DuPont Polarizing Pin Plug
Description
These Tiny Items Fit Into Dupont(R)-Style Pin Header Housings To Prevent Plugging It In Unless A Pin Has Been Omitted In That Location. This Allows Reasonable Polarization Protection While Using Common 0.1" (2.54Mm) Pin Headers That Normally Could Be Plugged In Backwards. This Worked Great For A 3-Conductor Cable; I Just Used A Four-Position Housing And Plugged Up One Of The Interior Holes. The First Picture Shows That Preventing Backwards Connection. For A 6-Pin Cable, I Didn'T Want To Add Just One Position Because 7-Position Housings Are Uncommon. So I Added 2 Positions And Made A Double Plug For Convenience. This Is Shown In The Second Picture. I Had Been Using Jst'S Mht Connectors On The Board Because They Are Polarized. But Scaling This Up Proved A Problem Because The Us$40 Crimping Pliers I Found For Them Requires Separate Crimp Steps For Wire And Insulation While The Us$20 Iwiss Crimper Does The Wire And Insulation On The Dupont-Style Pins At The Same Time. I Really Don'T Love Crimping, We Couldn'T Find Anyone To Make Our Odd Cables For Us (All That Hot-Melt Is To Reinforce The 30Ga Silicone Wires From A Slip Ring... Quite Finicky To Work With) Near As I Can Figure Out Online, These Are Called Dupont-Style Connectors Because The Dupont Chemical Company Developed Them As An Application Of One Of Their Flame-Retardant Plastics. The Manufacture Of Them Is No Longer Done By The Dupont Company. So, (R)/Tm As Appropriate On The Name Dupont.
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