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
scoace
Posts: 2
Joined: Sat Jan 23, 2016 6:50 am

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

Postby scoace » Tue Mar 14, 2017 7:56 am

Anyone a good schematic in pdf format for this board ?

zmemw16
Posts: 1067
Joined: Wed Jul 08, 2015 2:09 pm
Location: St Annes, Lancs,UK

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

Postby zmemw16 » Tue Mar 14, 2017 12:19 pm

https://s3-ap-southeast-1.amazonaws.com/a2.datacaciques.com/wm/307176851/3849027817/331363817.jpg

that's about as good as it gets, however most of it is boiler plate.
if you can find any one of PA4-PA7, that's SPI1 etc.
same sort of thing for the I2C & U[S]ART's etc
OLED might be a problem.

all a bit of match the blobs jigsaw :D

i just tried looking at it with GIMP, it is just about readable.

stephen

scoace
Posts: 2
Joined: Sat Jan 23, 2016 6:50 am

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

Postby scoace » Tue Mar 14, 2017 7:52 pm

Thanks Stephen, but that's exactly what i have found on the net. I would like to connect a NRF2401 and i can hardly read the pin#.

The NRF2401 Socket should be:

1 GND 2 VCC
3 PB0 CE 4 PB2 CSN
5 PA5 SCK 6 PA7 MOSI1
7 PA6 MISO1 8 PA15 IRQ

zmemw16
Posts: 1067
Joined: Wed Jul 08, 2015 2:09 pm
Location: St Annes, Lancs,UK

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

Postby zmemw16 » Wed Mar 15, 2017 2:51 pm

nrf24 8 pin signals

Code: Select all

1 GND
2 VCC
3 PB0 CE
4 PB2 CSN
5 PA5 SCK
6 PA7 MOSI1
7 PA6 MISO1
8 PA15 IRQ


& datasheet has PB as

Code: Select all

PB0
PB1
PB2 boot1 ***
PB3
PB4
PB5
PB6 i2c ***
PB7 i2c ***

so i'm not sure CE & CSN are on PB, i'm inclined to see those blobs as PC and a single digit.
i'd also have to suspect PB2 is incorrect, can't see them over-riding I2C1 either.
SPI1 and IRQ i agree with
using PC[0-7] 0-5 ADC 6-7 TIM3 would lose ADC's only, say PA4, PA5 ?
one of my boards has PA4 and PC4 for those 2 signals, PA4 is logical as its the default SPI1 cs line.
check which is really the nrf24 cs line, funny feeling it's CSN and CE is tx/rx mode switch

so it's waggling bits and observe using a led & resistor time :D
thought of building a Pig-O-Scope? then its waggle all at different rates etc etc
i've got OpenBench Logic Sniffer's for doing that.

stephen


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