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Closed 5 days ago.
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I wanted to change my Arduino UNO atmega328p to atmega8 so I could program my atmega8 and use it on other boards which is cheaper for my projects. I used optiloader to make my atmega8 be able to bootload (with a circuit), but when I connect my atmega8 to my Arduino UNO I can't upload code on it. it gives me this error:
vrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xe8
Also, I have put my board on Arduino UNO and the port is showing it and I have set my programmer on "ArduinoISP". I can't understand what the problem is.
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Closed 2 days ago.
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I want to connect three 12V pc fans and a 5V water pump to an Arduino Uno , how many relay modules would I need and how do the relay modules work...??
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Closed 8 days ago.
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I have recently bought an OLED SSD1306 Monochrome (White) display. I wanted to connect this display to my Nodemcu ESP32 board, but nothing seems to work. I used the Pinout sheet of my board to connect the display correctly. I checked my wiring multiple times but nothing seems wrong. I thought that the problem might be from my I2C address. I tried the I2C scanner but it doesn't return me any address. I need your help! Since no tutorials exist for the Nodemcu ESP32 connection to the OLED SSD1306 display, I would appreciate any help with the wiring and the code.
PS: I am a rookie so forgive me if I made any newbie mistake!
*I have the Nodemcu version of ESP32 which Not ESP32
the screen did not turn on at all
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Closed 7 days ago.
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I have made a project using an Arduino Mega 2560.
It works only with both the USB and the 12v battery attached.
Included in the project are 3 relays, 1 pump, and 2 servos.
The relays and pump run off of the 12V battery directly (after the power switch).
The servos are 4.8V-6.8V, and I am using a voltage regulator set at 5.5v.
No power is being sent from the Mega board for components.
The only wiring to the Mega is to the Vin at 12v from a CA1270 battery.
During research, it seems that the issue could be a lack of amp delivery, but the battery used is for a kid jeep, so I am sure it has the delivery.
I am using power busses for distribution and grounds, so I am confident of grounds and power supply (especially since it runs with the USB).
What could cause this to happen?
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Closed 1 year ago.
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I'm new in the arduino community, I spent a lot of days to get up with my gsm sim900A module, but it seems not working it keeps blinking 1 sec, so the sim not registered to the network or something like that, I wonder if anybody has the same problem of me, but I really need help with that.
Thank you
According to blog by Erfinden
Steps :
Insert sim and lock it.
Connect the adapter and power it
Now wait for some time (say 1 minute) and see the blinking rate of ‘status LED’ (GSM module will take some time to establish connection with mobile network)
Once the connection is established successfully, the status LED will blink continuously every 3 seconds.
So just blinking an LED doesn't meant that your GSM is not working, it is how it works.
GSM Module sim900a is working over 5v. try to power it up from an external source don't use arduino for voltage supply
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Closed 6 years ago.
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I could not select the serial port in my Arduino IDE. It is greyed out even if I connect my USB to serial cable. What is the proper driver for that and where I can find that?
The driver for PL2303HX in Mac is here and in windows is here, which you most probably need. If you need the driver for CP210x USB to UART Bridge VCP (virtual com port), it is here.