https://www.photonicsguy.ca/ 2026-04-06T17:23:31+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/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 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 2017-03-20T21:45:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/3d/tiko?rev=1490046311&do=diff Tiko I was fortunate enough to receive my Tiko for Christmas from batch #1. Starting on Christmas day I printed a bunch of owls, a benchy, and some other ornaments as well as the Tiko demo print. Video of my first print Things I've designed * Thingiverse * Tiko build volume * Top hat (for a failed owl print) text/html 2023-12-20T15:30:29+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/esphome/watermeter?rev=1703086229&do=diff Water meter monitoring Hardware Using a ESP32 with QMC5883L compass module. TBD Accuracy Quite accurate, each interval (max to min to max) from the water meter appears to be 32.5ml, this was confirmed over the course of a few days and about 1.6 m³ of water (about 49 thousand intervals). text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/dvr?rev=1415904614&do=diff MythTV DVR System Upgrade Hardware * Intel Celeron Dual Core E1200 CPU Allendale * Intel Desktop Board DG35EC * Product Guide * Integrated graphics with DVI out - Not used * Four Sata connectors * Gigabit Ethernet * 2x1024MB PC5400 RAM * Masscool Socket 775 CPU Cooling Fan * Cooler Master computer case * Nvidia 7300GT PCIexpress video card 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 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/projects/electronics/panelmeter?rev=1415904614&do=diff Panel Meter Interface Components * Panel Meter * [MCP41050] * [LM321] * [MAX5487 Digital Pot] * [12-bit DAC with SPI Interface] 1mA Full scale meter 94 Ohms coil resistance 5K Ohm resistor @ 5V = 1mA MCP4821 Pin No.SymbolFunction1VddSupply (2.7 to 5.5V)2CSChip Select3SCKSerial Clock Input4SDISerial Data Input 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 2021-01-19T17:23:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/archive/cetus?rev=1611077023&do=diff Cetus Tracklog Cetus TrackLog (Linux) 1.35 Copyright (c) 2001-2004 Cetus http://www.CetusGPS.dk Usage: TrackLog [options] trackfile... <Enter> Options (* are default values): -fu user defined format * -dt TAB delimited * -fx GPs eXchange format (GPX) -ds semicolon delimited -fi Gliding Commission format (IGC) -dc comma delimited -fr NMEA RMC sentence format -dl linefeed delimited -pd decimal degrees * -sp period as decimal … 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/reference/apcups?rev=1415904614&do=diff APC Smart-UPS 2200 RM with AP9606 management card Upgraded to latest firmware by uploading aos325.bin and sumx326.bin via FTP. <ftp://ftp.apc.com/apc/public/hardware/webcard/firmware/sumx/v326/> APCUPSD crashing, aborted (core dumped) I used the following patch to fix apcupsd: <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=655741> ===== --- a/src/drivers/snmplite/apc-mib.cpp +++ b/src/drivers/snmplite/apc-mib.cpp @@ -307,6 +307,8 @@ break; case CI_Overload: + if (data… 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/projects/electronics/50a5vpowersupply?rev=1415904614&do=diff 50 Amp 5 Volt Power Supply Need a 208.76 ohm, 1% resistor to set the 5V output. Right now I'm using a 500 ohm potentiometer. 200 ohms would output 5.02V. text/html 2014-11-13T18:50:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.photonicsguy.ca/projects/electronics/ioboard?rev=1415904614&do=diff IO Board 16 Bit Digital input, 16 Bit Digital Output. Outputs 16 Relays Inputs [HP3700] 16 socketed Optoisolators, rated for 5 to 240 Volts, AC or DC. Pinout Relay boardSignal NamePin#PinSignal NameGndGround B1 #A1 -I/O CH CKI/O channel check; active low=parity error