https://www.photonicsguy.ca/ 2026-04-06T22:36:45+00:00 https://www.photonicsguy.ca/ https://www.photonicsguy.ca/_media/wiki/dokuwiki.svg text/html 2021-07-06T14:15:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/t530?rev=1625580959&do=diff Lenovo T530 Laptop WiFi upgrade I successfully installed an Intel Dual Band Wireless-AC 7260 wireless card by modifying the whitelist in the BIOS. I've compiled this step-by-step guide with references as I had trouble finding a similar resource online. Living in Toronto, the 2.4GHz WiFi band is over saturated and my best wireless throughput was roughly 16Mbps, now with 5GHz Wireless AC, I get an average of 700Mbps. I decided not to upgrade to the latest BIOS and to attempt the whitelist modifi… text/html 2017-11-12T18:33:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/archive/nslu2?rev=1510511638&do=diff Embedded Linux computer with 1-wire net Linksys NSLU2 running Debian Linux off of flash memory, polls a 1-wire net every 5 minutes and records the data (temperature and humidity) to a remote SQL server. 1-Wire PIC18 Microcontroller PIC18F4523 reading an ADT7410 temperature sensor via I2C. text/html 2017-11-12T18:38:16+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/archive/eeepc?rev=1510511896&do=diff Eee PC Customizations Some Eee PC customizations via shell script * Disable suspend to ram when AC adapter is plugged in and the lid is closed. * 30 minute timeout, after which the computer is suspended anyways * If the lid is closed and the AC adapter is unplugged, then suspend to ram is run. text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/arduino/lcd?rev=1415904614&do=diff LCD Display MJKDZ I2C board from eBay. Notes: * eBay search for board * * I2C address is actually 0x20, not 0x27 * I'm using the New LiquidCrystal library * Need pull-up resistors on SDA and SCL lines (A4 & A5 pins) Test Code #include <Wire.h> #include <LiquidCrystal_I2C.h> #define lcdAddr 0x20 // set the address of the I2C device the LCD is connected to // create an lcd instance with correct constructor for how the lcd is wired to the I2C chip LiquidCrystal_I2C lcd(lcdAddr, 4, … text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/vintage/next?rev=1415904614&do=diff NeXt Cube From <http://www.bangmoney.org/nextstep/root_password.html> Lost Root Password If you've forgotten the root password, you'll need to follow the following procedure to reset it so you can login as root. This is most helpful to people who've just purchased a used NeXT but don't know what the root password is. Reboot the system. Immdeiately after the "Testing System" message is replaced with "Loading from disk", hold down the right command key and press the tilde (~) on the numeric k… text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/bicycle?rev=1415904614&do=diff My Bicycle I bought the bike from George Vettor Cycle & Sport in Guelph. Plans * Design bracket for GPS logger and battery * Design LED lighting system * One idea is for a POV style digital readout for velocity, but I don't bike at night so much anymore... Lights text/html 2023-11-24T14:55:53+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/start?rev=1700837753&do=diff Welcome This site will always be a work in progress, Some pages describe projects I've done, working on, or want to do. Other pages are more for my own reference. Recently, I've repaired a broken Fluke 45 DMM, a Topward power supply, made some wireless sensors, and most recently upgraded the text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/405nmlaser?rev=1415904614&do=diff 405nm Laser Diode Blue, Violet, almost Ultraviolet really. I made a driver board and just need to finish the heatsink and mount it in a case. I bought a translucent blue project box from Hammond that I'll be mounting the laser in. * 405nm (Blue) Laser text/html 2016-12-11T20:47:18+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/chip?rev=1481489238&do=diff C.H.I.P Computer Headless Setup * Connect CHIP to your Linux computer via USB * Run minicom -D /dev/ttyACM0 to connect to CHIP via a serial console * Login to chip, username: root, password: chip * Run nmtui, a console based wireless configuration tool text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/flash?rev=1415904614&do=diff Camera Flash Control CableShoeFunction?VoltageWireShieldGGnd 0RedF1Fire1.66Vdc3WhiteF2flash ready signal / data2 Hz signal 1-5V (0V when charging)2BlackF3TTL OK signal / clock1.06V (0V when charging)1 Measurements Flash Duration0.1ms delay27 to 28ms text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/reference/flukemeter?rev=1415904614&do=diff Fluke 189/187/89-IV/87-IV Remote Interface Specification Archive of http://www.cfa.harvard.edu/~thunter/manuals/RemoteSpec89_18X.htm Retrieved October 2009 from Internet Archive, dated September 13th, 2006. Technical Note Fluke is providing this information to those few customers who would like this information. We give this information with the understanding that Fluke will not provide any additional support on this information. This means that our Product Support Service will not be able t… text/html 2018-03-04T14:54:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/photography/flash/wireless_trigger?rev=1520175268&do=diff Hotshoe on the Olympus M10 has a flash trigger of only 2ms. Wireless trigger doesn't respond reliably. Adding a 0.1uF(104) cap extends the pulse to approx. 7ms. <http://www.e-ele.net/DataSheet/HT75XX-1.pdf> Godox flash possibly contains CC2500 text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/dgpsbeaconrx?rev=1415904614&do=diff DGPS-11 Beacon Receiver Si-tex DGPS-11 Beacon Receiver module mounted in a weatherproof housing. Wire Function Red+3A fused 10.8 to 31.2VDC OrangeRS-232C In WhiteRS-232C Out Black- Negative BlueTTL Out GreenData Ground BrownShield GroundHow can I tell if my WAAS GPS is giving me a corrected fix? Look for a "D" in your Latitude/Longitude readout. text/html 2014-11-13T22:12:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/dualpressuresensor?rev=1415916744&do=diff Barometric Pressure sensor Dual pressure sensor board [PIC18F1320 Datasheet] RX on pin 3 TX on pin 2 Power ON 98.97 kPa, 742.3 Torr ; 0814,0521 98.97 kPa, 742.3 Torr ; 0814,0521 98.97 kPa, 742.3 Torr ; 0814,0521 Reference Barometer - MPXAZ4115A text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/gps?rev=1415904614&do=diff GPS Haicom HI-406BT 19200bps, 8N1 Serial Data PinWireDescription Blue3Vpk-pk serial data Orange3.3V Green3.3V Red0V Referenced to Ground Haicom website * [HI-406BT Manual] GPS Receiver Modules * Lowrance LGC-12S - [Owner's manual] * Earthmate Hyperformance GPS Receiver - Rockwell binary output only text/html 2016-03-09T02:48:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/mysensors?rev=1457491680&do=diff MySensor board After reading about the MySensors project, I decided to design a small circuit board to hold the Arduino and radio module. Status: * Nov 25th: I've assembled two working boards. Imgur photos * Nov 24th: I received the boards, Yay!! * Nov 7th, 2014: I'm waiting on the PCB's from text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/opticalmouse?rev=1415904614&do=diff Optical Mouse With this project I intend to use an optical mouse sensor chip for detecting movement on a translation stage. Interfacing the chip with a PIC microcontroller. The mouse shown contains the ADNS-2051 sensor. I removed the microcontroller and rewired the cord for power and the I2C bus. text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/serialconverter?rev=1415904614&do=diff Serial Converter MAX233CPP * Uses no external caps Cable Pinout Pin Wire Colour Description 1 N/C 2 Black RD (Data to PC) 3 Brown TD (Data from PC) 4 N/C 5 Red Ground 6 Orange DSR 7 Yellow RTS 8 Green CTS 9 N/C S Shield text/html 2016-03-09T00:46:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/sumppump?rev=1457484383&do=diff Sump pump Monitor My parents have a cistern and a sump pump which would be useful to have some sort of water level monitoring. In the past, we would check the cistern level with a pressure gauge calibrated in inches of water. There was a rubber squeeze bulb which which would pressurize a plastic line which fed into the cistern, and the resulting level would be shown on the gauge. text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/temperature?rev=1415904614&do=diff Temperature sensing devices ADT7410 Digital I2C Temperature Sensor ±0.5°C Accurate, 16-Bit Digital I2C Temperature Sensor PinWire Colour1SCLYellow2SDABlue3A0Gnd4A1Gnd5INTn/c6CTn/c8VddRed7GndBlack Need 0.1uF Cap between pins 7 & 8 From Analog Devices, [ADT7410 Datasheet] Thermopile sensor text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/usbserial?rev=1415904614&do=diff USB Serial Adapter FTDI FT232RL Digikey Part# 604-00043-ND Prolific USB Serial Adapter Drivers: <http://www.prolific.com.tw/eng/downloads.asp?ID=31>, [Local copy] 3.3V Logic WireFunctionYellowDCDBrownGroundOrangeRX (To ComputerPurpleRTSRedTX (From computer)BlueCTSGreenRI??GreyDTR Reference * [PL-2303 Datasheet] * [PL-2303 Product guide] text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/wirelessmodem?rev=1415904614&do=diff Wireless Data link * AC4490-1000M *