Introduction - If you have any usage issues, please Google them yourself
In practice, more than large ones usually drive all the way, with the use of discrete circuit bulky figure, ready to use on many occasions as a multi-channel driver IC. Commonly used in small stepper motor drive circuit can ULN2003 or ULN2803. This book is a complete test board with ULN2003. ULN2003 is high-voltage high-current Darlington transistor array series, with high current gain, high voltage, wide temperature range, with load capacity and other characteristics to meet various requirements in high-speed high-power drive system. ULN2003A Darlington transistor from the array of seven groups and the corresponding resistor network and the network of clamp diodes,