Hi,
I'm looking for some advise on powering an OLED display!
I have not ordered the display yet but after much searching I selected this (based on size, interface(I2C) and cable type/length)
ali-link (https://www.aliexpress.com/item/1000005361020.html?spm=a2g0o.detail.1000023.22.76ae6c78YN65tv)
The information on that page is limited but after some searching I found what I think is the correct(complete) technical drawing for the screen
I have visually identified the screen the screen as an GLO091-D-M2018 from the chart shown on this page, the data on this chart suggests that the display can be powered by 3.3~4.2V using the internal charge pump or with an external 9V source (for VCC)
https://www.alibaba.com/product-detail/0-91-Mono-128x32-SSD1306-OLED_60504702565.html
I would like if possible to use the internal charge pump, but don't really understand how, as with any other OLED to use the internal pump you need to add capacitors on C1/C2 lines and power to the VBAT line - these are not present on this connector.
I also found this page with a slightly different cable, the page has a suggested schematic that shows the screen being powered externally with 9V (the 9V is mentioned in the notes)
https://www.alibaba.com/product-detail/0-69-inch-0-69-OLED_60703608825.html
And then this - from someone having issues getting one to work (he never says if/how he fixed his issue but it may be related to the power or reset)
He seems to be just using 3.3V with VCC connected to ground via a cap (as in previous diagram - but no mention of suppling VCC)
https://github.com/olikraus/u8g2/issues/994
So how do I use the internal pump... Do I just connect VCC to ground or must I supply the 9V?
Also I if I have to or wanted to provide the 9V what would be the best (best = low price & PCB space) way to provide 9V for this? (I have 3.3V & 5V available, and mains power so efficiency is not much of an issue).
Thanks All.
I'm looking for some advise on powering an OLED display!
I have not ordered the display yet but after much searching I selected this (based on size, interface(I2C) and cable type/length)
ali-link (https://www.aliexpress.com/item/1000005361020.html?spm=a2g0o.detail.1000023.22.76ae6c78YN65tv)
The information on that page is limited but after some searching I found what I think is the correct(complete) technical drawing for the screen
I have visually identified the screen the screen as an GLO091-D-M2018 from the chart shown on this page, the data on this chart suggests that the display can be powered by 3.3~4.2V using the internal charge pump or with an external 9V source (for VCC)
https://www.alibaba.com/product-detail/0-91-Mono-128x32-SSD1306-OLED_60504702565.html
I would like if possible to use the internal charge pump, but don't really understand how, as with any other OLED to use the internal pump you need to add capacitors on C1/C2 lines and power to the VBAT line - these are not present on this connector.
I also found this page with a slightly different cable, the page has a suggested schematic that shows the screen being powered externally with 9V (the 9V is mentioned in the notes)
https://www.alibaba.com/product-detail/0-69-inch-0-69-OLED_60703608825.html
And then this - from someone having issues getting one to work (he never says if/how he fixed his issue but it may be related to the power or reset)
He seems to be just using 3.3V with VCC connected to ground via a cap (as in previous diagram - but no mention of suppling VCC)
https://github.com/olikraus/u8g2/issues/994
So how do I use the internal pump... Do I just connect VCC to ground or must I supply the 9V?
Also I if I have to or wanted to provide the 9V what would be the best (best = low price & PCB space) way to provide 9V for this? (I have 3.3V & 5V available, and mains power so efficiency is not much of an issue).
Thanks All.