https://www.photonicsguy.ca/ 2026-04-06T20:42:41+00:00 https://www.photonicsguy.ca/ https://www.photonicsguy.ca/_media/wiki/dokuwiki.svg text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/tirepressuresensor/code?rev=1415904614&do=diff Tire Pressure Sensor Code Return to Tire Pressure Sensor Project. ;############################################################################### ;# TITLE "Pressure Sense" ;# ;# Program : Pressure sensor using an MPX5700DP sensor and LCD display ;# Version :1.0 ;# Revision Date : ;# Author : Jeff Brown ;# ;# ;# ;############################################################################### ; radix hex #define RA0_… text/html 2024-02-12T12:09:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/wiki/syntax?rev=1707739749&do=diff Formatting Syntax DokuWiki supports some simple markup language, which tries to make the datafiles to be as readable as possible. This page contains all possible syntax you may use when editing the pages. Simply have a look at the source of this page by pressing text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/electronics/voip/dvg-1120?rev=1415904614&do=diff DVG-1120 9600 Baud, 8N1 Serial Port Pinout RJ9ColourFunctionPin1BlkGround2RedRX (Data to Computer)3Grn4Yel?ColourFunction-BlkRedTX (from computer)GrnRX (To Computer)YelGround Commands CommandFunctionspy 16 *Show Debug info for SIPnwdbg bridge off text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/tirepressuresensor?rev=1415904614&do=diff Tire Pressure Sensor The pressure is determined by the formula, <m>P=0.145* Parts Part# Description Source Cost MPX5700DP-ND0-101.5PSI Pressure sensorDigikey$16 2 Ft 1/4ID hoseHome Hardware$1.50 2 crimp style hose clampsHome Hardware$1.60 text/html 2014-11-13T22:37:16+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/7segdisplay?rev=1415918236&do=diff 7-segment display module [Working Display] Arduino library available on Github This was one of my first doublesided and surfacemount boards. I made this board using Eagle for layout and then I used BatchPCB to manufacture the board. The board operates correctly, however, if I were to revise it, I would use a larger SMT resistor than the 0402 size. The board will be controlled via I2C from a PIC microcontroller, initially for the pressure sensor and later for other projects. 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 2014-11-17T21:33:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/arduino?rev=1416259994&do=diff Arduino Projects * LCD Display * Code Libraries * - SAA1064 7 Segment display text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/htaguide?rev=1415904614&do=diff My quick guide to the Ontario HTA for Bicyclists and Drivers Ontario Highway Traffic Act “highway” includes a common and public highway, street, avenue, parkway, driveway, square, place, bridge, viaduct or trestle, any part of which is intended for or used by the general public for the passage of vehicles and includes the area between the lateral property lines thereof; text/html 2017-01-09T21:38:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects?rev=1483997895&do=diff Projects THIS PAGE IS NOT ORGANIZED Electronics * 7-segment display Pressure Sensing * Tire pressure sensor * Sump pump level Temperature * Thermocouple GPS * Track Logging Other ---------- ~~PAGEINDEX=:projects:electronics~~ ---------- Physics experiments I'd like to try Mercury and Aluminum text/html 2016-03-09T00:46:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/sidebar?rev=1457484412&do=diff * Home * Contact * Education * Projects * Electronics * MySensor board * Sump pump Monitor * Barometric Pressure sensor * Tire Pressure Sensor * 7-segment display module * CadSoft EAGLE Libraries * Other * Transmission Holograms * Ferrofluid * Gel Candles * Arduino Projects * MySensor board * 7-segment display module * LCD Display * Vintage equipment * NeXT Computer * Olivetti P602 Delay Line Memory * Core Memory * Gad… 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 2021-07-06T13:33:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/eagle?rev=1625578394&do=diff CadSoft EAGLE Libraries <https://github.com/Photonicsguy/Eagle> eBay parts Footprints for components I've bought from eBay * eBay search for Arduino pro mini * eBay search for nrf24l01+ module Arduini mini pro NRF24L01+ module I've included a keepout block to prevent ground planes or traces from being routed under the antenna. I'm using this module for 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 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/ebay/voltammeter?rev=1415904614&do=diff Volt/Ammeter from eBay Search string: DC 4.5-30V 0-10A LED Digital Volt meter Ammeter Specifications: * Supply voltage: 4.5 30V (wide range) * Test voltage: 0 ~ 100V * The minimum resolution below 10V: 0.01V * The minimum resolution above 10V: 0.1V text/html 2017-06-04T17:02:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/electronics/vfd?rev=1496595754&do=diff VFD Display board HP Laserjet control demo [M66004 Datasheet] text/html 2017-11-13T00:04:38+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/inventory/display?rev=1510531478&do=diff Display 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 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/laserspeckle?rev=1415904614&do=diff Laser speckle display Using a glass tube to suspend a skittle or piece of plastic and illuminating it with a laser to demonstrate speckle. 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 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/optrexdisplay?rev=1415904614&do=diff Optrex IM50240 Display Hitachi HD44100H Chipset PinFunctionNotes1DL12CL13CL24M500KHz @ 50% duty cycle5n/c6VCC7IC GND & VEE8“Clear” Button9“Secure” Button10Ground text/html 2014-11-13T22:06:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/picgps?rev=1415916371&do=diff PicGPS Display One of my first PCB boards text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/x10?rev=1415904614&do=diff X10 Interfacing X10 Mini Timer power supply The LCD display seems to die after a few years (on three units I've used) so I figured out the pinout. 4N35's are used internally for opto-isolation, The power is from a transformer internally, with a rectifier and a capacitor. text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/work/coop/ideas?rev=1415904614&do=diff Ideas * Dragon Optical illusion using the cutter, marker, and welder. <http://www.grand-illusions.com/opticalillusions/dragon_illusion/> * Red, Green, and Blue laser diodes for a light show. * Emco mini lathe to make replacement tips for the laser cutter * Laser speckle display * Wiki for SOP's, change limited to faculty. ---------- text/html 2016-03-09T03:23:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/3d/openscad/start?rev=1457493795&do=diff OpenSCAD Endcap Endcap for a clear plexiglass tube to hold an LCD display module <HTML><BR CLEAR=“ALL” /></HTML> Drive Pulley Pulley for a drive belt for a Kodak Slide projector <HTML><BR CLEAR=“ALL” /></HTML>