Projects in progress

STM32

Pins

Undocumented

Little2wire

Cost: base £1.5 ($2.4); 3.3V £0.25 ($0.4); miniUSB £0.1 ($0.16) (+headers)

LPC810 / LPC812

LPC11U35

tinyUSBboard -> USBasp shield + PDI

An L-shaped board (so that it doesn’t obscure the buttons) with flat-mounted ISP connector, which would work also for PDI. This requires bit-banging PDI and see if we can get a clock wave from PB2/OC1B pin.

micromite

openocd

udev rules

ft232h

Parts

Memory lane list

Devices wishlist

Stores

RFM69

picaxe

PIC

Notes

SMT pad sizes

SMT pad sizes pic

7400 / 75HC parts

Level conversion

Old notes

avrdude/AVRISPmkII problems on OS X

Minimus

Oscilloscope

Generating sound

Teensy3

Leonardo as ISP

AVR programming

Debouncing

ATtiny45/85 breakouts

V-USB

Programming with an ISP

command-line avrdude usage

shell/basic on Arduino

XProtoLab / Mac GUI

Ciseco radios

XRF

URF

Thermistor LLAP notes

From the webpage

Q.I’ve set it into a sleep state but want to change the interval?

A. There are 3 ways,

1.  Plug the XRF into an FTDI board (or similar) short pins 19&20 at powerup. This will load  the default settings (you will probably want the change to be permanent, so issue (via AT commands) “ATWR” to write that config to flash). 

  1. Ground pin 6 - this will force the device to be awake, you can then issue commands to change to interval or other settings. Note that unless you tell the device to stay awake (axxWAKE—–) then it will resume sleep as soon as you remove the ground from pin 6.

3.  Issue an “axxWAKE—–” or “axxINTVL000x” command within 100ms of the device sending it’s battery reading (happens usually every 10th cyclic reading). There’s a 100ms window for recieving at that point. If you have no way of creating such a response we have seen customers take a brute force approach and send a “continuous stream” of commands till one is sent within that 100ms window. To send a continuous stream is easiest by using a micro, using XCM

My notes

Home automation

Tweet-a-Watt

atmega on a breadboard

zdroje / netzteil / netzgerät