4x4 Keyboard Matrix using 20M2
- Thread starter RED-EYE
- Start date
westaust55
Moderator
In case it is not in a "standard" matrix format can I suggest that you post a link to the keypad datasheet or provide a schematic diagram for it.
Then post a schematic diagram showing how you have it connected to the PICAXE so we know which IO pins you are using.
Here is a link to a typical keypad wiring diagram:
http://www.altronics.com.au/index.asp?area=item&id=S5383
It may be advantageous to post your code as tried thus far so folks can see what you are trying to do and where you have gone wrong.
Then post a schematic diagram showing how you have it connected to the PICAXE so we know which IO pins you are using.
Here is a link to a typical keypad wiring diagram:
http://www.altronics.com.au/index.asp?area=item&id=S5383
It may be advantageous to post your code as tried thus far so folks can see what you are trying to do and where you have gone wrong.
Last edited:
hi red-eye,
Think you should have done a forum search, but to get you started look at hippy method http://www.picaxeforum.co.uk/showthread.php?14001-20X2-4x4-keypad-scanner&highlight=keypad+20x2 their are a few ways of scanning a keypad but hippy's method is by far one of the best I've seen. Hopefully it will work on a M2.
Think you should have done a forum search, but to get you started look at hippy method http://www.picaxeforum.co.uk/showthread.php?14001-20X2-4x4-keypad-scanner&highlight=keypad+20x2 their are a few ways of scanning a keypad but hippy's method is by far one of the best I've seen. Hopefully it will work on a M2.
Sorry cant upload image as them forum wouldn't let me for the keyboard! But the schematic digram for the connection can be anything it doesn't matter!In case it is not in a "standard" matrix format can I suggest that you post a link to the keypad datasheet or provide a schematic diagram for it.
Then post a schematic diagram showing how you have it connected to the PICAXE.
Thanks I will look into that!hi red-eye,
Think you should have done a forum search, but to get you started look at hippy method http://www.picaxeforum.co.uk/showthread.php?14001-20X2-4x4-keypad-scanner&highlight=keypad+20x2 their are a few ways of scanning a keypad but hippy's method is by far one of the best I've seen. Hopefully it will work on a M2.
With respect it does a keypad is made up of rows and columns you got too work that out or use the data sheet,.But the schematic digram for the connection can be anything it doesn't matter!
Could you explain further please?Sorry cant upload image as them forum wouldn't let me for the keyboard! But the schematic digram for the connection can be anything it doesn't matter!
The Forum accepts a wide variety of formats.
e
inglewoodpete
Senior Member
Further to that, if the item is illustrated or for sale on line, you could post a link to the item.Could you explain further please?
The Forum accepts a wide variety of formats.
e
I have used 16-key keypads that use a 1x16 (17 pins), 2x8 (10 pins) and 4x4 (8 pins) matrix. How have you wired it to your PICAXE?
If you want help, you need to be specific.
p
,Could you explain further please?
The Forum accepts a wide variety of formats.
e
Once i have chosen my image i then click on upload and it seems to do nothing and then i get a pop up that reads "upload of file failed"
8 pins, one for each column and one for each row. 4 columns, 4 rows. haven't wired to picaxe help needed on thatFurther to that, if the item is illustrated or for sale on line, you could post a link to the item.
I have used 16-key keypads that use a 1x16 (17 pins), 2x8 (10 pins) and 4x4 (8 pins) matrix. How have you wired it to your PICAXE?
If you want help, you need to be specific.
p
The image is a jpg but i'm on a MAC might have an affectSo what format is the image in.
http://emartee.com/product/42022/Mini 4x4 Matrix Keypad
Is a link to the a very similar keypad but mine is slightly older and i don't know where it is from but is the same style as this one
Is a link to the a very similar keypad but mine is slightly older and i don't know where it is from but is the same style as this one
westaust55
Moderator
@ REDEYE,8 pins, one for each column and one for each row. 4 columns, 4 rows. haven't wired to picaxe help needed on that
back at post 1 you indicated:
So what exactly have you done so far ??I have tried many different ideas but none so far successfully.
Also at post 1 you indicated:
Outputs of what?however the outputs need to be binary code to go down a DATA bus.
What data bus?
with respect to valid file types, when you enter the file manager, at the bottom of the window is a list of acceptable file types:
Valid file extensions: bas bmp cad doc dsn gif jpe jpeg jpg pdf plf png psd txt zip
Have a look at the wiring diagram from the link I gave back at post 2.http://emartee.com/product/42022/Mini 4x4 Matrix Keypad
Is a link to the a very similar keypad but mine is slightly older and i don't know where it is from but is the same style as this one
Do you have a multimeter (DMM) check the keypad wiring is the same. If not we need to know what format it is arranged in.
The keypad you gave a link to above has no "key" identifiers. What codes do you seek from this keypad of yours.
PLEASE provide more information so that other may help you better.
WESTAUST55
I will spend the rest of the day compiling the information and upload it tomorrow some time possible as a video explaining the whole project. It will take a lot of time to do this as this is just one small subsystem in a bigger project but to help people have a think before tomorrow it is a calculator for teaching small kids basic maths.
I will spend the rest of the day compiling the information and upload it tomorrow some time possible as a video explaining the whole project. It will take a lot of time to do this as this is just one small subsystem in a bigger project but to help people have a think before tomorrow it is a calculator for teaching small kids basic maths.