i am looking for latching type solenoid with relative big "moving object" (dont know how its called the stick that moves)
i would like diameter of this to be at least 1cm , and preferable from a seller in European Union, 12volt coil is the ideal but smaller rated are good too
i have found 66-120-610-620 in farnell but it has small "moving object"
@ericgibbs your first suggestion is the exact model i said wich i believe is has small diameter plunger (7mm)
second one has the same diameter plunger too..
@Pommie i cant see the plunger there, neitehr it looks like latching (is it ?)
if i manually pull out plunger , correct voltage brings it back and hold it , strong enough, however aplying reversed polarity has no (or almost) no differnce in holding back power.
thats not what i understand as "latch" is it ?
Single coil construction. Apply +ve on Red to operate and -ve on Red to release. An External force is required to retract the plunger to the open position.
That is a latching action. The coil only needs a brief pulse to pull the plunger in (against the external force) or release (so that the external force can pull the plunger back out).
but shouldn't ,after the pulse aplied and the plunger returned to inner position a force strong enough hold it ?
what i mean is that if is holded with a force of 100gram (for example) without applying any power to coil, when applying negaltive polarity this force must SIGNIFICANT reduced ? ,
as i see it applying no voltage ,or reversed voltage the power is equal.
therefore a spring will pull out plunger without applying any voltage ?
No, it isn't. If - voltage is applied briefly to the Red terminal the coil produces a significant force opposing the permanent magnetic force, so the plunger is no longer held strongly and a spring (or whatever) can then pull the plunger out with a force much less than 0.4kg.
here i created a video showing how it is work , i dont think that with negative voltage has ANY difference in magnet power compared to when NOT APLYING voltage AT ALL
here i created a video showing how it is work , i dont think that with negative voltage has ANY difference in magnet power compared to when NOT APLYING voltage AT ALL
Apologies for butting in here, but after reading through this topic and now watching your video, I notice that you are making conclusions based on using a fixed dc battery supply
.......doesn't the datasheet in the first few lines state "pulsed dc" ?
.......just my 10p's worth of observation