I show how pull up and pull down resistors can help prevent false triggering of an otherwise floating input pin. I can easily get an NPN (2N3904) or PNP (2N3906) transistor to start conducting by touching a conductive area attached to the floating base pin. https://www.youtube.com/c/electronzap https://www.amazon.com/shop/electronzapdotcom As an Amazon Associate I earn from qualifying purchases. https://www.patreon.com/electronzap https://www.twitch.tv/electronzap I now do my gaming, Fallout 4 for the time being, on Twitch. #NPN #BJT #electronics ... https://www.youtube.com/watch?v=b68my45ETiY

List of my videos https://www.youtube.com/c/electronzap/videos https://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. https://electronzap.com/ https://www.reddit.com/r/ElectronicsStudy/ #Electronics #Howto #diy ... https://www.youtube.com/watch?v=u7Hdh9BtgC8

I talk about the trimmer potentiometer, commonly called a trimpot. The trimpot behaves like the larger potentiometer, but has pins that can fit in a breadboard, although the pins are larger than most component leads, and therefore streth out the slots the are inserted a bit. therefore, I usually leave the trimpot where I inserted it. I show how you can get a variable resistance from the trimpot by multimeter resistance measuring the resistance between one input or the other, and the output. Then, I show how you can get a variable voltage by wiring both inputs to opposite sides of the power source, and can get a fully adjustable voltages, from 0 volts up to the power source voltage (in this video I used a 5V breadboard power supply). Then I use the trimpots as voltage dividers to control when LEDs turn on or off, and how bright they are when they are on. The voltage from the output needs to exceed the forward vooltage of the LEDs. About 1.6V for a single LED, and about 3.2V for 2 series LEDs. https://www.patreon.com/electronzap https://www.twitch.tv/electronzap https://twitter.com/electronzap https://www.facebook.com/electronzap/ https://www.reddit.com/user/electronzapdotcom https://www.reddit.com/r/ElectronicsStudy/ https://www.pinterest.com/electronzap/ ... https://www.youtube.com/watch?v=Atkb3CfvSk8

Full playlist https://youtube.com/playlist?list=PLsAJMThMEUtrxsJ3-Hqg6BuyqWm19_NEc List of my videos https://www.youtube.com/c/electronzap/videos https://www.patreon.com/electronzap https://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. https://electronzap.com/ https://www.reddit.com/r/ElectronicsStudy/ #Electronics #Howto #diy ... https://www.youtube.com/watch?v=K_W9R_Nux4M