[Project] Voltage problem on Smoke device , need help

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Z

zerostar

Member
Hi,
i am building a smoke device,

https://www.youtube.com/watch?v=F3q4GHofWfY

and getting some trouble on the voltage problem.


The device separate into 3 part, motor, heater, battery( 4 * 1.2V rechargeable battery) .
and 3 of them is connected in parallel .


Here is the problem :

1. motor do not receive enough to run (after test, it only got 1.9V . And heater got 1.5V )

-------------------------------------------------------------------------------------------------------------------

Hi,problem had been solved,
the main reason is wire problem, after changing wire, everything become alright.

By the way, another is multi meter reading problem,

When I switch to 200mA, it showed 11.0

When switching to 20mA, it showed 0.94,

I am confused on such number...
 
Last edited:
I'm guessing the connecting wires are dropping too much voltage. Different lengths/thickness of wires will drop different amounts. What gauge wire are you using? How much current do the motor and heater draw?
 
you've put a link to a video, but what is the schematics?
do you want us to guess just looking at the mess on the table?
 
Last edited:
alec_t said:
I'm guessing the connecting wires are dropping too much voltage. Different lengths/thickness of wires will drop different amounts. What gauge wire are you using? How much current do the motor and heater draw?
Click to expand...
Opps, tell u later after checking.
 
alec_t said:
I'm guessing the connecting wires are dropping too much voltage. Different lengths/thickness of wires will drop different amounts. What gauge wire are you using? How much current do the motor and heater draw?
Click to expand...

wire : 1mm to 2mm
current (motor); 0.0019A
current (heater): 0.0017A

let me know if i do anythings wrong
 
Last edited:
current (motor); 0.0019A
current (heater): 0.0017A

let me know if i do anythings wrong
Click to expand...

I suspect that there is something wrong with your meter or your measuring technique.

With a 4.8 volt supply, those currents represent far too little power for a motor or a heater.


JimB
 
But what is the reason of voltage drop,even connected in parallel ? Is it related to wire or the temperature?
 
Battery output: 4.59V

Voltage (motor): 3.66V

Voltage (Heater): 2.95V

Current: 1.1MA
Click to expand...

This does not make any sense.
Can you post a picture of your set-up and how you are making the measurements?

JimB
 
Have you set your meter correctly for measuring DC current and DC Volts, with the probes plugged into the correct sockets on the meter (DC Amps usually uses a different socket from DC Volts)?
 
Hi,problem had been solved,
the main reason is wire problem, after changing wire, everything become alright.

By the way, another is multi meter reading problem,

When I switch to 200mA, it showed 11.0

When switching to 20mA, it showed 0.94,

I am confused on such number...
 
Your meter could be damaged if you tried measuring a current much greater than 20mA on the 20mA range
 
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