Products > Test Equipment

Test Equipment Anonymous (TEA) group therapy thread

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Specmaster:
Haha, I thought that you mentioned control, you meant proper control as in plant etc with huge great motor control centres etc  :palm:

bd139:
Same principles just a lot smaller and less dangerous to play around with :)

Think thermal control loops etc. Can use the same thing in your T12 iron as well. Left pot sets temperature and the circuit keeps it there if you replace the right pot and motor with an element and a thermistor.

tggzzz:

--- Quote from: bd139 on June 24, 2018, 09:20:38 pm ---Yes it’s a rats nest and yes it’s on a solderless breadboard. Highest frequency here is less than 3Hz though so meh :)

--- End quote ---

Until something starts oscillating at 10MHz due to parasitic inductance :(

Solderless breadboards are the work of the devil (even more than homebrew 3D printers); you spend more time debugging the breadboard than your design. Dead bug + manhattan rulez :)

bd139:
Note the decoupling caps everywhere. This wasn’t precautionary but reactive after there was some oscillation in the integrator stage.

I could have done it dead bug to be honest, got enough parts stock, but I want this to go nuts. Diagnosing stability problems and oscillation was one of the points of the exercise. At one point it was going mental and slinging it’s shit all over the place but now I know why and how to squash those problems.

As a point it is now stable, on a breadboard with shitty wiring :)

tggzzz:

--- Quote from: bd139 on June 24, 2018, 09:35:01 pm ---Note the decoupling caps everywhere.

--- End quote ---

Life's too short to watch most videos; they don't even appear in my default browser settings.


--- Quote ---This wasn’t precautionary but reactive after there was some oscillation in the integrator stage.

--- End quote ---

Tee hee. Never doubt my judgement :)


--- Quote ---I could have done it dead bug to be honest, got enough parts stock, but I want this to go nuts. Diagnosing stability problems and oscillation was one of the points of the exercise. At one point it was going mental and slinging it’s shit all over the place but now I know why and how to squash those problems.

--- End quote ---

Debugging problems with your design is fun and laudable. Debugging problems with an avoidably shitty implementation of your design is simply perverse.

But then you are a softie in financial services, so that's probably standard operating practice in your day-to-day "professional" environment :) Me a cynic? Shurely shome mishtake.

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