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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 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.
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Closed 8 years ago.
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It's well known there is the IP address (ipv4 or ipv6) and the MAC address, but does it exist another addresses?
IP address and MAC are related to Network Interfaces (Wifi interface, Ethernet ,PPP..), and PC could have many interfaces .
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Closed 9 years ago.
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In my house I have about eight walljacks with RJ45 ports for direct internet connection. A modem from my ISP is connected to a switch which supplies internet connection to those end points. On one of my end points in a central room I have installed a NetGear router. My TV and other devices are connected to the switch directly.
The question is how to force my TV or other devices to connect to the internet through the NetGear router?
Configure the TV (or other devices) with a static IP address and set the NetGear router as the Default Gateway.