IOShield Detector

From SPCoast

[edit] Introduction

Now that I am playing with Arduino based control points, it makes sense to use occupancy detectors that can be connected directly to IOShields.

The schematics and PCB layouts shown here were created using the free tools provided by Eagle CAD. I get the boards fabricated at Seeed Studios.

[edit] Features

• Connects to IOShield
• 4 supports remote detectors, either IR or Current based

[edit] Hardware

Board	Files
Main Board v1.0 Detector main board Eagle schematic and board layout v1.0 Detector main board gerber files
Remote Detector - Current sensing with pulse transformer v1.0 Coil-based detector remote board Eagle schematic and board layout v1.0 Coil-based detector remote board gerber files
Remote Detector - IR sensing with coded waveform v1.0 IR detector remote board Eagle schematic and board layout v1.0 IR detector remote board gerber files

[edit] Specification

This version is based on Rob Paisley's 555-based detector, which is simpler than Chubb's DCCOD, but lacks the easy sensitivity adjustment that Chubb's design provides.

[edit] Communication Protocol

Uses one nibble (4 bits) of an 8-bit IOShield port:

Bit 1 : Block 1 detection
Bit 2 : Block 2 detection
Bit 3 : Block 3 detection
Bit 4 : Block 4 detection

[edit] Programming

See IOShield_Code

[edit] Hardware

[edit] Bill of Materials (BOM) /parts list

[edit] Main Board

Part	Value	Package
C1	47uF	Electrolytic
C2	0.1uF	Ceramic
IC1,2	NE556	DIL14
J1-5	RJ11-6XRA	RJ11-NO_SHIELD
LED1-4	Yellow	CHIPLED_0805
R1-4	1K0	0805
RN1	1M0	SIL5

[edit] Current sense Remote

Part	Value	Package
C1	2.2uf	CAP-PTH-5MM
D1	BAV199	SOT23
J1	RJ11-6XRA	RJ11-NO_SHIELD
Q1	PMBT2222	SOT23
R1	10K	AXIAL-0.3
TR1	CoilCraft	TH-T4

[edit] IR Remote

Part	Value	Package
C2	0.001uf	CAP-PTH-5MM
C4	4.7uF	E5-6
C5	4.7uF	E5-6
C6	4.7uF	E5-6
D1	BAV199	SOT23
D2	BAV199	SOT23
IC1	LM556D	SO14
IC2	LM393D	SO08
J1	RJ11-6XRA	RJ11-NO_SHIELD
JP2	SCREWTERMINAL-3
JP3	SCREWTERMINAL-3
LED2	green	CHIPLED_0805
R1	2K2	R0805W
R2	22k95	0204/5
R3	1k0	R0805W
R4	100k	R0805W
R5	470k	R0805W
R6	4.7k	R0805W
R7	10k	R0805W
R8	1k0	R0805W
R9	10k	R0805W
R10	2k2	R0805W

[edit] Version Tracker

Revision	Descriptions	Release
v1.0	Initial prototype, based on my previous PIC-based Detector
v1.0 Remote Current Sense	Same as the remote used for Detector
v1.0 Remote IR	Waiting for sample PCB order

[edit] Licensing

• This documentation can be reused under the terms set by the Creative Commons Attribution-ShareAlike License 3.0
• Source code and libraries are licensed under LGPL, see source code files for details.
• The Eagle CAD files are licensed under the Creative Commons Attribution NonCommercial-ShareAlike 3.0 Unported License

Please contact John.Plocher via gmail if you would like to use these items in a commercial setting.