Electronics > Projects, Designs, and Technical Stuff

Using jumpers to quickly swap components

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tggzzz:

--- Quote from: HendriXML on February 21, 2019, 12:52:26 am ---
--- Quote from: KL27x on February 21, 2019, 12:37:50 am ---I spent a couple years making "useful stuff" like this. I think it's just a phase some of us go through. :) Prediction. In 2 years, you will be using mostly smd parts and swapping them out with a hot air station.

--- End quote ---
Just curious, but how does one prototype with smd parts without using designed pcb’s?

--- End quote ---

Breakout boards.

SMD friendly prototyping boards.  http://www.busboard.com/surfacemountpcbs https://github.com/electroniceel/protoboard http://www.talkingelectronics.com/EM/Matrix%20Boards/MatrixBoards.html

Manhattan techniques, especially for decoupling in RF circuits.

All those are better than solderless breadboards, but then anything is better than solderless breadboards.

Zero999:

--- Quote from: Audioguru on February 21, 2019, 03:31:13 am ---
--- Quote from: james_s on February 20, 2019, 09:58:51 pm ---I mean did you come here to help, or just to show off how smart you are?

--- End quote ---
My help is for you to read the spec's in the datasheets then calculate what is needed to meet them. Also to buy quality components.
A model was mentioned, for a simulation? Most simulations simply use "typical" active parts, ignoring minimum and maximum spec's so some of the assembled circuits will not work. You can either throw away the ones that don't work or fiddle with them if all the spec's were ignored.

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Yes some SPICE models are poor, especially at simulating the output stage of op-amps. I've had problems with the TL072 model showing it sinking current when the output is saturated to the positive rail and I remember someone saying they simulated an LM358 circuit and the model suggested it can sink 10mA, with the output at only 100mV, with respect to the op-amp's negative supply.  :palm: Datasheets are generally better than SPICE models but are still often imperfect, so it makes sense to prototype.

Nusa:
I've been known to put components on protoboards (dead-bug style if they don't go directly) to create breakouts to header pins. Then I can use the square header pins as wire-wrap posts to connect things up. I've got some long headers for cases where I expect to need several wraps.

I'm also fine soldering mod wires when that's appropriate, but no reason to throw out techniques learned 45 years ago, and tools I already own, that still work.

netdudeuk:

--- Quote from: Nusa on February 22, 2019, 11:45:55 am ---I've been known to put components on protoboards (dead-bug style if they don't go directly) to create breakouts to header pins. Then I can use the square header pins as wire-wrap posts to connect things up. I've got some long headers for cases where I expect to need several wraps.

I'm also fine soldering mod wires when that's appropriate, but no reason to throw out techniques learned 45 years ago, and tools I already own, that still work.

--- End quote ---

I've done something similar.

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