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Tire Pressure Sensor Code

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

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_…

SD GPS Track Logger

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

SD GPS Track Logger Why? This is why:Bicycling Trips ICSP Connector Need a PIC18 chip with more memory, I'm using the PIC18F4685 with 96Kbytes of program memory. Microchip Mass Storage Class Firmware [Still not working] Still not working. Might be software or hardware, I'll need to check it on a digital oscilloscope. Correct clock rate (less than 400KHz).

Magtek Card reader

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

Magtek Card reader MAGTEK 21045002 MagStripe card reader. [Datasheet] Single Track, only reads Track 2 2.7 to 5.5VDC When no card is present all pins are high. When a card is present pin 5 goes low and remains that way for 140ms after the entire card has been read.

DGPS-11 Beacon Receiver

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

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.

Tire Pressure Sensor

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

Tire Pressure Sensor The pressure is determined by the formula, 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

MySensor board

Anonymous (anonymous@undisclosed.example.com) — 2016-03-09T02:48:00+00:00

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

Panel Meter Interface

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

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

Serial Converter

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

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

Sump pump Monitor

Anonymous (anonymous@undisclosed.example.com) — 2016-03-09T00:46:23+00:00

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.

Barometric Pressure sensor

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T22:12:24+00:00

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

Temperature sensing devices

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

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

Touch Sensor

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

Touch Sensor Current Status: Prototype

X10 Interfacing

Anonymous (anonymous@undisclosed.example.com) — 2014-11-13T18:50:14+00:00

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.