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Help on I2C question

clem57 over 10 years ago

Looking for a method/device to address as I2C to turn on/off 12+ volts. It needs to be very small and can have an address set. I will have around 50 different addresses to control 3 lights.

Thanks

Clem

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bobcroft over 10 years ago +1

Clem, Not I2C but SPI. Have a look at Majenko.co.uk he does a 32 port IO expander board and up to 4 can be used on 4 wires from the Arduino i.e. 128 IO! I use these to drive banks of 8 relays via opto…

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0 binarygenius over 10 years ago

does it have to be i2c because there is a lot of ways to address 50 transistors switching 12v+ but if you have to use i2c maybe a port expander with transistors connected could work something like Expanding the number of I/O lines using Microchip MCP23008 | Embedded Lab it would help if you could say more about the project.
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0 binarygenius over 10 years ago

does it have to be i2c because there is a lot of ways to address 50 transistors switching 12v+ but if you have to use i2c maybe a port expander with transistors connected could work something like Expanding the number of I/O lines using Microchip MCP23008 | Embedded Lab it would help if you could say more about the project.
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