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Pocket LED Microscope

Enhance Your Pocket LED Microscope

T.K. Hareendran - 08/05/15

This eBay item, sold under different names, is a very useful accessory for electronics hobbyists. The gizmo is [...]
arduino rain sensor

Arduino & Rain Sensor Experiment

T.K. Hareendran - 08/03/15

The experiment is for switching an acoustic sounder as a rain alarm after a predetermine time. It may, [...]
Motorcycle Battery Level Indicator

Motorcycle Battery Level Indicator

Jim Keith - 03/24/15

This battery level indicator offers (2) incandescent lamps that light up progressively as the voltage increases. It is [...]
Linear DC Signal Opto Isolator Schematic

Linear DC Signal Opto Isolator

Jim Keith - 03/21/15

This simple circuit provides better than 1% accuracy in optically coupling a DC voltage signal. To compensate for [...]

Digital Potentiometer Arduino Shield

Enrico Miglino - 03/14/15

One step ahead: in this article we will review the project for an Arduino shield compatible with Arduino [...]
arduino rfid security system board

Arduino RFID Reader RC522 + Access Control System

P. Marian - 02/18/15

I just received my RC522 RFID reader and made this simple Arduino access control system that uses the [...]

Arduino DHT22 (AM2302) Tutorial + Library

P. Marian - 02/17/15

You can use the DHT22 (or AM2302) humidity/temperature sensor and the Arduino UNO board to read data and [...]
Arduino daisy chain 7 segment leds

Multiple Shift-out Registers on Arduino – part 2

Enrico Miglino - 02/11/15

In this second article we will see a practical application of the daisy-chained shift registers. We want to [...]
arduino 7 segment daisy chained

Multiple Shift-out Registers on Arduino – part 1

Enrico Miglino - 02/09/15

Shift-out: again? Yes, shift-out registers again, now daisy-chained! But let me write down a short foreword. As probably [...]
LCD-Alpha 5

Alphanumeric LCD with Shift Register on Arduino – part 2

Enrico Miglino - 01/28/15

As promised in the first part of this article, now it is time to see in detail how [...]
alphanumeric lcd arduino

Alphanumeric LCD with Shift Register on Arduino – part 1

Enrico Miglino - 01/22/15

One of the limitations of the small 8 bit microcontrollers like the Atmel ATMega family adopted by the [...]
36V Battery Level Indicator circuit

36V Battery Level Indicator

Jim Keith - 01/12/15

This battery level indicator offers (5) LEDs that light up progressively as the battery voltage increases. This is [...]
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