|Frequency Monitor – $128
A headband with an accelerometer that is sensitive enough to pick up the heartbeat and can thus easily detect rapid eye movements. A scholar edition will be made available for $77.
Resolution: 3660µg, measurement range: ±5g (49 m/s2)
Pre-order | LSDBase Entries | DIY
|Electroencephalograph – $256
A headband with an electroencephalograph based on the OpenEEG project. Detects REM sleep from the spikes in electrical activity caused by the eye muscles, but also records the unfiltered brainwaves.
Active electrodes: 4, passive electrodes: 1
Pre-order | LSDBase Entries | DIY (EEG SMT, 4 x AE, 1 x PE, 1 x USB)
To make one professionally, suit up and get two halo headbands (one white tie, one black pullover and some iron on tape so you can make a smugglers belt in the middle for the cables and sensors). You can usually get a better deal from eBay or Amazon. Any headband or a sock will do, albeit not as comfortably.