Converters

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2.99
Sparkfun, USA

If you've ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. The SparkFun bi-directional logic level converter is a small device that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time.

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6.50
Adafruit, USA
This breakout board features the easy-to-use MCP4725 12-bit DAC.
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6.20
Sparkfun, USA
The MCP4725 is an I2C controlled Digital-to-Analog converter (DAC).
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9.80
Adafruit, USA
The TXB0108 bi-directional level converter comes in! This chip perform bidirectional level shifting from pretty much any voltage to any voltage and will auto-detect the direction.
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4.90
Adafruit, USA
This breakout has 4 BSS138 FETs with 10K pullups. It works down to 1.8V on the low side, and up to 10V on the high side.
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12.20
Adafruit, USA
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. 
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18.40
Adafruit, USA
For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1115 provides 16-bit precision at 860 samples/second over I2C. 
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7.90
Converter, OEM, China
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.
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8.50
Adafruit, USA
Finally, a way to get up to 8 same-address I2C devices hooked up to one microcontroller - this multiplexer acts as a gatekeeper, shuttling the commands to the selected set of I2C pins with your command.
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3.90
Converter, OEM, China
Raspberry Pi  8 channel Level Switching (3.5V to 5V) IO Module Logic Level Converter is able to convert signals from 5V down to 3.3V (and vice versa)...
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3.90
The   PCF8574 IO Expansion Board   is used as remote 8-bit I/O expander for I2C-bus. Up to 8   PCF8574 IO Expansion Board   can be connected to the...
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8.90
Waveshare, China
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6.90
Waveshare, China
The  PCF8591 AD DA Board  features an 8-bit A/D Converter & D/A Converter PCF8591 with four analog inputs, one analog output and a serial I2C-bus...
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2.40
OEM, 38168, China
The PCF8574 IO Expansion Board is used as remote 8-bit I/O expander for I2C-bus. Up to 8 PCF8574 IO Expansion Board can be connected to the I2C-bus,...
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