Voodoo Main Discussion

[Matt_Rowe]

not yet, i only have them setup as 3 batteries, center one is reversed, i am going to when i finish my pack, but im checking around to see if i actually need a BMS or not.
Pics attached below, i made this because i wanted a spring on the ends of neg.
But they do sell a holder from Aliexpress which would work better but i didnt want to wait, so i got 2 of these from ebay and converted them from a 4 cell to 3 cell after i found out from asking questions that 16 volts and over will fry these mds up.
And cause problems.

[SilverSurfer17]

Question for you are you using a battery management system with the 3 18650 batteries you are using i didn't realize anything inline would mess with the wave forms

[Matt_Rowe]

Because i had brand new 18650 batteries already when i checked it i ran the battery down below 15 volts with just the led for awhile before i checked it to make sure i didn't toast anything going over to 15.17 volts i can run it off of 11.1 volts if thats the problem but i dont think thats whats wrong i think when the speaker was plugged in and that coil got hot it fried something

you only need 3 18650 batteries to come up with 12.4 volts, i posted a link to you for 3 cell holder for a dollar something and free shipping from ebay
you cant run over id say 14 volts on these or you will damage things, the components arnt made for more. 14 volts is being a safe voltage, always err to safety.

[Matt_Rowe]

I've been able to finish the voodoo circuit and test it in the field
I bought the book. Installation will start when pcbs come in a week
I wondered the performance of the circuit

you said you finish the voodoo, then said you field test, then said you start when the pcbs come in,then ask about the performance of the circuit,im confused
y

[SilverSurfer17]

Im using 12 18650 batteries at 16.8 volts max charge dont know what freq on the converter i can use them with 11.1 volts without the converter ill try that and see if its right thanks for the advice

[billr]

billr stop sending me pm's you really are a annoying pest and troll, George how do I block this troll from sending pm's to me.

Perhaps I can help you with this.

[waltr]

Ok George i figured out what my dumb *** did again i keep mixing up the tx and rx channel this is the tx channel it looks way closer but still wavey ? [ATTACH]54538[/ATTACH]

That waviness looks like it could be power supply ripple.
What frequency is your DC-DC converter running at?? About 100kHz?
To measure converter frequency place the end of the scope probe near (DO NOT CONNECT) the inductor in the converter.

[SilverSurfer17]

Ok George i figured out what my dumb *** did again i keep mixing up the tx and rx channel this is the tx channel it looks way closer but still wavey ?

[SilverSurfer17]

I didn't turn the converter screw enough times i got the voltage down to 12 volts right where it shows full battery but same results

[andon80]

I've been able to finish the voodoo circuit and test it in the field
I bought the book. Installation will start when pcbs come in a week
I wondered the performance of the circuit

[andon80]

You can view them online:
https://www.gerber-viewer.com/

Thank you for your interest
Surfdetector
George

[SilverSurfer17]

Because i had brand new 18650 batteries already when i checked it i ran the battery down below 15 volts with just the led for awhile before i checked it to make sure i didn't toast anything going over to 15.17 volts i can run it off of 11.1 volts if thats the problem but i dont think thats whats wrong i think when the speaker was plugged in and that coil got hot it fried something

[Qiaozhi]

Which program should I use to view .gbr files?

You can view them online:
https://www.gerber-viewer.com/

There are several available, but I use Gerbv -> https://sourceforge.net/projects/gerbv/

[Qiaozhi]

... but is that 15.0 volts max

Yes, that's the maximum input voltage for the LT1054.
You're making things more complicated than they need to be. Why don't you use 10x NiMH AA batteries as specified?

[surfdetector]

i eliminated the 5 pin and wired it right into the pcb that inner core to positive and the ground mesh to ground and on the other end one side to one of the tx coil and the ground to the other side and have the shield and the rx disconnected and i ohmed out the cable and coil and they ohm out so its not the cable oh and i have the jig wired one end to the positive side of the coil and the other side to the ground side and nothing changes plugging in the coil or changing the resistance on the jig

Disconnect the coil. Put a damping resistor across the PL1 (TX) . Then on channel one, take your probe and connect to one side of the damping resistor and put your ground to the ground side of the resistor. For channel two attach to the TP2 Debug and trigger the scope from channel 2. This will show that the transmit is working properly. I show this in my Part #2 video.