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Re: Display driver board reality
Not quite that simple¡­ Some, but few zeners operate at 10 MHz like the SPI clock and data signal lines do. What you get instead is something that looks like a mountain shaped waveform. People have
By K9HZ · #32621 ·
Re: Display driver board reality
*** To make protection complete, use a 3.3V zener and a fuse. Goof up, the fuse blows, you fix the problem and replace the fuse. Might want to use a zener slightly higher V, so it doesn't interfere
By jerry-KF6VB · #32620 ·
Re: Teensy 4.1 NE vs Ethernet
Yes the ethernet version will work. This is the version that I am using because I wanted ethernet on my T41-EP. John, G0SDF
By John G0SDF · #32619 ·
Teensy 4.1 NE vs Ethernet
Seems T 4.1 NE are now not in stock at PJRC.? Can anyone confirm, will the T4.1 with ethernet version work?? It has an additional ethernet chip on board.? A plug and cable can be added, but I would
By bruce williams · #32618 ·
Re: Projects Power Supply STL files
Very nice, Kevin! Russ
By rebruhnke@... · #32617 ·
Re: Display driver board reality
Just a thought but I am no EE.? I like the guidance and list.? The only remaining issue is *or if you DO have the level change hardware on your display board but have not selected it* Is it not
By bruce williams · #32616 ·
Re: [AmateurRadioBuilders] Display Adapter
No. data line voltages at 3.3 and VSS to the display requlator of 5V... Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC
By K9HZ · #32615 ·
Re: Display driver kits shortly
Well let¡¯s check that out. 1. I bought 10,000 2x5 PCB sockets from LCSC. Cost plus shipping, tax, etc left them at $0.26 each. That¡¯s less than half of Mouser or Digikey (they are way over priced
By K9HZ · #32614 ·
Re: Display driver kits shortly
Bill and all I'm surprised more people are not using LCSC for components, they are the sister to JLCPCB. Prices are mostly far better than Digi or Mouser, it just takes a little longer for deliveries.
Re: [AmateurRadioBuilders] Display Adapter
By "operating the display at 5V", you mean 5V logic? - Jerry, KF6VB
By jerry-KF6VB · #32612 ·
Display Adapter
This one will work for operating the display at 3.3V and 5V. It's about $0.60 more that the strictly 3.3V driver board. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
By K9HZ · #32611 ·
Re: Display driver kits shortly
Suggestion: instead of placing a female connector on the board, use a male connector, and then use a short female to female IDC cable to attach.
By ken WA2MZE · #32610 ·
Re: Display driver board reality
Yep that¡¯s what I found¡­ Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator Villa
By K9HZ · #32609 ·
Re: Display driver board reality
I have a number of these displays (both 5" and 7").? All can either run on 3.3 or 5V with jumper change (they all have a 3.3V regulator for 5V operation).? All are only 3.3V on the data lines, no
By Terrance Robertson, KN6ZDE · #32608 ·
Re: Display driver board reality
My understanding is the the 5" board is 3v3 - period. The 5V option just sticks a 3-terminal regulator on the board to make 5V supply into 3v3 for the internals. I used the 5V option because I figured
By jerry-KF6VB · #32607 ·
Display driver board reality
Oh brother, this is starting to get complicated. The RA8875 is a 3.3V chip. and the inputs, as far as I can tell. from my research so far. are only 3.3V tolerant. To make this more confusing, some of
By K9HZ · #32606 ·
Re: Display driver kits shortly
Those are 2mm, not 2.54mm.? ( I suspect you can find the .1" pitch there as well) Yahoo Mail - Email Simplified On Thu, Feb 6, 2025 at 12:16 PM, dick faust via
By Tom Clifton · #32605 ·
Re: Display driver kits shortly
Well fact is¡­ I¡¯ve already done that¡­ sort of¡­. For my prototype, I installed a 2x4 socket in a 2x5 holes pattern on the PCB knowing full well that 2 of the 10 holes on the end of the 2x5
By K9HZ · #32604 ·
Re: Display driver kits shortly
If you do not mind AliExpress there are many choices.? Link to 1 below:
By dick faust · #32603 ·
Re: Display driver kits shortly
Or depending on layout can you use the 2x6 and just snip 2 pins.? Is there real estate on the board for that?
By bruce williams · #32602 ·