Search found 25 matches

by Albert
Wed Dec 09, 2020 4:10 pm
Forum: General Discussion
Topic: ESP32 access point network prohibits client connection to any other available networks
Replies: 2
Views: 457

Re: ESP32 access point network prohibits client connection to any other available networks

This problem is experienced by not only my mobile device but also other mobile devices. i'm yet to try laptop Thanks i will try and change the wifi channel.
by Albert
Tue Dec 08, 2020 3:09 am
Forum: General Discussion
Topic: ESP32 access point network prohibits client connection to any other available networks
Replies: 2
Views: 457

ESP32 access point network prohibits client connection to any other available networks

I'm using a Node MCU devkitC v4.0 board(ESP32-WROOM-32U chip) in AP mode and hosting a webserver, which I access using my android mobile device as the client. When I try switching to a different wifi network such as my home wifi network, the mobile device will always keep trying to reconnect to the ...
by Albert
Sun Sep 20, 2020 5:44 pm
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

Hey guys, so i found out that the problem had got to do with the size of wire i was using. i was using a bredboard jumper wire which is AWG 22 or AWG 24. i changed to using another wire that is at least AWG 18 and used it to connect the output of the regulator to the 5v pin of the nodemcu(through th...
by Albert
Thu Sep 10, 2020 9:31 am
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

i figured that the pwm will work okay if the chip is powered using a specific usb cable(Anker). i tried many other usb cables but all did not work. They will all supply about 5.01v but when the chip is connected, the voltage output at the 5v regulator reduces to about 4.68v. With the Anker cable, th...
by Albert
Tue Sep 08, 2020 9:16 am
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

or could it be that the usb chip converter has to be powered in a specific way with the data pins connected in a certain way?
by Albert
Tue Sep 08, 2020 7:30 am
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

i meant laptop and not pc. the motor driver works well when it is connected to anything that has got a battery as the power supply
by Albert
Tue Sep 08, 2020 6:54 am
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

Tom, The motor driver/controller works with anything between 0 and 5v. As long as the nodemcu is powered using something that has a battery(powerbank/pc), it works well. The problem comes when battery supply to the nodemcu is eliminated. i dont understand this at all. Is there something that a batte...
by Albert
Mon Sep 07, 2020 5:56 pm
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

Tom, the pwm_1, dir_1,pwm_2,dir_2 pins are all set as outputs. When i disconnect power to the motor driver, there's no change in the voltage at the pwm outputs. in fact what has shocked me today is that when i test the circuit again, the pwm output voltage is now the same(1.92v) whether using powerb...
by Albert
Mon Sep 07, 2020 7:07 am
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

sorry i dont have a scope to see where it rises when disconnecting. im using the mdd10a motor driver and not able to attach datasheet here.
by Albert
Sun Sep 06, 2020 7:24 pm
Forum: General Discussion
Topic: Unpredictable PWM behaviour when powered via 5v pin
Replies: 20
Views: 3700

Re: Unpredictable PWM behaviour when powered via 5v pin

I added 0.1uf bypass caps on both the input and output but there's no change. The voltage measured on the 5v pin remains constant(4.56v) even when the problem occurs. ive found out that the pwm output when powered using pc or powerbank is 2.56v but when powered from the lm7805 regulator, the pwm out...

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