[{"data":1,"prerenderedAt":496},["ShallowReactive",2],{"page-\u002Fdocs\u002Fparts":3,"list-docs":386},{"id":4,"title":5,"body":6,"description":371,"extension":372,"file":373,"group":374,"label":375,"meta":376,"minutes":368,"navigation":377,"order":378,"path":379,"section":380,"seo":381,"slug":382,"stem":383,"updated":384,"__hash__":385},"pages\u002Fhardware\u002FBOM.md","Bill of materials",{"type":7,"value":8,"toc":363},"minimark",[9,14,74,78,306,310],[10,11,13],"h2",{"id":12},"on-hand","On hand",[15,16,17,33],"table",{},[18,19,20],"thead",{},[21,22,23,27,30],"tr",{},[24,25,26],"th",{},"Qty",[24,28,29],{},"Part",[24,31,32],{},"Notes",[34,35,36,53,63],"tbody",{},[21,37,38,42,45],{},[39,40,41],"td",{},"1",[39,43,44],{},"ESP32-S3-DevKitC-1 (N8R8 or N16R8)",[39,46,47,48,52],{},"Controller, Bluetooth LE to the web app. A classic ESP32 DevKitC also works (env ",[49,50,51],"code",{},"esp32dev",")",[21,54,55,57,60],{},[39,56,41],{},[39,58,59],{},"AD5328 module V1.2",[39,61,62],{},"8 × 12-bit DAC, ±10 V outputs, 5 V supply (≤ 5.5 V), 3.3 V logic; reference jumper on 1-2",[21,64,65,68,71],{},[39,66,67],{},"8",[39,69,70],{},"Levitation coil 19 × 12 mm",[39,72,73],{},"495 turns, 4.2 Ω, 4.1 mH, ferrite core with M3 thread",[10,75,77],{"id":76},"to-buy","To buy",[15,79,80,94],{},[18,81,82],{},[21,83,84,86,88,91],{},[24,85,26],{},[24,87,29],{},[24,89,90],{},"Example \u002F spec",[24,92,93],{},"Why",[34,95,96,114,127,140,152,168,181,193,206,219,232,244,257,269,282,294],{},[21,97,98,101,104,107],{},[39,99,100],{},"8 (+4 spare)",[39,102,103],{},"Resistor 2.2 kΩ, 1 %, ¼ W metal film",[39,105,106],{},"–",[39,108,109,113],{},[110,111,112],"strong",{},"Mandatory"," current limit per coil (4.54 mA max)",[21,115,116,119,122,124],{},[39,117,118],{},"a few",[39,120,121],{},"Resistors 4.7 kΩ and 1 kΩ",[39,123,106],{},[39,125,126],{},"Lower\u002Fhigher ceiling if your calibration calls for it",[21,128,129,131,134,137],{},[39,130,41],{},[39,132,133],{},"PhotoMOS relay AQY212EH (or AQY212GH, G3VM-61A1)",[39,135,136],{},"60 V, 500 mA, bidirectional",[39,138,139],{},"Arming switch in the common coil return (silent)",[21,141,142,144,147,149],{},[39,143,41],{},[39,145,146],{},"Resistors 330 Ω + 10 kΩ",[39,148,106],{},[39,150,151],{},"PhotoMOS LED series resistor + pull-down",[21,153,154,156,163,165],{},[39,155],{},[39,157,158,162],{},[159,160,161],"em",{},"alt."," 1-channel 5 V relay module, active-high, with input pull-down",[39,164,106],{},[39,166,167],{},"Instead of the PhotoMOS",[21,169,170,172,175,178],{},[39,171,41],{},[39,173,174],{},"Momentary push button, normally open",[39,176,177],{},"Panel or hand-held",[39,179,180],{},"Hardware STOP",[21,182,183,185,188,190],{},[39,184,41],{},[39,186,187],{},"Perfboard + pin headers + Dupont wires",[39,189,106],{},[39,191,192],{},"Resistor\u002Farming board",[21,194,195,198,201,203],{},[39,196,197],{},"2",[39,199,200],{},"RJ45 PCB jacks (box) + 2 RJ45 breakouts (headband)",[39,202,106],{},[39,204,205],{},"Detachable headband",[21,207,208,210,213,216],{},[39,209,197],{},[39,211,212],{},"Network cable 1–2 m: Cat5e, Cat6 or Cat6A",[39,214,215],{},"Unshielded is fine",[39,217,218],{},"8 twisted pairs for 8 coils; solid-core Cat6A needs strain relief and 23 AWG-rated plugs or keystone jacks (docs\u002FWIRING.md)",[21,220,221,223,226,229],{},[39,222,41],{},[39,224,225],{},"Neoprene \u002F elastic headband, 6–8 cm wide, with Velcro",[39,227,228],{},"Sports or EEG headband",[39,230,231],{},"Movable coil mounting",[21,233,234,236,239,241],{},[39,235,41],{},[39,237,238],{},"Velcro (hook) dots",[39,240,106],{},[39,242,243],{},"Coil clips",[21,245,246,248,251,254],{},[39,247,67],{},[39,249,250],{},"Nylon M3 screws, 8–10 mm",[39,252,253],{},"Non-magnetic",[39,255,256],{},"Coil mounting into the ferrite core",[21,258,259,261,264,266],{},[39,260,41],{},[39,262,263],{},"Kapton tape, heat-shrink, epoxy\u002Fhot glue",[39,265,106],{},[39,267,268],{},"Protect the windings and leads",[21,270,271,273,276,279],{},[39,272,41],{},[39,274,275],{},"USB power bank, 5 V ≥ 2 A",[39,277,278],{},"With \"low-current\u002Falways-on\" mode if possible",[39,280,281],{},"Battery-only operation",[21,283,284,286,289,291],{},[39,285,41],{},[39,287,288],{},"Enclosure ~120 × 80 × 40 mm",[39,290,106],{},[39,292,293],{},"Control box",[21,295,296,298,301,303],{},[39,297,41],{},[39,299,300],{},"Sleep mask \u002F blindfold",[39,302,106],{},[39,304,305],{},"Session setting (darkness)",[10,307,309],{"id":308},"optional","Optional",[15,311,312,321],{},[18,313,314],{},[21,315,316,318],{},[24,317,29],{},[24,319,320],{},"Use",[34,322,323,331,339,347,355],{},[21,324,325,328],{},[39,326,327],{},"MMC5983MA or LIS3MDL I2C breakout",[39,329,330],{},"Magnetometer for precise calibration",[21,332,333,336],{},[39,334,335],{},"8-channel USB logic analyser (24 MHz)",[39,337,338],{},"Verify SPI\u002FLDAC timing",[21,340,341,344],{},[39,342,343],{},"Multimeter",[39,345,346],{},"Bench test, resistor voltages",[21,348,349,352],{},[39,350,351],{},"Second ESP32 + AD5328 + 8 coils",[39,353,354],{},"Yoked two-person telepathy (Persinger 2010 style)",[21,356,357,360],{},[39,358,359],{},"OpenBCI \u002F ADS1299 EEG",[39,361,362],{},"Check the claimed theta\u002Fgamma changes yourself",{"title":364,"searchDepth":365,"depth":365,"links":366},"",3,[367,369,370],{"id":12,"depth":368,"text":13},2,{"id":76,"depth":368,"text":77},{"id":308,"depth":368,"text":309},"Every part of the helmet with quantities and notes.","md","hardware\u002FBOM.md","Build it","Parts list",{},true,7,"\u002Fdocs\u002Fparts","docs",{"title":5,"description":364},"parts","hardware\u002FBOM",null,"5yJGkgUcKVqxn6KuaN1DZCE7_rzpvFXaDZlXCtOxWG8",[387,396,404,405,413,422,430,439,448,456,464,473,480,488],{"path":388,"title":389,"description":390,"section":380,"slug":391,"label":392,"group":393,"order":394,"minutes":378,"updated":384,"file":395},"\u002Fdocs\u002Foverview","God Helmet: 8-coil weak-field headset (ESP32 + AD5328 + web app over Bluetooth or USB)","What the project is, what is in the repository, quick start and current status.","overview","Overview","Start here",5,"README.md",{"path":397,"title":398,"description":399,"section":380,"slug":400,"label":398,"group":393,"order":401,"minutes":402,"updated":384,"file":403},"\u002Fdocs\u002Fsafety","Safety","Who must not use the helmet, the rules for every session, and the safeguards built into the firmware.","safety",6,29,"docs\u002FSAFETY.md",{"path":379,"title":5,"description":371,"section":380,"slug":382,"label":375,"group":374,"order":378,"minutes":368,"updated":384,"file":373},{"path":406,"title":407,"description":408,"section":380,"slug":409,"label":407,"group":374,"order":410,"minutes":411,"updated":384,"file":412},"\u002Fdocs\u002Fwiring","Wiring","Schematic, coil leads, pin tables for each supported board, the arming switch and cable pair mapping.","wiring",8,15,"docs\u002FWIRING.md",{"path":414,"title":415,"description":416,"section":380,"slug":417,"label":418,"group":374,"order":419,"minutes":420,"updated":384,"file":421},"\u002Fdocs\u002Fcalibration","Bench test and calibration","Bench test of the module, wiring checks, and measuring µT per mA with a phone.","calibration","Calibration",9,4,"docs\u002FCALIBRATION.md",{"path":423,"title":424,"description":425,"section":380,"slug":426,"label":427,"group":374,"order":428,"minutes":378,"updated":384,"file":429},"\u002Fdocs\u002Fstandalone","Standalone display board","Running the helmet from the 2.8\" display board without phone or computer: flashing, the SD-card program pack, clock and screens.","standalone","Touchscreen board",10,"docs\u002FSTANDALONE.md",{"path":431,"title":432,"description":433,"section":380,"slug":434,"label":432,"group":435,"order":436,"minutes":437,"updated":384,"file":438},"\u002Fdocs\u002Fplacement","Coil placement","The 10-10 system, finding sites with a tape measure, the standard and program-specific layouts, depth and field per target.","placement","Use it",11,42,"docs\u002FPLACEMENT.md",{"path":440,"title":441,"description":442,"section":380,"slug":443,"label":444,"group":435,"order":445,"minutes":446,"updated":384,"file":447},"\u002Fdocs\u002Fexperiments","Testing it honestly: blinded sessions and psi trials","Blinded real and sham sessions, remote-viewing and telepathy protocols, and the statistics behind the results table.","experiments","Experiments",12,33,"docs\u002FEXPERIMENTS.md",{"path":449,"title":450,"description":451,"section":380,"slug":452,"label":453,"group":435,"order":454,"minutes":378,"updated":384,"file":455},"\u002Fdocs\u002Fguides","Guided sessions (\"Guides\")","The guided-session format, the audio engine and how guides arm the helmet.","guides","Guided sessions",13,"docs\u002FGUIDES.md",{"path":457,"title":458,"description":459,"section":380,"slug":460,"label":458,"group":435,"order":461,"minutes":462,"updated":384,"file":463},"\u002Fdocs\u002Fquestionnaires","Questionnaires","The questionnaires used in guides, their sources, licences and scoring.","questionnaires",14,20,"docs\u002FQUESTIONNAIRES.md",{"path":465,"title":466,"description":467,"section":380,"slug":468,"label":469,"group":470,"order":411,"minutes":471,"updated":384,"file":472},"\u002Fdocs\u002Fsignals","Signals: what the coils play and where it comes from","What the coils play: coil physics and exposure limits, the Persinger-lab signals rebuilt from primary sources, vendor signal families and clinical timings.","signals","Signals","Reference",44,"docs\u002FSIGNALS.md",{"path":474,"title":475,"description":476,"section":380,"slug":477,"label":475,"group":470,"order":478,"minutes":410,"updated":384,"file":479},"\u002Fdocs\u002Fpreset-format","Program file format","The program file format, every signal and coil mode, the pulse-table generators and the preset checker.","preset-format",16,"docs\u002FPRESET_FORMAT.md",{"path":481,"title":482,"description":483,"section":380,"slug":484,"label":485,"group":470,"order":486,"minutes":420,"updated":384,"file":487},"\u002Fdocs\u002Fbrain-view","Brain view: how the field map is made","How the field map on the brain is computed, how accurate it is, and the data and licences behind it.","brain-view","Brain view",17,"docs\u002FBRAIN_VIEW.md",{"path":489,"title":490,"description":491,"section":380,"slug":492,"label":493,"group":470,"order":494,"minutes":436,"updated":384,"file":495},"\u002Fdocs\u002Fprotocol","Bluetooth LE and USB protocol","The Bluetooth service, packet framing, the USB line protocol, every operation, session JSON and the trial commitment.","protocol","Device protocol",18,"docs\u002FBLE_PROTOCOL.md",1794317839966]