ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Generic boards that are not Maple or Maple mini clones, and don't contain the additional USB reset hardware
zmemw16
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ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by zmemw16 » Wed Nov 30, 2016 4:27 am

for eeprom, spi flash, battery and tf sd socket @ £4.86
headers for oled, nrf24, esp8266 and bluetooth, uart and swd to 2x4 header

http://www.ebay.co.uk/itm/191974161480? ... EBIDX%3AIT

a rather neat small board

stephen

michael_l
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by michael_l » Wed Nov 30, 2016 5:44 am

I like this board.

Looking at BP board it seems there just be enough space for one WB SPI Flash chip on bottom side :)

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RogerClark
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by RogerClark » Wed Nov 30, 2016 8:26 am

Looks like it should work OK.

USB seems to be connected and there is a 1.5k USB pullup (which is correct)

zmemw16
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by zmemw16 » Wed Nov 30, 2016 2:35 pm

i tried to post top and bottom pictures with my phone, wherever it saved them is up in the clouds :D

i also included an AAA battery for sizing, short side is 1 AAA in length, long side ~1.5??

sot pads for 24c02 and flash are marked as such, also more pads ( identified by D/R/C) for the support components, so i expect
some work in finding appropriate values, but straightforward work.

seems to have button on PA8, LED on PA1 ?? ??
headers,
2 off 2x20, [A0-A15, C14, C15, 3v3, GND] [ B0-B15, C13, 3v3, 5v, GND]
1 off 4x2 [GND, SWD, SWCK, 3V3] & [TXD, RXD, 5V, GND]
1 OFF 4X1 [3V3, GND, RX, TX]

pth for 5v & GND, regulator is an AMS117 type

if there are any conflicts is unknown, but someone put in time and effort. i wonder if i can find a schematic ... ... ...
nrf24 and esp8266 at the same time ??

stephen

if you order 2, you save £1 on the price of 2 times 1 off. i did again

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ahull
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by ahull » Wed Nov 30, 2016 4:03 pm

If you are planing on putting something on the 24c02 pads, consider using an AT24C256 or similar as it will fit on the same footprint and gives you 23k x 8bits (32kB) rather than the paltry 256 bytes of the 24c02. One off, the cost difference is not particularly significant.
- Andy Hull -

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martinayotte
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by martinayotte » Wed Nov 30, 2016 4:06 pm

Of course !
Even if 24C02 was already soldered, I would rather unsolder it and resolder a bigger one. :P

michael_l
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by michael_l » Wed Nov 30, 2016 6:02 pm

zmemw16: more pics requested :) ebay pic is a bit blurry

zmemw16
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by zmemw16 » Wed Nov 30, 2016 9:19 pm

used phone, looked at dates 22-01-2005 bleep bleep
did it again & zoomed icon view

ok it saved them in 2005 - why oh why

dimensions - more like 1 x 1.25 AAA

took top and bottom, opened in gimp, did a really zealous crop, saved as xcf and exported as jpg (250k/500k)
redid as png - nope way too big
changed to greyscale
judges marks for readability please, n.b. tft-oled not labeled with pins
neat-tidy-top.jpg
neat-tidy-top.jpg (87.26 KiB) Viewed 1361 times
neat-tidy-bot.jpg
neat-tidy-bot.jpg (94.88 KiB) Viewed 1361 times
NOTE i only soldered a few pins, just enough to ensure connector base flat to pcb.

question - guestimate smt size 1206, 0806 ??
question - can i use those soic8/sop8 pads as either soic or sop?
Microchip DS00049BN @2013 p137 on; appears to be that the suggested land layout would take either.
careful positioning is assumed :)

would there be a use for nrf24 and esp8266 at same time, i suppose data nodes, nrf24 and master with both, single wi-fi connection

stephen

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martinayotte
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by martinayotte » Wed Nov 30, 2016 9:45 pm

- smt size look more 0806 (or even 0604), maybe both would fit, but forget 1208, they are much to big.
- soic8 and sop8 are synonym. Flash there soic8W (wide 208mil version)
- don't use 24C02, place a 24C32 or higher such 24C512, they are pin compatible. (64KB vs 256 bytes)

chopc
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Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

Post by chopc » Wed Nov 30, 2016 10:23 pm

Seems as if this thread is heading into the realms of vapourware as when I try to buy anything from the seller it's "not accepting bids"

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