swapping a display

[m3vuv]

hi all,i have a spot welder timer unit,see pic,it looks like an ic2 interface to me,can i swap it with this one? https://www.ebay.co.uk/itm/Arduino-Blue-LCD-2004-with-I2C-interface-only-requires-2-I-O-pins-UK-Seller/191961308435?hash=item2cb1c91d13:g:1xcAAOSwSzdXBEoA

[DrG]

Looks more like these, which are very common. Do you have exact measurements?

https://www.amazon.com/Pieces-Display-Module-SSD1306-3-3V-5V/dp/B08CDN5PSJ/ref=sr_1_4?dchild=1&keywords=OLED+Arduino&qid=1601822863&sr=8-4

Edit: If you mean can you replace it with the larger one that you linked to, then I would say, no, because it is a different controller and, while not impossible, you would need to modify the firmware.

[m3vuv]

it looks like 28mmx12mm

[DrG]

it looks like 28mmx12mm

https://www.amazon.com/dp/B07D9H83R4/ref=vp_d_ac_sub_sp_pd?_encoding=UTF8&pd_rd_i=B07D9H83R4&pd_rd_w=yU6p0&pf_rd_p=2ffcd48a-9fc6-4fa5-9277-084a00597c0f&pf_rd_r=108508b7-0a20-46b1-879f-3767397a7525&pd_rd_r=108508b7-0a20-46b1-879f-3767397a7525&pd_rd_wg=VhGCg

Gives measurements (converted to mm) 38.1 X 11.43 - BOARD size, not screen or viewing area.

But, again, are trying to simply replace the display with the same display or trying to use a bigger display or ?

[m3vuv]

thats the viewing area,i just want a biiger display so i can read it without glasses.

[madires]

hi all,i have a spot welder timer unit,see pic,it looks like an ic2 interface to me,can i swap it with this one? https://www.ebay.co.uk/itm/Arduino-Blue-LCD-2004-with-I2C-interface-only-requires-2-I-O-pins-UK-Seller/191961308435?hash=item2cb1c91d13:g:1xcAAOSwSzdXBEoA

The current display is a graphics OLED, possibly an SSD1306 based one. The one you've linked is an HD44780 based character display with a PCF8574 backpack for I2C. That would require a different firmware driver. There are slightly larger OLEDs sold as SSD1306 based, but some (most?) come with an SH1106 instead. The SH1106 is quite similar to the SSD1306, though it needs some tweaks.

[SiliconWizard]

Yes it looks like a graphics display.

Anyway, there are literally myriads of such displays on the market, with different characteristics and different controllers, so unless you're ready to re-write the code for the display, all bets are pretty much off unless you can find the exact same couple (display + controller). Even if it's the same controller but not the same display, it may not function as there can be a specific configuration (that again would require modifying the software.)