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.
We hand assemble each of Aware’s Geiger Bot Interfaces for our customers that desire such an interface.
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.
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:
an assembled Mic-Headphone for the iPhone – iPad:
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.
Download and Install Geiger Bot on your iOS device:
iTunes Geiger Bot
Select "Geiger Counter" "Custom GM Tube" "Conversion Factor" and enter the value below for Aware RM you are going to use:
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".
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.
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