combination

so i build digital combination lock for my projects from this website : Digital Lab - Digital Combination Lock | Digital IC Projects | Electronics Textbook (allaboutcircuits.com) and i added a solenoid door lock (5v) and it doesnt work. i think the problem was the current is too low to make the...

Hello all. I am working on a pre-lab for my DC circuits class and this question has me a bit stumped. I have been asked to calculate the following: Resistance of BD Resistance Total Resistance of BC Resistance of CD I understand the series and parallel equations for resistance, but I am...