Analog and ADC breakout boards
SparkFun I2C DAC Breakout - MCP4725 is a digital to analog converter that can be used for any kind of creative projects.
MAX30003 is a single-lead ECG monitoring IC which has built-in R-R detection and several other features that make it perfect for a wearable single-lead ECG application.
This incredibly small stereo amplifier is surprisingly powerful - able to deliver 2 x 2.1W channels into 4 ohm impedance speakers (@ 10% THD).
Thermocouple Amplifier with 1-Wire Breakout Board - MAX31850K offers an easy interface with breakout boards.
Adafruit Audio FX Sound Board - WAV/OGG Trigger with 2MB Flash is a one solution for all your audio needs.
Using only two pins, control 16 free-running PWM outputs! You can even chain up 62 breakouts to control up to 992 PWM outputs (which we would really like to see since it would be glorious)
ADS1262 breakout board is a 32 bit precision which is higher than the earlier 24 bit.
SparkFun FM Tuner Evaluation Board - Si4703 connects to all the FM radio stations and also displays the content from the radio wave.
SparkFun Analog/Digital MUX Breakout - CD74HC4067 is a great way to connect multiple sensors even upto 16 sensors
This is a breakout board for the TI ADS1292R Analog front-end IC for ECG and respiration measurement. This is a simple board to add ECG/Respiration measurement capability to your Arduino, Raspberry Pi or other microcontroller of choice.
If your design demands high precision analog measurements, this new breakout board for the ADS1220 24-bit Sigma-delta ADC can get the job done.
For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1015 provides 12-bit precision at 3300 samples/second over I2C.