Hello,

I recently bought a Hiller 250 quad kit from rcbazaar with avionic RCB6i and Wolfpack battery..
I am completely new to this hobby and thought of building a quad on my own to start..
There were no instructions provided with the Hiller kit, but there are a lot of tutorials available on the internet for the same. I am having trouble connecting the sunrise cicada 20Amp Esc to the avionic 2300kv quad motors. As per instructions on the internet, it is just a direct snap fit connection between the esc and motors, but in this particular esc, there is no such connection. I also received a packet with a gold connector for the motor, but have no idea what it is for. Please help me out with the connection.. pics are attached.

The 4th picture seems to be female bullet connectors.  Solder them to the three wires of ESC and connect the three wires of motor to the ESC.

Alright I will try this out... thank you!

i discovered that these are OPTO ESC's , and they have a separate BEC. There is only 1 BEC and 4 OPTO ESC's.. please explain the connections for this?

Yes these are Opto ESC's i.e. without BEC
But the receiver and Flight Controller works on 5V so they have provided separate BEC.

First picture in #1 post shows the PDB (Power distribution Board - please share some more pictures from both the sides)
You are going to connect your all 4 ESC's here + BEC + battery.
ESC's Red wire should be connected to the +ve and black should be connected to the -ve without any mistake.  Same with the BEC.  Also you need to connect your battery here, which battery are you using? and FC?

I got a CC3D PDB and a CC3D openpilot FC with this kit. Battery I am using is WolfPack 1800maH 11.1v 25c. The battery has 2 sets of wires as seen below, which one would I be using to power the quad?

Have you bought the charger?

Yes, I have the charger too.. I charged the battery in the port you have labelled, but the port in which you have labelled to power the drone, I don't see any such connector or device which will fit in that port, they have not supplied that with the kit.

Then you will have to buy it separately. Its Deans T connector.

They also gave this battery tester alarm..

Guess it was a mistake on their part not supplying that connector. It is supposed to be an all in one kit.

Ya may be.  Try contacting them.  They might send you one for free.

Yes it is battery voltage checker, which shows you voltage of the battery and voltage of each cell individually.

Alright, thank you for your help..
I will update when I'm close to finishing this..

Good luck with the project.

Still searching for a dean connector.. in the meanwhile I decided to get the rest of the quad done.
Attached below is circuit diagram for normal ESC's. Since I have OPTO ESC's that came with a separate BEC, where would I connect the BEC in this diagram?

UPDATE: I got deans connectors from RcBazaar but not the wires.. so I split the wire of my lipo and soldered it on the connectors to both PDB and LIPO.

I wanted to test one of the motors before assembling the whole thing, so I did the wiring as posted in the picture, with the BEC soldered to spare terminals of the PDB and it's  other end connected to a spare channel on the CC3D FC.

NOTE: At this point, only one of the motors are connected to the bullets on the Esc.. the other Esc are left exposed but I have not connected them to the FC.

I decided to try this connection, so I slowly connected my LIPO to the PDB, before it was fully connected, i.e on contact with deans, it produced a sort of pop or crackling sound.. I immediately pulled it back, and tried again, The same thing happens.. I am afraid to fully connect the LIPO to the PDB now as it may cause some issues with the battery or the connections.. please help me with this.

More pictures

dont' worry that's just the high current connection pop from filling the capacitors on the esc...to be on the safe side just use a multimeter in continuity setting ( diode) and connect to the power input terminals....no beep should indicate good  connections and a beep will state a short circuit somewhere........go ahead and build the total craft....good luck! 

Are you sure about it?

Generally power is given to the receiver.

If you look closely at set of pins shown in pic no.1 post #3 you will find that one of the connector (first one) has three wires in it.  White + Red + Black i think it supplies power to CC3D from receiver.

Do extensive research.  Dont be in a hurry, be sure before plugging in anything, otherwise it will just waste your board.

Thank you!
I later understood this was normal and went ahead with the full connection.. the
FC lit up and started functioning normally.
No, that particular wire is actually input to the CC3D in the form of control signals and not power...it receives input from the receiver and makes the ESC's work. It also supplies power to the Receiver. I successfully bound the receiver and transmitter, but was not able to make that particular motor work. Maybe it is because I haven't connected the other motors, or the other wires required for the CC3D. I am almost done with the connections and will be testing the final product soon. I will update on this.

Happy to hear that.

UPDATE: I fully finished the quad and also did the setup wizard on LibrePilot for CC3D.

On giving even a slight throttle on the transmitter, the quad seems to lift erratically off the ground. i.e it doesn't lift straight up and it just lifts some sides, and some motors even turn off at times. I haven't flown this yet, as when giving full throttle it doesn't take off. I checked the LibrePilot and it doesn't seem to have any issues there, and is calibrated properly.

Also, one of the motors seems to get quite hot, while the others don't.

What could be the reason for this?
I am checking all connections and CC3D wizard once again, and I think the quad is quite balanced. But I am not able to fly this inside my house at all due to this sudden increase in motor power.. I will probably go to a field to test this first..

First test without propellers and find out if you have correct increment when you tilt the quad, next go with propellers and their appropriate spin. Make sure you have the quad set at beginner flight setting, usually best to have on 3-position toggle, and lift up in a field by fast throttle @ 30% and you should see lift in 30-50% throttle.
Good luck!

After calibration I had tried without propellers and it works properly, the motors increase power according to tilt. But with propellers on, it starts tilting to one side, and even on the slightest of throttle it revs the motors really fast... how do I set it to beginner mode? I didn't know there was such an option for CC3D. Please tell me where it is.. I appreciate your replies.

Go with the vehicle setup wizard and select appropriate stuff, you will come across transmitter configuration too, there after selecting 4 main flight control settings, you will be prompted  to assign a switch to your flight control mode, give atleast 3 slabs, and later checkout them in the inputs bar. It is normal to have sudden high revs when the fc is on ground but once in air it will be sweet!

I have finally got it in the air.. after proper calibration and propeller fitting, it is able to fly stable.. unfortunately I have run into 2 other problems. I was excited after flying this and wanted to test it in a ground, so I plugged the battery in, and nothing.. the b3AC charger was dead! Just after one full charge.. and then I was putting my battery back in the LIPO safe to store until I get another charger.. when the voltage checker alarm started sounding just as I was going to remove it from the battery.. overall voltage of the 11.1v pack was below 9v!!! 1st cell showed below 2v!! 2nd and 3rd cells were fine and they were around 3.4v.. I am completely confused now and I wrote to rcbazaar regarding the charger but not the battery as it happened after writing a mail to them.. does this battery pose a safety hazard? Is it reusable? Is it permanently damaged? Or did the faulty charger cause damage to the battery? I am awaiting a reply from RcBazaar and after that will tell them bout the battery too.. Wolfpack B3AC charger and Wolfpack 11.v 3 cell LIPO are less than 2 weeks old and I did not expect this to happen at all... thankfully the Hiller 250 kit seems to be working perfectly but I'm not able to use it due to this..

I'll give you one of the best tips you can get here, move away from rc bazaar and buy stuff for quads from elsewhere. There are many other stores such as Gettbs.in, rchyper.com, quadkopters.com. Check these websites out and buy your parts from there. A good charger is important, these b6ac always are bad for batteries. Check out isdt or skyrc.

Alright, certainly will check them out.. but for now I would like rcbazaar to atleast repair or replace the charger.. as it costed around 700 and it shouldn't conk off in one charge... well as for the battery, it seems to have recovered from 1.7v on cell 1 to around 3.10v.. and overall voltage is 10.4v.. is it safe to use now?
is it normal for voltage to recover like this?

To be honest. The b3ac Chargers are dirt cheap around 300-400. Not even worth 700. If you don't care about your batteries, you can use it. Also can use your battery after full charg but the cell that went below 3v will always sag before the rest.

I see this charger a good one to buy? It is not the original skyrc one.. but it seems to be the exact same. I will order this off amazon as the Same one is available there.