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i have a problem with arduino that stop working with gsm shield, gsm shield not even sending datas after several hours.
is there any way to auto reset arduino every 60 minutes ? with code actually. thanks before. :D
hello, i want to make a tool for dimming a light bulb 40watt - 100 watt using dimmer Triac.
but i can't find a right circuit in the internet, if you have a lot of information about that, please tell me. (i hope i can find the full blog / web about the process using dimmer triac & circuit)
i...
oh ya sorry i forgot to upload the libraries and arduino sketch,
Attached below are the libraries.
and the arduino sketch
#include "SIM900.h"
#include <SoftwareSerial.h>
#include "inetGSM.h"
#include <SHT1x.h>
#define dataPin 10
#define clockPin 11
SHT1x sht1x(dataPin, clockPin);
InetGSM...
it doesn't work.
i want to post the parameter to send it through php file.
httpPOST("http:xxx.com", 80, "/tes.php", "", msg, 50);
if i am give the value, its work,
example : httpPOST("http:xxx.com", 80, "/tes.php", "humidity=70&value=60", msg, 50);
but if i want to change the value 70 and...
i have a code for arduino that need a string with variable to redirect the value to mysql
here the example of code.
int input = sht1x.readTemperatureC();
i want to get the variable inside the string on HttpPost.
here the code
httpPOST("http:xxx.com", 80, "/tes.php", "(i want to get it...
i want to know how to control the voltage of light bulb 220V using relay ?
if i want to use 1 relay with 12V DC, that means if i give 12V DC, the light bulb is on and when 0V, the light bulb is off.
the questions :
1. if i want to create so much output to light bulb like...
helo, i have a GSM shield, i want to send the data to php, but it not work..
i use library https://www.open-electronics.org/arduino-gsm-shield/
and using POST example from this https://www.open-electronics.org/the-gsmgprs-gps-shield-some-http-connections-examples/
but it not work, here the...
if i want to make the output around 12V, i have to modify in the resistor.
but if the output around 12V, i still need to give +16V at vcc and -16v Vee ?
but is there any Vee on IC358 ? or the grounding ?
hello, i want to make an inverter amplifier,
here my circuit
Vin : 5volt
Rf : 5k
Rg : 2k
IC : LM358
if we calculate it, it should be 16.5V right ? i tested it and just 4V shown on multitester.
correct me if i wrong..
thank you..
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