Posts filed under 'DIY'

How to build your own heart monitoring device, a simple ECG?

How to build your own heart monitoring device, a simple ECG?

I haven’t been writing for some time and I am sorry for it. During the summer I got a three week scholarship in Germany! I had a great time there, btw. I would like to greet those people now! Finally the exams are over and I wanted to share one of my projects with you. Lately Biomedical engineering is getting more and more popular, the emerging technologies made this field change rapidly. So I gave it a try, why not? (more…)

87 comments February 2nd, 2007

How to manufacture your own PCB cheaply?

PCB of my RF Receiver

I tried to make my first professional PCB (Printed Circuit Board) and test a manufacturer for you. (more…)

31 comments April 10th, 2006

How to build your own wireless receiver and transmitter device? Use RF in your next embedded application design!

RF Wireless Project, Receiver and Transmitter (RLP TLP315 MHz) with ATMega 32

Some time has passed since I wrote something for the site but it is really not my fault. The classes have started again and as always there is a great number of assignments and homework. However, I will stop bothering you with my problems, let’s get down to work. Today you cannot see an embedded device without RF (Radio Frequency) capabilities, without the option to transfer data wireless. (more…)

235 comments March 11th, 2006

How to measure temperature with the Dallas Maxim DS1820 sensor?

LCD Temperature reading, ATMega16, DS1820 and HD44780
Sometimes we have a need to measure the temperature of a room, of an object or just maybe a terrarium; so it never gets too hot or too cold for your hamster and it warns the system to turn on a cold or hot fan (ok just a bit Sci-Fi) ;-) . (more…)

64 comments February 17th, 2006

Controlling a color graphic LCD, Epson S1D15G10 Controller, with an ATMEL AVR ATMega32L

Nokia 6100 LCD, Epson S1D15G10 Controller, with an ATMEL AVR ATMega32L
One of the visitors of e-dsp site sent me an e-mail asking me if I could create a project where we use the LCD display from a cell phone. At first I thought it was a great idea but I already ordered another graphic LCD display to play with it. However I gave it a try, I ordered the display that is used in some of the Nokia models, and I am not sure in which one. (more…)

85 comments February 14th, 2006

How to use a LCD with your electronic devices?

LCD Title, ATMEL AVR ATMega16 and LCD Seiko L2022, HD44780
Almost a month has passed since I have created the Function Generator; sorry for that, it is not my fault. I had final exams so I had to learn. Finally I have holidays, so something should be going on the site. However, let’s get to the project. Today you can rarely see an electronic device without a LCD display, even new fridges have it. It is pretty useful to know how to use some with your device. I will show you how to connect a LCD with a Microcontroller. :-) (more…)

72 comments February 14th, 2006

Why do we need Amplifiers? How to build a simple one? LM 741

Operational Amplifier LM741
You have some output source (for example an analog sensor) where the voltage is very low, just few mV (millivolts), and you would like to measure the output with your ADC (Analog to Digital converter) and with the results do some calculations with your MCU (Microcontroller) or some other device. The values the ADC gives you are all almost the same because its bit resolution is too small to show you any differences between the different states of the sensor. (more…)

39 comments February 14th, 2006


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