cant trigger relay with LPT port
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hi everyone, i have two relays that read as: (RadioShack) Coil rating of 5VDC 90 mA 55 ohms SPDT 1A at 125VAC (FANGKE) 10A/28VDC 5A/220VAC DC 5V please advice why cant i trigger them using the 5v from the LPT port:wtf: thanx in advance.
Have you used a multimeter to confirm you're providing the amount of current and voltage that the relay requires to switch over? IIRC the LPT port is a relatively low power interface, it might not be able to provide sufficient power to work the relay.
-- Rules of thumb should not be taken for the whole hand.
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hi everyone, i have two relays that read as: (RadioShack) Coil rating of 5VDC 90 mA 55 ohms SPDT 1A at 125VAC (FANGKE) 10A/28VDC 5A/220VAC DC 5V please advice why cant i trigger them using the 5v from the LPT port:wtf: thanx in advance.
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thank you mark, but that was so sophisticated for me to understand cuz i've nothing to do with electronics and i just wanted to trigger a relay using the power from LPT port, can you please suggest another relay that will trigger directly without making any circuit?? :confused: thank you mark!
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Have you used a multimeter to confirm you're providing the amount of current and voltage that the relay requires to switch over? IIRC the LPT port is a relatively low power interface, it might not be able to provide sufficient power to work the relay.
-- Rules of thumb should not be taken for the whole hand.
you're right dan! i thought LPT is always providing 5v. here's what i got 3.34 DCV 46 mA i just found this relay on radio shack, do you think it will work with the amount of current i have?? Maximum switching power of 10 (Watt/VA) Maximum switching voltage of 60 VDC, 120VAC Maximum switching current of 0.5 A Maximum initial contact resistance of 150m ohms thank you dan!:)
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Have you used a multimeter to confirm you're providing the amount of current and voltage that the relay requires to switch over? IIRC the LPT port is a relatively low power interface, it might not be able to provide sufficient power to work the relay.
-- Rules of thumb should not be taken for the whole hand.
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hi everyone, i have two relays that read as: (RadioShack) Coil rating of 5VDC 90 mA 55 ohms SPDT 1A at 125VAC (FANGKE) 10A/28VDC 5A/220VAC DC 5V please advice why cant i trigger them using the 5v from the LPT port:wtf: thanx in advance.
The LPT port isn't rated to deliver that much current, you will need a driver circuit plus the voltage from the LPT port under higher current isn't 5 volts. Elaine :rose:
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The LPT port isn't rated to deliver that much current, you will need a driver circuit plus the voltage from the LPT port under higher current isn't 5 volts. Elaine :rose: