Simple Servo Tester

Step 3 Make: 555 Timer

Insert the 555 timer chip. Be sure that the notch faces to the right as pictured here.

Comments

[BOOJAN]

nooo...you are making a huge mistake. First resistors, jumpers and other small components, after that capacitators, diodes, IC's and finally potentiometers goes last. If you place the IC first you are risking to burn it while you are soldering other components.

[W9GFO]

Huge mistake?  I think that is a slight exaggeration.

I'll agree that it is good practice to save the chips until the end but for this board there are so few components that it really makes no difference. I also usually like to start with the lowest height components first, but again, this board is small enough that it is easier to just start in the middle and work outwards.

However, for anyone concerned about burning up the 555 chip, go ahead and put it in last, there is no reason why that wouldn't work just as well.

Rich H

[BOOJAN]

i exaggerate a little bit with that huge mistake, i was sleepy then and i've didnt know what i was writing, and i agree with what you are saying, first place the lowest height components, and then go bigger and bigger

[Unit042]

This is a nice project, but the schematic is quite confusing, perhaps you could add another schematic where the components are not all over the place? I mean, I don't intend to insult your efforts, it's just hard to read what with all of the 90 degree angle wire web....

Anyway, I just solder on an IC socket first, then transistors, because they have pins so close together. It's hard to solder around a tone of resistors, capacitors, etc, as my soldering iron tip is not quite what it sould be. (it hits other stuff because of its thickness, very annoying)

Just a thought.....

[bowmaster]

Or ypu could do what I do. Randomly grab something, solder it in, repeat.

[BOOJAN]

yup...my classmates are doing that...and they usually end up with burned ICs, a big smoke of capacitator, if it is a smaller value it will end up with huge BANG, burned transistors...etc...