Logic Relay
 KIT - relay board simple to use 5v operation supports logic level also (16AMP) US $5.50 
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 KIT - relay board simple to use 12v operation supports logic level also US $3.93
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1949 SIMON: 1st Personal Computer Relay Logic GENIAC IBM ASCC ENIAC Giant Brains, Banner Engineering CL5A Logic Relay 26681, programmable 3-relay logic module, HEALD RELAY LOGIC CIRCUIT BOARD CARD 52-83 5283, HEALD RELAY LOGIC CIRCUIT BOARD CARD FORM 1A-1B 52-88 5288 21-8039 218039, HEALD RELAY LOGIC CIRCUIT BOARD CARD 21-7963 217963 52-83 5283, #TELEMECANIQUE SR1 A201BD ZELIO LOGIC PROGRAMMABLE RELAY, Brown Boveri BBC Delay Relay Module Logic Card GH R 412 0001 R1, NEW Square D Motor Logic SFB20 Class 9065 Series C Relay, BANNER RELAY DELAY LOGIC MODULE / MA5 / 25483, 1960s NIXIE Tube Analog Op Amp Transistor SCR NE-2 Relay Computer Logic Circuits, POTTER & BRUMFIELD 2I0-4B LOGIC RELAY MODULE Allen Plc, GE 193X265AAG04 LOGIC RELAY CONTROL BOARD, Moeller EASY512-DC-RC DC Programmable Logic Controller 24V DC 4-Relay Din, Crydom DMP6101A IDC5-A Optically Isolated relay module 24 vdc in 5vdc logic out,