TITLEBAR##$cfgWebTitle - Metal Detectors - Projects - Hammerhead VAR1##$cfgBasePagesUrl/metdet/projects/hammerhead VAR2##$cfgIndexScript?page=metdet/projects/pi1&file=index.dat TITLE##Hammerhead CATEGORY##by Carl Moreland TEXTIMAGE##projects/hammerhead/hammerhead.jpg TEXT## Hammerhead is a Pulse Induction (PI) metal detector. The primary purpose of this design is to provide the experimenter a platform with which to learn the operation of PI. For that reason, all operating parameters are variable through hardware controls, so that the user can test performance for a variety of settings. Hammerhead is not intended to compete with commercial PI detectors in performance; however, the design is very similar to many mainstream PI detectors, so it is possible to get similar performance. SMT PC boards are available. These are a high-quality surface-mount PCB (two-sided) using SOIC chips and 0805 passives, with solder mask and silkscreening. The SMT boards are a small 2.3 x 2.0 inches, ideal for making a probe, or even mounting in a headphone cup, such as the Headhunter PI. NOTICE: I have no more standard through-hole PCBs. Please DO NOT place orders for these, because I will not be able to process your order. I have only SMT boards. The GERBER files for the through-hole board are also posted below, so you can have a PCB made if you wish. I have no plans to make any more thru-hole boards, sorry. In the US, Canada, and Mexico PC boards (either type) are $10 each shipped. For most everywhere else, they're $12 USD. For US orders, I accept cash, check, US Postal money order, or PayPal. For everywhere else, I prefer PayPal, but will accept cash as long as it factors the current exchange rate, and is in bills (no coinage). Mail payment to: GeotechP.O. Box 184Oak Ridge, NC 27310 Paypal ID is [e-mail]. END SPACER##10 SPACER##5##FFCC00 TEXT##The Hammerhead construction article: LINKS Hammerhead Article##$var1/HHv1p5.pdf##HHv1p5##_top##(PDF-1114K, 300dpi) - Rev 1.5 -- 21 July 2006 END SPACER##10 SPACER##5##FFCC00 TEXT##Here is the schematic & placement diagram for Rev D. Please note that the construction article above is valid for the Rev C PCB. Differences are minor; compare with the Rev C schematics below, or visit the forum for more info. LINKS Full schematic & placement##$var1/HHd1.pdf##HHd1pdf##_top##(PDF-671K) - Rev D1 -- 07 Feb 2007 END SPACER##10 SPACER##5##FFCC00 TEXT##There are three schematics currently available: the full schematic has everything that is laid out on the PC board, including optional components. The "Option 1" schematic is a little simplified, and is set up with VCO audio. The "Option 2" schematic has non-VCO audio. The schematic PDF files also include a parts-placement diagram. These files are for the through-hole PCB: LINKS Full schematic & placement##$var1/HHc2.pdf##HHc2pdf##_top##(PDF-345K) - Rev C2 -- 31 May 2006 Opt1 schematic & placement##$var1/HHc2_opt1.pdf##HHc2Opt1pdf##_top##(PDF-338K) - Rev C2 -- 31 May 2006 Opt2 schematic & placement##$var1/HHc2_opt2.pdf##HHc2Opt2pdf##_top##(PDF-334K) - Rev C2 -- 31 May 2006 END SPACER##10 TEXT##These are the schematics & parts placement diagrams for the surface-mount PCB. They are almost identical to their corresponding through-hole versions, except that there is no active turn-off option for Q3 (i.e., R7, R8, and R15 are omitted), and Q11 is inadvertently labeled Q4 on the SMT PCB. LINKS SMT Full schematic & placement##$var1/HHc2smt.pdf##HHc2SMTpdf##_top##(PDF-210K) - Rev C2 -- 31 May 2006 SMT Opt1 schematic & placement##$var1/HHc2smt_opt1.pdf##HHc2SMTOpt1pdf##_top##(PDF-194K) - Rev C2 -- 31 May 2006 SMT Opt2 schematic & placement##$var1/HHc2smt_opt2.pdf##HHc2SMTOpt2pdf##_top##(PDF-192K) - Rev C2 -- 31 May 2006 END SPACER##10 TEXT##Here are the PCB layouts for both Rev C & Rev D, please note that it is 2x. Also the Gerber files for both revs, for those who want to import them into their CAD program for modification: LINKS Through-hole PCB Layout (2x)##$var1/HHd1_pcb.gif##HHd1PCBgif##_top##(452K GIF, 600dpi) - Rev D Through-hole PCB Gerber files##$var1/HHd1_gerber.zip##HHd1Gerber##_top##(180K ZIP) - Rev D END SPACER##10 LINKS Through-hole PCB Layout (2x)##$var1/HHc1_pcb.gif##HHc1PCBgif##_top##(246K GIF, 600dpi) - Rev C Through-hole PCB Layout (2x)##$var1/HHc1_pcb.pdf##HHc1PCBpdf##_top##(PDF-287K, 600dpi) - Rev C Surface-mount PCB Layout (TIFF)##$var1/HHc1smt_tiff.zip##HHc1SMTtiff##_top##(113K ZIP) - Rev C Through-hole PCB Gerber files##$var1/HHc1_gerber.zip##HHc1Gerber##_top##(133K ZIP) - Rev C Surface-mount PCB Gerber files##$var1/HHc1smt_gerber.zip##HHc1SMTGerber##_top##(79K ZIP) - Rev C END SPACER##10 SPACER## HR##5###FFCC33 SPACER## TEXT## Click Here for older board revisions. END #TEXT## #Comments/feedback/notes: #END