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Key fob remote trigger
- Thread starter mcmahok
- Start date
Yeah the lights flash as indicated in the instructions. So it seems to work but who knows if it actually does?
No, it stays the same. should it change?
Hi McM,
Stays the same? is it 5V or 0V?
The blue is+V and the white-V, have they ever touched together?
Have you disconnected it from the servo, while testing? I think you should, but keep them apart.
Can you read anything on the black square near the leads?
C
Stays at 5v all the time. The wires haven't touched. Yes I disconnected it from the servo. I get 0 from the black square.
Hi McM,
To me the black square looks like a Mosfet, which is a switch, that may be 'latched' on.
I'm puzzled that the Led doesn't go on/off when you switch the buttons on the transmitter.
Try removing all power from both units, and check the voltage then.
C
The LED does light up when I press the button on the remote.
disconnected power, 0V
Hi McM,
That sounds like it's latching, or faulty.
Try connecting the voltmeter to the receiver, and check the voltage, then add power, check voltage and led, then add battery to the transmitter, check voltage and led, then press buttons on transmitter, check voltage and led.
C
Yeah I think it might be faulty after all. It was only £3
So 0v then up to 5.1v, LED works.
Then 0v up to 5v again, LED works
Basically everything looks like it works but it doesn't
Hi McM,
For more clarity, can you try again, as my questions in #31 please?
When I say Led and voltage, I mean the output voltage.
C
Sorry I thought I did answer that. It all just stays at either 0v or 5v. I'm not sure we're going to get to the bottom of this as I'm clearly out of my depth here. If I connect the meter to the LED and push the button it goes from 0 to 2.4v When power is disconnected from the receiver it reads 0v, The transmitter (the remote?) has it's own batteries. I appreciate your time in trying to help me with this, but I don't think I'm capable enough to do the things you are asking me to do.
Hi McM,
You are capable, because you've just done it. It sometimes takes me ages for the penny to drop, so don't worry. That is if you would like to learn what you are trying to do?
I'm no expert, but what I'm trying to do is figure out how the thing works.
You have to be clear what you say, so that we can figure things out (If we know what we're doing) :0
When you say "press the button", there are 2x buttons!
If you disconnect 'all' power, then connect it 'all' again, is the led on or off and is there voltage at the output?
C
Looking at the wiring diagram for the receiver module it appears that the output is switching low. I suspect that the Red and Blue wires are connected together. When not activated (LED OFF) there should be 5 volts on the Black wire and 0 volts when activated.
If that is the case then the module is working but without a PWM signal nothing will happen.
If that is the case then the module is working but without a PWM signal nothing will happen.
Hi S,
I note in #37, the ouput voltage is 2.4V, which appears to indicate that the white wire outputs PWM'
McM,
If it's PWM, then PWM is switching the white wire fast between 5V and 0V which looks like 2.4 v to a voltmeter.
IF THIS IS TRUE, then connect the Blue wire to RED on your servo, bring a second black from the black wire to black on the servo, and white to the orange on the servo. (Perhaps get a second opinion first
EDIT: I've just looked more clearly at the ALI website and if you scroll down to the bottom it shows instruction, how to set it all up.Try that first.
C
