Hi am new to using Arduino Uno and esp- 01, am trying to control 3.7v coreless Motor for my Quadcopter , the problem is, for testing I connected my Arduino Uno with esp01 module I made appropriate connections, I used remote xy for connecting to the wifi, pin number 11 from Arduino is connected to the base of a bc547 transistor, for the collector I have a 5v supply from the Arduino Uno board that is connected to my laptop( it is to be noted that all the power is coming from my laptop) and the emitter is connected to the positive terminal of the coreless Motor(am giving the motor a approx 5V supply because when am giving it a 3.7V its speed isn't sufficient) the negative terminal of the coreless Motor is connected to the ground of the Arduino, I gave the esp01 a 3.3v supply from the Arduino, I installed the remote xy app and connected it to the wifi then... When I on the button from my phone there is a small rotation in the coreless Motor and then the wifi disconnects , this happens multiple times I don't know how to fix it 
... Can anyone pls explain
have a read of how-to-get-the-best-out-of-this-forum
e.g.
- post you code using code tags - select < CODE/ > and paste the text where it says
type or paste code here
- upload a schematic of the wiring in particular showing power supplies
- upload any serial monitor output (as text not a screen image)
Most Uno's have pretty minimal power available at the 3.3v pin, and maybe not enough for the ESP-01.
Then should I give an external power supply?
When I touched the esp01 it was pretty hot does it have something to do with it?
This
https://www.esp8266.com/viewtopic.php?t=12192
suggests that is a definite yes.
The above, and the fact that the ultimate source of that heat is Uno's 3.3v pin means yes. I believe those eBay 3.3v regulators for about $2 will do the job.
You may find that, if your WiFi transmissions are momentary, a fat capacitor on the supply can fix the problem.
maybe simpler to dump the UNO+ESP01 and move to an ESP32
one microcontroller to program and no complexity of UNO <> ESP01 communication
I have to use esp01 because for my Quadcopter esp32 would be heavy, after testing I would pair my esp01 with Arduino pro mini
There is more than one Pro Mini but I guess they are all short on 3.3v. I am working on a project that runs an ESP-01 and a ProMini off a single 18650 using individual regulators for each. They are the ones at the bottom of the picture in
Ebay 192193961591
I have an ESP32 Vroom, and I can't tell the difference in weight between that and a ProMini BTE13 plus an ESP-01. If you really have a weight problem, it is probably somewhere else.
I believe there are ESP boards smaller, cheaper, and, I guess, lighter than the Vroom.
esp32 is much much smaller that wroom it hardly weighs a gram
[quote="diamond_bucket, post:8, topic:1263235"]
it hardly weighs a gram
[/quote
So the actual problem is.........?
Ah sorry not esp 32 , Arduino pro mini is much much smaller than wroom it hardly weighs 2 gram
The actual problem is when the esp module transmits the signal to control the motor( the motor takes 5V) the motor runs for 3 seconds or so and wifi disconnects.. I have ordered the battery you have mentioned above...I ll get it by tomorrow..I'll update to you once I have tried with it
Thankyou for helping me out!!!!
I used a 18650 and still it's disconnecting often idk why💀
Properly charged 18650?
Correct voltages delivered as required?
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