Hi forum

First of all, I'm a total newbie, so please bear with me, or direct me to the proper place, should this not be it.

My issue is this: I have a moped, which is limited to a certain top speed using a magnetic pickup placed by the rear wheel. This pickup sends pulses about the rear wheel rpm's to the CDI unit, which lowers the engine rpm's accordingly once the rear wheel reaches the set top speed. This one wire can be disconnected before the CDI, which causes the moped to run at it's designed top speed.

What I want to be able to do is, by a wireless relay, to either connect or disconnect this wire, thus enabling or disabling the limiter system.

So far I've received a two channel wireless relay from China, which will do the job. The problem is, that it will go back to disconnect state once I release the button on the remote. I need to somehow be able to click the remote once, and then the relay will stay in that position until I press the button once more. It seems that this particular relay isn't capable of doing that. Can I somehow add a SSR to it, that can do the job? I have some AQV101 SSR laying around...can I use them, or will I need to get med some other type of mechanical relay?

The China remote relay is 12V DC driven, and the relays have the following pins out: One is signal in, one is signal out, for when the button is pressed, and one is ground. I've currently configured it to send 12V DC + to the signal out, so that it can activate something that could do what I'm looking for. I hope I'm making sense, and that someone can help me with my little problem.

Best regards

 

Do you have any specifications on the relay?
If it's two channels, does it have two relays?
Sounds like you may need a wireless receiver that has a latching option for the relay.
For example this has a lock and unlock button which presumably closes and opens a relay contact.

 

Hi

Mine looks pretty much like the one you've linked to, only it has two relays : http://www.miniinthebox.com/12v-2-c...-remote-controller-dc14v-ac125v_p1636344.html

Could be that it has no latching option, since there is only two buttons on the remote, I don't know?

I'm not sure about the specs, only that it takes 12V DC in. The two relays have this inscribed on them: WQE Weiqi - 10A 120VAC - 20A 14VDC - WL 78-C-112 - Coil 12VDC 0,6W

Hope it helps.

 

Perhaps I could connect a mechanical relay to the wireless gizmo, would that solve the problem?

 

Perhaps I could connect a mechanical relay to the wireless gizmo, would that solve the problem?

A standard relay would not help.
You could use an alternate-action latching type relay, but those are not common.
You could add a CMOS flip-flop, such as a CD4013 connected as a toggle circuit to control an external relay.
The flip-flop would change states for every pulse from he remote.
That circuit could probably be kludged unto the remote circuit board if you know someone handy with electronics.

All in all it's probably simpler (and cheaper) just to buy a latching remote control relay, such as the one of these.

 

Ok. I just ordered one of these: http://www.ebay.com/itm/DC-12v-10A-...er-/271815209035?_trksid=p2141725.m3641.l6368
the first one you linked to...should I cancel that order, or will it fit my need you think?

Edit: It seems the second one you linked to takes 220 VAC in, which won't work with my 12VDC...or?

 

one problem with all China made products is - utter lack of documentation or even decent description. somehow they just cannot get it through their skulls that low price is not everything. most units should allow some sort of configuration , here is one that uses jumper and has description (https://www.aliexpress.com/item/12V...em-Control-Switch-Transmitter/1384267658.html):

 

Ok. I just ordered one of these: http://www.ebay.com/itm/DC-12v-10A-...er-/271815209035?_trksid=p2141725.m3641.l6368
the first one you linked to...should I cancel that order, or will it fit my need you think?

Edit: It seems the second one you linked to takes 220 VAC in, which won't work with my 12VDC...or?

The one your ordered would appear to be what you want.
Having two buttons on the remote for one relay, with one button showing the lock icon and the other unlock, would indicate to me that it's a latching type circuit, but the description is so sparse it's difficult to know for sure.

Don't know about the second unit.

 

here is one that uses jumper and has description (https://www.aliexpress.com/item/12V...em-Control-Switch-Transmitter/1384267658.html):

That would also appear to be a non-latching type relay control, with the two buttons momentarily actuating their respective relays.

 

Thanks for your opinions, guys..it makes sense what you're saying, crutschow. I sure do hope it'll solve the matter . And yes, I agree that most chinese electronics lack instructions and specs, and many are pretty shoddy too...I just scrapped a wireless alarm system from HK . I guess there's truth to the claim that you get what you pay for.

Thanks again, have a nice one.

 

That would also appear to be a non-latching type relay control, with the two buttons momentarily actuating their respective relays.

it has three settings: Latch, Toggle, Momentary.

 

Why does it need to be wireless? Can't you mount a simple switch on the moped someplace that breaks that sensors signal?

I mean obviously you are cutting into a wiring harness someplace to mount the receiver and contorl unit for the wireless system so that break in that circuit can obviously be rerouted to a switch some place. .

 

Well, that would be the obvious choice....and I've given it some thought also. What I've done so far is lengthening the wire to be able to put in some equipment to do the job, but a physical switch will be too obvious. It comes down to that it's basically illegal to make any changes to the vehicle, and if it's pulled over by police they may require it to be tested for top speed at a portable roller, which most patrol cars carry with them. In that case I want to be able to switch back to "legal mode" without anybody noticing any clicking on mysterious non factory buttons beforehand.

 

Easy onboard solution to that. Just put a magnetic reed switch under the body that when activated either disconnects or short circuits the sensor and when the magnet is removed reconnects the sensor. Passive, easy to work with and very easy to hide in plain site.

 

Many of the wireless relay modules state explicitly that the module has several jumper-selected operating modes, such as momentary and alternate-action. Look for one with alternate-action.

ak

 

Easy onboard solution to that. Just put a magnetic reed switch under the body that when activated either disconnects or short circuits the sensor and when the magnet is removed reconnects the sensor. Passive, easy to work with and very easy to hide in plain site.

But that would require me to put a magnet near the thing right...or am I getting it wrong? I would think it's possible to get a 12VDC operated reed relay that would work with my wireless thing, but won't the reed switch revert to it's normal state again as soon as the current stops flowing, that is when I release the remote button?

 

Yes the reed switch would activate (close) as long as a magnetic field is near it.

I'm just making suggestions for ways to incorporate the bypass into the scooter opposed to having to carry a remote control around being those things get lost and broken fairly easy.

As for the getting pulled over for speeding they will have had to spot you visually plus have either tagged you on radar or by following you directly to see if you were in fact going too fast so your ploy to say you can't speed and claim to be able to prove it is useless any way. Especially now that the vast majority of law enforcement have cameras recording everything they see anyways.

Law enforcement are not that dumb and will know that something is up and if they find a cheater unit on your scooter you will be in even more trouble for more that just the speeding ticket.

Maybe you think your local law enforcement are stupid but all you need is one run in with a smart one with a camera system and you're in way more trouble than you will care to be paying for.

 

I hear you, tcmtech. Only here in dk, they don't' use radar but laser, and that only on cars. So it'll be from visual suspicion only, but they carry with them this portable roller speed test bench. And I usually don't go too fast when cars are near or passing me anyways, so what I'm hoping for is that they'll be somewhat in doubt whether or not I was going too fast. And they won't take the scooter apart, or have me do it, if they've measured it's top speed to be ok. As to the reliability of the system, well...that's just the joker in the game .

But yes, it's a risky business...strike two and they'll take the scooter on top of a hefty fine.