8 NPN darlington pair transistors in this ULN2803 IC quick look by Electronzap 

List of my videos ru-vid.comvideos www.youtube.com/@Electronzap/community for most of the diagrams I've used in my videos. www.amazon.com/shop/electronzapdotcom As an Amazon Associate I earn from qualifying purchases. Americans should check out one or more of those links before making any purchases. There's no extra cost to you. www.patreon.com/electronzap electronzap.com/ www.reddit.com/r/ElectronicsStudy/ The ULN2803 integrated circuit (IC) gives you up to 8 NPN Darlington pair transistors, without having to wire them individually.

That is dedication uploading on Christmas. Merry Christmas!

Merry Christmas and a happy new year 👍🏼

Thats an interesting chip, I will keep it in mind for switching a bit of current (500ma) Merry Christmas and a great New Year !.....cheers.

Thank You

coincidentally I opened my 'christmas bells' last night as i had lost the adapter and needed to 100% know polarity, it has the same IC to drive the little solenoids that ring the bells to play tunes, it has 9 bells.......guess its wired odd, now I need to know lol