Hi my name is Peter. I am from Germany.
For a few days i bought the perimter sender an receiver board in your shop.
It works nearly perfect but one coil side on the detecor board doesnt change behavior when i connect the coil to this.
In normal when the receiver board is powerd on an the coils are connectetd, the signal goes to nearly 0V.
that happens only on Signal 2 out. On Output Sig1 nothing hapens. The ouput is permanently at 3,89V.
If i come nearly to the perimeter wire the signal grows up on sig 2. On the “defect” side there is only a little jittering.
For my simple detection i read the two analog signal and compute the amplitude. this is a simple sign to be in the near of the wire.
the sig2 should have the same behavior right?!
Can you give me a hint what i am doing wrong. is ist poor soldering ore some damaged parts.
Thanks Peter
@Peter3006 The two channels are identical, so there should not be any reason why one side works and the other does not. Some things to check include:
- Soldering (make sure there is no solder touching between components, and that there is proper contact between the solder and each pad. If you’re not sure, take some very clear photos of the board and provide them here.
- Wrong component placement and/or orientation. Check that the components are in the right places and right orientations based on the assembly manual.
- Wires properly stripped and inserted into the screw terminals
- Proper wiring between the board and your MCU
- Proper code uploaded to the CMU with the correct pinout
Hi Mr. Benson,
thank you for your quick reply. i controlled everything many times and makes the soldering a second time.
but nothing happens. The Sig1 Out never changes the voltage
Could it be a defekt of the LM324N ?
What do you think?
Anything’s possible, though those chips are all new. A few things to check (yes, some might seem really silly, but…):
Can you verify the connection and pinout between the board and the MCU?
- S1 = signal 1 (check which analog pin on the MCU and verify the code uses the same pin)
- S2 = signal 2 (check which analog pin on the MCU and verify the code uses the same pin)
- 5V (only need one of the two connected)
Swap the sensors / inductors (change the screw terminals) to see if it might be the soldering to the wires, or even the wires themselves.
Check that the screw terminal is making proper contact with the metal core of the cable (in case it might be pressing against the shielding).
How are you powering the generator? Can you provide the voltage and current rating? Did you play with the potentiometer?
Hi.
Ok i cheked the Pins:
S1 goes to Out2 Pin7
S2 goes to Out4 Pin14
I solder the inductors wires directly to the pins of the screw terminals.
I power up the board with a 5 V out from an Arduino Uno only on one 5 V input Pin on the receiver Board.
I also verify that the coil input goes to the right pins on the lm324. inductur 1 goes to input 1 (pin3)
inductur 2 goes to input 3 (pin 10)
How are you powering the generator? Can you provide the voltage and current rating?
Did you play with the potentiometer?
I use a 12V/2A power generator. Yes i played with the poti and i have a amplitude about 700 points on the sig1 out.
on the sig2 out the is only a little flickering.
the behavior should be the same on both channels right?!
Both sides are identical, so the output should pretty much also be identical. Consider the cable length and location and orientation of the sensors though. Cannot spot any evident reasons, but if you’d like, this topic can be transferred to internal support.
In the moment i work only with the receiving side. I will describe my testing:
I take an arduino uno and connect the board with 5V Ground and Sig1 with A0 and Sig2 with A1
Then i monitor the output with the serial console.
Serial Out -> LCoil;794;RCoil;793
When i put a Jumper Wire (not a coil) to the right coil connector (MCU Input to Ground) the output goes to 0V
On the Left Coil Connector i do the same and nothing happens. Normaly it should go ti zero too, right?
i messure every connection on the board with a multimeter and every thing seams to be fine.
In the moment i am very helpless.
Yes you can transfer to internal support.
This topic was transferred to internal RobotShop Support.
