The ULN2003 datasheet specifies that it is a high-voltage high-current Darlington transistor array. Each consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode ...

The ULN2003 IC is an extremely versatile part, and with the help of [Hulk]’s deep dive, you might just get some new ideas about how to use this part in your own projects. Inside the ULN2003 y… ...

Datasheets usually include these schematics so that engineers know what to expect from the hardware. But knowing what a resistor or transistor looks like on the die is another story altogether.