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NE555p circuit help

simpleGuy

New Member
Are you kidding? 555 timers are an excellent introduction to ICs for newbies, and are most certainly NOT "too complex" :p
The way of understanding opamps is complex :D I'm a trainee in 3rd year and we went step by step from electrons and protons to complex schematics, components, maths.
I just wanted to say you cannot fly before you learn it. But IDK if there are NE555 kits for newbies. With one of those it's possible ofc. :p
Since NE555 has the most basic external circuit under the opamps
 

MacIntoshCZ

Active Member
The way of understanding opamps is complex :D I'm a trainee in 3rd year and we went step by step from electrons and protons to complex schematics, components, maths.
I just wanted to say you cannot fly before you learn it. But IDK if there are NE555 kits for newbies. With one of those it's possible ofc. :p
Since NE555 has the most basic external circuit under the opamps
Excuse US =) we should start here:
 

crutschow

Well-Known Member
Most Helpful Member
Okay, here are the basics of the 555 operation, which may help:

The 555 operation is fairly simple.
It is a level-triggered latch (flip-flop) with a an added DIScharge output to reset the timing capacitor.

When the TRIG voltage goes below 1/3 Vcc, the latch is set (OUT high and DIS open).

If the TRIG voltage is back above 1/3 Vcc, then when the THRS voltage goes above 2/3 Vcc, the latch is reset (OUT low, and DIS connected to ground to discharge the timing capacitor).

It stays low until a low on the TRIG input again sets the latch (if the THRS voltage is below 2/3 Vcc).

From that you should be able to understand the operation of the 555 in it's various modes of operation, such as astable and monostable multivibrator.
 

DerStrom8

Super Moderator
... But, simply the 555 is not an "Opamp"!
I was going to say the same thing. For a "trainee in 3rd year" you'd think you'd know the difference between an "op-amp" and a "timer" IC. Not making a very strong argument here....
 

DerStrom8

Super Moderator
But IDK if there are NE555 kits for newbies. With one of those it's possible ofc. :p
Why on earth do you think you need a kit? Just get a breadboard and some wires and you have one of the most universal "kits" available on the market.
 

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