Another so called flip flop latch relay module test
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- Relay module used in video has been added to my amazon product storefront. link below
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#electronics #relay #module
Sounds like you are looking for a dual coil latching relay.
I think it's called a dual coil passive latching relay? Or something like that.
One coil is pulsed to set the contacts and the other coil is pulsed to reset the contacts.
I don't know what the exact terminology is for these but I think you could probably find them on aliexpress, banggood or alibaba.
You may also be able to use a mechanical latching relay for what you want to do?
Mechanical latching relays use a locking mechanism to hold their contacts in their last set position until commanded to change
state, usually by means of energizing a second coil. Since the relay does not rely on a magnet, the locking strength will
not degrade over time or weaken during thermal cycling. The contacts will remain locked in the directed position until the
opposing coil has been energized. Packaging machinery that places several units into a single container would be a good
example.
Thanks for the tips!
Not surexwhy you would want a circuit to stay energized when power is released, but I'm sure there are some applications. This is exactly what I need as I want a no volt release circuit and this will simplify wiring in a second relay and allow me to use simple NO switches to trigger. Only negative is I need a 12V coil.
If you are switching high power loads, and using power from the outlet instead of batteries, then it would likely be cost effective to still use a relay that needs to be energized to hold it's position. I am guessing that it is almost always cheaper though, because relays that latch into either position without staying energized were relatively hard to find when I last looked.
This is just a pulse operated relay, not a bistable relay.
A bistable relay has 2 conditions, no matter what the starting condition is, be that N/O or N/C. When power is put onto a bistable relay and a pulse is used to activate it, the relay flips into its second state and draws 0 current, In fact if you remove power at this stage, the relay should do nothing except keep its last state. If you want to reduce the current and save power with these types of relay you could add an RC network in series with the coil. 1,000uF and a resistor calculated to reduce the relay Voltage by as much as 2/3. Use a variable resistor to check for holding current, then use a slightly higher npv resistor. This will hold the relay in and reduce current.
Thanks. But I too am disappointed. I’m looking at Tyco relays like the one in this article. The triggering is the same but no current since nc and no does not apply to latching relays I guess? It would be interesting to look at diode protection on latching relays also and discuss using very low power mosfets like those used in VICTRON smart battery protect. But mosfets do seem to leak a small amount of current. Thanks again.
Right now I am just looking at the low priced options. Both to save me money while I'm gaining viewers, but also to learn and be able to someday explain the differences and options. Those are good topics though, I am studying up on MOSFETs quite a bit. For some reason their price is a lot more than mechanical relays and they are less available from what I found so far. So I'm trying to figure out why and which ones are worth buying. Thanks for watching again! I thought you moved on lol.
Very Nice Video
Thanks for watching!
You can probably desolder the relay for an IRFZ44n mosfet instead, they should not draw any current at all
1:46 You say that the "snap off". How is that possible when they are soldered on?
Each one of the individual relay modules can be snapped off. Not the soldered components.
@@Electronzap But at 6:41 you can plainly see that they are soldered on. How do the snap off?
@@Electronzap also I was wanting to buy one of these but the link you provided doesn't link to it just the main site. Do you have a direct link?
The whole unit should break off where that groove runs the entire length of the module.
Pretty sure this is where I bought mine :) amzn.to/2NLEcst