I have completed construction of an Oktokopter (my second one, both built for someone else). All seems to work well with the MikroKopter-Tool, except the buzzer makes no sound. I have checked continuity from the buzzer positive lead which is soldered to the power distribution board, through the cable up to the FltCtrl board (2.1), and that is all as it should be. The buzzer negative lead is connected with the LED strips, which all work fine.

How can I test the buzzer itself? Does it generate the buzz itself when DC voltage is applied, or is a modulated signal provided to it from the FltCtrl board?

Thanks.

Randy

show hot it soldered!
Make a photo and put it here

I have taken the photo, showing the connection of the red buzzer wire to the pad labeled BUZZ on the bottom of the power distribution board near BL Controller #8. However I don't see how to attach the photo here???

However, I have checked continuity all the way from the buzzer itself to the top of the FltCtrl board, and it checks good. I am suspicious of the diode D1 that is between pin 26 of the microprocessor and the buzzer (SPEAKER).

Randy

I have checked continuity from the buzzers red lead to the microprocessor pin 26 on the FC board at least 3 times, and checked the the buzzers black lead back to ground on the FC board. I was suspicious of diode D1, but I have bypassed it and still I have no buzzer output when I connect the battery to the Oktokopter. Everything else seems to be working fine, but I believe the buzzer is a critical error reporting mechanism, so I need to get it working. What could cause this? Is there a setting somewhere in the Tool that turns off the buzzer? Is the buzzer itself likely to be defective?

Randy

Does no one have any experience with this type of problem???

if you solder your buzzer out and connect it to 5V DC power source, is it working?
maybe you just swoped plus and minus from buzzer.

Hi Randy,
if you like,-send me your photos and i will post it for you!

Kind Regards
Andi

Andi, thanks for the offer, but I don't think the pictures will help. I have continuity all the way from the buzzer to the FC board, through the Molex cable.

MK-betatester, I did apply 5v directly to the buzzer. All I got was some scratchy sounds when I made the connection. If the buzzer should buzz when 5v is applied, then I have a defective buzzer. Is that right? If so, where can I get a replacement in the US.

Thanks!

Randy

?
in US shop of course

http://www.quadrocopter.com/Sensors-ICs_c_38.html
.

Order placed! Thank you!!

Randy