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2 questions
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Port expander with high side switch ground dilemma
I have a design wherein the basic idea is to control individual LED strings and dim (analog dimming) them using Pi Pico via I2C interface.
This board is the LED driver which will be connected to the ...
- 79
2
votes
3
answers
723
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Controlling 13 outputs with a mcp23017 or 74hc595 and two uln2003?
I need to drive 13 20ma (constant) loads with a single microcontroller with only 5 available pins. My first thought was to just use a mcp23017 or some 74hc595's but after reading the datasheets it ...
- 827