strange keypad reading

[Jordy101091]

Hi all,

I have some trouble with my keypad that I have bought from Conrad.nl.
This is the specific keypad: [urlhttp://www1.conrad.nl/scripts/wgate/zcop_nl3/~flNlc3Npb249UDkwX05MX0IyQzpDX0FHQVRFMTY6MDAwMS4wMGE2LmVkYmRmNDdlJn5odHRwX2NvbnRlbnRfY2hhcnNldD1pc28tODg1OS0xJn5TdGF0ZT00MjgxODQ4OTk3====?~template=PCAT_AREA_S_BROWSE&mfhelp=&p_selected_area=%24ROOT&p_selected_area_fh=&perform_special_action=&glb_user_js=Y&shop=NL2&vgl_artikel_in_index=&product_show_id=&p_page_to_display=DirektSearch&~cookies=1&zhmmh_lfo=&zhmmh_area_kz=&s_haupt_kategorie=&p_searchstring=matrix&p_searchstring_artnr=&p_searchstring_manufac_artnr=&p_search_category=alle&fh_directcall=&r3_matn=&insert_kz=&gvlon=&area_s_url=&brand=&amount=&new_item_quantity=&area_url=&direkt_aufriss_area=&p_countdown=&p_80=&p_80_category=&p_80_article=&p_next_template_after_login=&mindestbestellwert=&login=&password=&bpemail=&bpid=&url=&show_wk=&use_search=3&p_back_template=&template=&kat_save=&updatestr=&vgl_artikel_in_vgl=&titel=&darsteller=&regisseur=&anbieter=&genre=&fsk=&jahr=&jahr2=&dvd_error=X&dvd_empty_error=X&dvd_year_error=&call_dvd=&kna_news=&p_status_scenario=&documentselector=&aktiv=&gewinnspiel=&adcampaign=&gclid=&p_load_area=$ROOT&p_artikelbilder_mode=&p_sortopt=&page=&p_catalog_max_results=20][/url]

Datasheet: http://www.produktinfo.conrad.com/daten ... IX_3X4.pdf

First I have measured what the rows and collums are. this came out that the first 3 pins from the left are the collums and the rest rows. Then I have looked up the datasheet of the Matrix keypad eblock and hooked up with all the pull-downs and stuff. then In flowcode made a simple program to let me show what number I had pressed.

My problem(s) are:

1. When I press no key the display shows always 1 I dont know why but it does.
2. When I connect the ground to the 10k pull-down resistors the program does not respond to any keypad that is pressed, when I disconnect the ground the program responds but only to the first row its very strange, when I press 1,2 and 3 it correctly shows 1,2,3 but when I press 4,5 and 6 it shows only 1,2,3 what the f+*&^@ I dont understand.
3. When I hook up the keypad without any resistors and press any it corresponds with what is show'n on the display but for example when I press 7 it first shows 1, 4 and finnaly 7 and when I do not press any key ore even pull out my keypad it show randum numbers.

Hope anybody can help me with this problem,

Regards Jordy

[Jordy101091]

Sorry,

I have found my problem,
The problem was that my Pull-down resistors where to small,

If you dont have 100k resistors that you need to use with 10k

10k = collums
100k = rows if you dont have these you cant use 10k instead (stupid)

You then need to use:

1k for the collums and 10k for the rows.

Thanks Anyway

Regards Jordy