Using Aware Electronics Radiation Monitors with iPhone, iPod Touch, iPad or PC Sound Card


New Device Available: Aware's Geiger Bot Interface


Please note: Geiger Bot documentation appears to indicate a maximum count rate of perhaps 30 to 50 CPS unless the user fiddles with the settings. (The documentation states this: "Default Settings Max Rate: 3000 CPM (i.e. 50 CPS)" and "If you want a higher max count rate and Ultrafast Rates doesn't work for you -- and it probably won't -- see the manual settings section above"). Also the phone's battery usage, running GeigerBot, is a concern. In contrast, Aware's LCD-90 and USB-MSP can count rates greater than 12 million CPS limited only by the tube and in the case of the LCD-90, battery life is very long. Nothing beats the versatility, accuracy and flexibility of the LCD-90, the USB-MSP and Aw-Radw software, but if you own an iOS device and an Aware RM, the following might be a handy additional interface.
Geiger Bot is a free iOS app that, when used in conjunction with a Geiger Counter, displays, records and maps radiation levels.

Read more about Geiger Bot and how to download it to your iOS device here: Geiger Bot

For interfacing one or more of Aware Electronics RM-60, RM-70, RM-80, RM-G90 or Aware's Coincidence Box, to an iOS device (iPhone – iPod – iPad), Aware Electronics now provides our "Geiger Bot Interface". We use a 2 cell AAA battery pack with On-Off switch.

Also included is a built-in circuit to convert the RM’s detection pulses to a level suitable for a microphone input, a built-in cord to plug into the RM and a cord to plug into the iPhone’s MIC jack.

We also include a strip of Scotch Ultra Thin Reclosable Fastener to mount the Geiger Bot Interface to the side of the RM.

Since Aware’s RMs draw ~80 microamps at background radiation levels, the batteries should last ~ 15,625 hrs. or 260 days with continues operation. With actual use, one would turn on the RM only when measuring radiation levels with the iOS device.


RM-60, Geiger Bot Interface - iPhone

RM-60, Geiger Bot Interface – iPhone


RM-60, Geiger Bot Interface - iPhone in Clam Shell and a nearby source

RM-60, Geiger Bot Interface – iPhone with Clam Shell and Source


Hand holding an RM-60 with Geiger Bot Interface and an iPhone in a Clam Shell

Hand holding an RM-60 with Geiger Bot Interface and an iPhone in a Clam Shell


To use one of Aware’s radiation monitors with Geiger Bot, either purchase an assembled "Geiger Bot Interface" from Aware or assemble the interface yourself.

We hand assemble each of Aware’s Geiger Bot Interfaces for our customers that desire such an interface.



To Order: "Geiger Bot Interface: $49.95"


To use your iOS device to monitor MUONs from Cosmic Rays, plug two of Aware's RMs into an Aware C-BOX (Coincidence Box Decoder). Click here for info. about Aware's C-BOX. Plug the C-BOX output into the Geiger Bot Interface, and the Geiger Bot Interface audio-out plug into the iOS device.

To plug more than one RM into the Geiger Bot Interface, use a Telephone Line Splitter. Plug one or more RMs into the telephone line splitter and the outlet of the telephone line splitter into the Geiger Bot Interface.
RJ-11 5-way Splitter


To assemble the interface yourself, here is Aware’s recommended circuit:

Geiger Bot Interface

You need a 2 cell AAA battery holder with On-Off switch: 2 cell AAA battery holder with On-Off switch

One 56K ohm resistor: 56K ohm resistor

One 1K ohm resistor: 1K ohm resistor

A four wire, standard telephone cable with RJ-11 plug: Telephone Cable

A 3.5mm, 4 conductor TRRS plug for the iPhone – iPad microphone-headphone jack:
TRRS Plug
or
TRRS Plug
or
an assembled Mic-Headphone for the iPhone – iPad:
Mic-Headphone
in which case you will cut the plug and cable from the mic and headphones, strip the cable cover and cable leads and connect to your interface.


To setup the Geiger Bot application:

Download and Install Geiger Bot on your iOS device:
Geiger Bot

iTunes Geiger Bot


Launch Geiger Bot. Click the small gear icon to open the settings menu.

Select "Geiger Counter" "Custom GM Tube" "Conversion Factor" and enter the value below for Aware RM you are going to use:

RM-60: 17.5
RM-70: 24.8
RM-80: 59.1
RM-G90: 160.0

Select "Geiger Counter" "Custom GM Tube" "Offset" and enter 0 (zero)

Select "Geiger Counter" "Custom GM Tube" "I/O Settings" and turn off "Auto Adjust".

Also:

Set "RMS Window" to 1

Set "Delay Window" to 30

Set "Volume Threshold" to 10000 (Set this such that no counts are missed and noise is not counted).

Set "Ultrafast Rates" to ON

Return to "Settings" page and click "Done"

For screen shots of the menus, see: Geiger Bot Menus

Note, internally the iPhone MIC input includes a bidirectional transient-voltage-suppression diode, an inductor and capacitor coupling.


To use Aware’s Geiger Bot Interface with a PC’s soundcard, one needs to convert the the iOS’s TRRS plug to a standard 3.5mm Mic plug:

3-5mm-TRRS-Jack-to-Dual-3-5mm-Stereo-Plug

3-5mm-TRRS-Jack-to-Dual-3-5mm-Stereo-Plug

3-5mm-TRRS-Jack-to-Dual-3-5mm-Stereo-Plug


As mentioned above, please note nothing beats the versatility, accuracy and flexibility of the LCD-90, the USB-MSP and Aw-Radw software, but if you own an iOS device and an Aware RM, this is a handy interface.


E-mail aware@aw-el.com
Phone:(800)729-5397 or Phone/Fax: (302)655-3800

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