search?client=firefox-b-1-d&q=esp32) might be useful -- has wifi integrated. There are [development boards available](https://www.gridconnect.com/products/esp-devkitc-esp32-module-development-kit) or [this](https://www.amazon.com/HiLetgo-ESP-WROOM-32-Development-Microcontroller-Integrated/dp/B0718T232Z) + Recommended [Teensy Arduino](https://www.pjrc.com/teensy/teensyduino.html), [buy here](https://www.adafruit.com/product/4323). Said it was badass. Very sensitive signal inputs for example. + Suggestion for the EDA sensor: + [bitalino](https://bitalino.com/en/22-r-evolution-quick-start-guide/108-eda) ([manual](https://bitalino.com/datasheets/REVOLUTION_BITalino_Board_Kit_Datasheet.pdf)), using [open signals interface](https://plux.info/software/43-opensignals-revolution-000000000.html) ([manual](https://opensignals.net/OpenSignals_(r)evolution_User_Manual-print.pdf), [quickstart](https://bitalino.com/downloads/quick_start_guide/quickstart-guide-1.0.0.3-print.pdf)). This requires a few components: + [cable](https://plux.info/cables/227-2-lead-electrode-cable.html), [EDA sensor](https://plux.info/sensors/11-electrodermal-activity-eda-sensor.html) ([data sheet](https://bitalino.com/datasheets/EDA_Sensor_Datasheet.pdf)) + [reusable electrodes](https://plux.info/electrodes/60-non-gelled-reusable-agagcl-electrodes.html) (€12.50 / 25pc) + [the whole deal, with everything you need](https://plux.info/kits/33-bitalino-revolution-board-bt-810121001.html) €149.00 handles four sensors! + [I guess there's also more advanced stuff](https://plux.info/18-biosignalsplux-wearables) €1,000+ [Innovations in electrodermal activity collection and signal processing](https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiNuqXFn6zrAhXDq1kKHd-3DMAQFjAAegQIARAB&url=https%3A%2F%2Fwww.mdpi.com%2F1424-8220%2F20%2F2%2F479%2Fpdf&usg=AOvVaw0k9QMnOOH1PgWNqyWNCQt0) [proximity sensors detected!](https://www.meriac.com/openbeacon#overview) from [Milosch Meriac](https://www.meriac.com/#about) and [Twit](https://twitter.com/FoolsDelight)