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Topic: transistor selection? (Read 4102 times) previous topic - next topic


Yes, the cap on the chip's +5 pin will help with stable operation.

Are you using SPI.transfer() to send data to the chip, or shiftout()?
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


shiftOut(), with local code written by another no-longer-active-on-the-forum arduino user. I think he was not able to get the canned shiftOut() to work as he wished, so he wrote his own. Some of my research referenced SPI and I pretty much ignored those posts, as they were not applicable and would have thrown a bigger wrench in the works than a new shift register and common anode led module.

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