Tagged Questions

1
vote
3answers
74 views

Higher resistance resistor in place of higher wattage?

Engineering newbie here. I'm fairly sure I already know the answer to the question, but I figure I'll ask anyway. I've got an LED lying around, that according to an LED calculator requires a 80R 1/2w ...
-3
votes
1answer
96 views

having problem in creating 555 oscillator in breadboard [closed]

i am quite new in electronics department and so have a very little knowledge about it...ok so i am going to set up a 555 oscillator.....i have the 555 timer chip, a solderless breadboard and resistors ...
5
votes
2answers
321 views

Using multiple resistors on a breadboard to limit voltage to LED

so I've recently begun my venture into electrical engineering, just got myself a breadboard with some jumper cables, a pack of assorted LED's and a few 200 ohm resistors. I'm trying to understand how ...
3
votes
1answer
331 views

Help breadboarding a circuit?

I've been building a light based alarm system, using an LDR, Op Amp, AND gate, some resistors, and an output of buzzers.. Here's my circuit so far... It beeps when it senses light as well as being ...
3
votes
6answers
765 views

Variable resistor

I'm starting with electronics and I don't have a lot of resistors. Every new project I try to do, I have to buy new resistors, but they take a long time to arrive. What's the solution? What variable ...