Electronics > Projects, Designs, and Technical Stuff
Playable electronic modules - modules in action
HendriXML:
This picture show why the turned pins I received are worthless! Some have internal connections some don't. This could have been horrible in an serious application of these pin headers!
HendriXML:
--- Quote from: Gyro on March 09, 2019, 06:54:18 pm ---
It will still be a bit of a mental leap (especially for a young mind) to understand that a lit LED actually signifies a low on the output of the inverter and hence a high on the input.
--- End quote ---
The led corresponds to the state of the switch though. But you may well be right, it is something I’m not sure about. It will be the next module I’ll implement. Inverting is a simple operation, but a difficult one for the brain. If it’s to hard to grasp I will split the dual function module into seperate onces. And keep the difficult one for later.
I previously made a LED output module (old style: components on top, will be recreated). I think it works with 2N7000’s, that one “should” be used to show outputs.
nctnico:
--- Quote from: HendriXML on March 09, 2019, 07:23:26 pm ---This picture show why the turned pins I received are worthless! Some have internal connections some don't. This could have been horrible in an serious application of these pin headers!
--- End quote ---
Better buy good ones then. Get real ones from (for example) Samtec.
Nusa:
If you've got white space on the label, put something useful on it. Such as the truth table for the operation. Or perhaps the alternate representation for the same gate. (e.g. a NAND gate is the same thing as an OR gate with inverted inputs)
Gyro:
--- Quote from: HendriXML on March 09, 2019, 08:08:34 pm ---
--- Quote from: Gyro on March 09, 2019, 06:54:18 pm ---
It will still be a bit of a mental leap (especially for a young mind) to understand that a lit LED actually signifies a low on the output of the inverter and hence a high on the input.
--- End quote ---
The led corresponds to the state of the switch though. But you may well be right, it is something I’m not sure about. It will be the next module I’ll implement. Inverting is a simple operation, but a difficult one for the brain. If it’s to hard to grasp I will split the dual function module into seperate onces. And keep the difficult one for later.
I previously made a LED output module (old style: components on top, will be recreated). I think it works with 2N7002’s, that one “should” be used to show outputs.
--- End quote ---
Yes sure, the LED will follow the state of the inverter input, just not the output (I guess it depends where you position them as to how much sense it makes). If you are trying to save work (and are doing PCBs) then maybe you can use the same one, populated with either output pins or LEDs + resistors. Then you could simply use different labels - Inverter module for one, display module for the other.
Still soldering effort but less than two different designs. Just a thought.
P.S. Those sockets are terrible, I trust you're not going to pay for them! You don't really need the cost of turned pin sockets for a project like this - locally sourced flat spring contact ones will be fine. Easier to swap the ICs too (proper turned pin sockets hold on very tight!).
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