Search found 408 matches

by Deouss
Thu May 03, 2018 8:17 pm
Forum: General Discussion
Topic: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)
Replies: 35
Views: 15565

Re: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)

This device - PH meter - as I see in the output table - goes from 414.12 to -414.12 mV https://www.dfrobot.com/wiki/index.php/File:Ph-mv.jpg So knowing a bias value on input which is obviously higher that 0 or even 1V it is super easy to measure the PH just by reading analog value from gpio and conv...
by Deouss
Thu May 03, 2018 11:16 am
Forum: General Discussion
Topic: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)
Replies: 35
Views: 15565

Re: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)

It is interesting - I bought PH Tester and soon will use it here link: aliexpress.com/item/1Set-Liquid-PH-Value-Detection-Regulator-Sensor-Module-Monitoring-Control-Meter-Tester-BNC-PH-Electrode-Probe/32805675619.html Looks like a similar situation but very easy to use Check this article http://scid...
by Deouss
Thu May 03, 2018 1:16 am
Forum: General Discussion
Topic: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)
Replies: 35
Views: 15565

Re: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)

I understood he has problem with 5V because it is too high to read on esp.
Now I honestly am not sure what exactly and how is to be measured
by Deouss
Thu May 03, 2018 12:33 am
Forum: General Discussion
Topic: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)
Replies: 35
Views: 15565

Re: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)

@Deouss . . . . . You seem to be misunderstanding the requirement here. The original poster is not trying to drive a voltage. The requirement is to get digital values 0 to 1023 as if using an ADC of a 5 volt Arduino. The sensors can have outputs in the range 0V to 5V. I am replying to your posts be...
by Deouss
Wed May 02, 2018 10:49 pm
Forum: General Discussion
Topic: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)
Replies: 35
Views: 15565

Re: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)

Archibald wrote:The voltage corresponding to maximum digital value will depend on the setting of the attenuator associated with each ESP32 analogue to digital converter; it will not be 3.3V.
So just drive 3.3-logic RF mosfet at 3.9V VCC with ESP pin voltages whatever you like. What's the problem
by Deouss
Tue May 01, 2018 11:23 am
Forum: General Discussion
Topic: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)
Replies: 35
Views: 15565

Re: i want to map analog pins on 5volt between 0 to 1023 (10 bit resolution)

I want to use my esp32 to measure a water quality parameters like pH, ORP etc. by ANALOG PINS I have codes written for ARDUINO BOARD. so those codes give me output in a 10-bit resolution which is mapped between 0 to 5 volt. but in an ESP32-WROOM board by default, it gives 12-bit resolution(0 to 409...
by Deouss
Mon Apr 30, 2018 11:44 am
Forum: General Discussion
Topic: Generating PWM signal with adjustable duty cycle and frequency
Replies: 2
Views: 3988

Generating PWM signal with adjustable duty cycle and frequency

Hi, I want to control some external devices that can only be controlled using PWM signal with adjustable duty cycle and frequency. Can anyone advise what is the best way to do that and what code is most effective in that case. Is there a hardware PWM on ESP32 that does not require timer code or some...
by Deouss
Tue Apr 24, 2018 2:40 pm
Forum: General Discussion
Topic: Reflow oven mod using ESP32
Replies: 1
Views: 1209

Reflow oven mod using ESP32

Hi, I plan to design a circuit that controls SMD reflow soldering process. A regular toaster oven will be used) I do not want to use a relay switch but pure linear or proportional control based on very simple self-compensating algorithms and not necessarily complex PID formulas. What I need is good ...
by Deouss
Wed Apr 11, 2018 6:16 pm
Forum: General Discussion
Topic: ESP-PROG availability
Replies: 6
Views: 3504

Re: ESP-PROG availability

Nice! Keep us posted!
by Deouss
Wed Apr 11, 2018 6:16 pm
Forum: General Discussion
Topic: K-Type thermocouple analog detect when 30+ degrees change
Replies: 4
Views: 2332

Re: K-Type thermocouple analog detect when 30+ degrees change

You most likely use wrong sleep mode. Maybe read more about it in documentation but basically some code must check your temperature periodically without waking up the whole system. I think it is possible to power up only small rtc domains during sleep.

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