Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
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Hi,
I have a knock-off saleae 16 logic analyzer hooking up to an MM5451 (datasheet: **broken link removed**). I'm driving it via the SPI pins on an arduino. Connected to the data pins of the MM5451 are the cathode pins of an RGB LED (the common anode of which is connected to +5V).
The code and...
Hello,
I am a designer working on a university project with a small understanding of technology building hence why I am turning to ask from you.
I want to create a product which is essentially a scales which measures weight and links to LED lights which will change from red to green at a range...
Hello again,
I'm working on a project to display the temperature of a thermocouple (I ordered the amplifier already) on a 3 digit 7 segment display, but I've never done it and I cant make much sense of what there is on the internet.
Ideally I would like to use an arduino mini or nano (I...
Hey guys, new to this forum and would really appreciate your help :)
I am making an alarm which will trigger a buzzer from about 30ft away and a noise which will help you find the object that you had lost.
In perspective I am making a lost and found type of device. Whilst there are similar...
It took me a while but I finally got to where these are working for me. I am programming ESP12E's and a sparkfun thing using the Arduino IDE.
My first project is a doorbell system. It uses a PIR in conjunction with the doorbell switch. I will know that the FEDEX driver did not ring the...
Hi
I hava a HundaTech 4.3" I2C TFT Display (Link Below) and want to display value read from the analog pin of my arduino DUE. The communication config i using is I2C
Has anyone successfully managed to get the display on the lcd...
After searching the internet, I got a lot of clues but no answer. Here is the answer.
The LM3915 bar / dot display driver wants an analog input up to 1.25 volts where the tenth LED comes on.
Arduino analog output is actually PWM at 5 volts, using a 5 volt supply.
This gets a smooth voltage...
So I'm playing around with this arduino project:
**broken link removed**
Basically I can take temperature and humidity readings and calculate the dew point and have them displayed on the internet using an Ethernet shield.
The problem is when I figured out how to assign the sensor/ethernet...
Hello.
I have the task of evaluate functions of C implemented libraries that will run on embedded systems. Those libraries are implemented in .h files and then included in implementations.
I was given a FFT library implemented in C that was meant to run on Arduino. In the readme file of the...
Hi guys! I'm trying to build a device to measure the electrical resistivity of a paste (cementitious materials) using Arduino Uno. Four steel probes are put inside the paste (jumper wires attached to them). Two outer probes apply AC signals (Square wave signals- Frequency 1 kHz- Voltage(peak to...
This routine is interrupt driven, and will detect either a short or long button press. It's return value is bit encoded and as such it is possible that both a long and short press can be detected. They are valid, since the press is debounced.
The code is not optimized, but written for...
Seems like a simple question, I have several PC fans (12 V, 1.35 A), all in separate loops and powered by a 12 v battery. The fans are wired to transistors being used as switches. My issue is that I don't want the transistor to supply 12 V of power, I want to immediately and always supply the...
Hi all,
This is my first post in this forum, as I'm mainly involved in Microcontrollers (PICS etc.) ... I have a requirement where I want to use an Arduino as a front end master controllers to some sort of a wireless duplex network, 'talking to' a series of battery powered mobile slaves units...
Hello,
I'm starting with this new project of mine, I am just new to this thing and I hope I'll make it work. I will be using a Pulse sensor https://www.sparkfun.com/products/11574
and it will be apply to a suit that is often used by the gym persons. And to avoid using many numbers of wires...
The objective of the NerO board is to deal with the fundamental drawbacks of the widely-used Arduino UNO R3 and, by utilizing a crowdfunding platform, get the engineering community involved right from the very beginning. Thanks to the energy efficient switching regulator incorporated into NerO...
Does anyone know how to increment or decrement the dimmer using the lm35 ? Im using this program and i dont know what can i change to do this.HELP!
int AC_LOAD = 3;// Dará o pulso no Triac pin
int dimming = 125;// Dimming level (0-128) 0 = ON, 128 = OFF
unsigned long time;//Contará o tempo...
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