2 months ago

171

Part 1 of the µTimer project, a versatile benchtop lab timer.
Choosing the LCD, and getting two sample LCD's running. One using a demo board, and one that needed to be hacked onto a Raspberry Pi.

Forum: https://www.eevblog.com/forum/blog/eevblog-1699-utimer-project/

00:00 - Benchtop Lab Timer Project
01:19 - It's all about the choice of LCD
03:14 - ERC19624-1 192x64 Transflective 4" LCD
03:44 - Reflective vs Transflective LCD's
05:01 - ER3806 Font Chip
06:06 - Demo Board
09:10 - LCD Bias Angle and Viewing Angle Explained
11:45 - What is THAT? LCD Bleeding?
13:19 - Power consumption measurement
15:48 - Trying another LCD, the ERC19624-6. What difference does a dash number make?
17:15 - Bodging on the LCD connector to the breakout board
20:34 - The pin offsets and lack of routing is annoying...
22:10 - Reprogramming the 8051 demo board, it should be easy, right?
26:32 - Entering The Matrix
29:40 - More soldering
30:33 - The Programmer Software doesn't work without a HEX file...
32:17 - All of that for nothing...
33:40 - Let's try this Arduino / Raspberry Pi ST7525 LCD code
35:36 - Getting the Raspberry Pi running and installing the BCM2835 C library
38:56 - Getting the Make to work on the source code.
40:01 - Make Clean should work...
41:16 - Winner Winner Chicken Dinner
41:10 - Power consumption measurement. This one is supposed to be much lower...
42:58 - Changing the LCD contrast in software
45:10 - Is it better or worse than the first LCD?
46:37 - Conclusion