Differences

This shows you the differences between two versions of the page.

--- playground:playground [2018/07/06 09:53] – external edit 127.0.0.1
+++ playground:playground [2019/04/03 19:54] – Jim
@@ Line 1: / Line 1: @@
-====== PlayGround ======
+~~NOTOC~~
+====== Scottish Consulate Badge ======
+====Concept====
+An electronic badge for ScotCon members and visitors. Low cost, straightforward self-assembly, unicorn or pusheenicorn shape, LCD, neopixels, multimeter, IO ports
+====PCB====
+Max 100x100m 2 layer 1.6mm FR4 material, 1oz copper, 0.3mm min hole, 0.4mm solder mask dam, 0.42mm min track, HASL finish, blue finish/white silkscreen for minimum manufacturing cost from Seeed Studio
+Form factor: Unicorn, Pusheenicorn or Saltire, must be easy to mill, no complex shapes/sharp corners to minimise cost
+====Processor====
+ARM Cortex M4 STM32F303K8 Nucleo board (64K Flash), development environment ARM MDK V5 (free version, 32K code limit), OpenSTM 32 also possible, no code size limit but less stable
+====User Interface====
+Nokia 5110 LCD, 500uA @3V 6mA @5V (can reduce backlight LED current via resistor)
+Neopixels on tail/mane
+Buttons and/or joystick/rotary encoder
+====Multimeter====
+-50V DC/AC, continuity, diode test
+====Communication====
+UART/serial port - serial terminal or packet radio monitor connected to TNC?
+Shitty Add-On (I2C) connector
+Wireless - NRF42L01 module (cheap clones on eBay) - interact with other badges; 433 MHz packet radio receiver - pager receiver or LED control?
+====Power====
+V battery: LiPo, 2xAA or coil cell? Or 1x AA and boost converter? USB charging?