Category Archives: Arduino


Programmable lithium battery charger shield

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Electro-Labs has posted a new project about making a programmable lithium battery charger shield for Arduino. The shield schematic and printed circuit board are designed using the SoloPCB tools, a Windows-based PCB designing tool from FabStream. The charger shield consists of a Nokia 5110 LCD and four tact switches for user interface, which allows users to program the charging voltage and current. Their design also features the ability to monitor the battery status before and during charge. The circuit is based on LT1510 Constant Current/Constant Voltage Battery charger IC from Linear Technology. LT1510 uses the PCB ground plane as heat sink

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Mooltipass: An offline password keeper

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In today’s digital world, password management has become an indispensable and challenging part of our lives. No matter is it our online banking, social media, email, restaurant, utilities, or remote server account, every web-interaction these days requires you to create a strong, non-repetitive, and frequently-changed  password to login to the system. With growing number of online accounts and their strong password policies, keeping track of the passwords is getting annoying and harder. Choosing the same password for multiple accounts puts your entire online identity at risk if that password is compromised. To address this password problem, Hackaday introduces a new

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Mobile Sun-seeker for indoor planters

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Indoor plants are great for adding some greenery to home interior decoration. Most of the time low-lighting conditions can sustain indoor plants. However, it is still important that they get proper sunlight for healthy and greenish growth. If you have windows in more than one direction of your house, it is possible that the sunniest spot inside your house is not always the same during the course of day. This mobile sun-seeker robot helps to navigate the interior plants to enjoy the sunniest spot in the house. The mobile sun-seeker uses two continuous rotation servos to move around and are

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Arduino pin monitor shield

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Carsten Tonn-Petersen has designed this Arduino pin monitor and tester shield to assist his prototyping work with Arduino. The key features of this shield is it provides one LED for every single I/O pin and can be used with Arduino Uno, Leonardo, Mega, Due, and Mini. The shield also features one tact switch and one toggle switch for digital inputs along with two potentiometers for simulating analog input voltages during prototyping. The complete list of features as Carsten has mentioned about his Arduino pin monitor and tester shield are listed below: One LED for every single input or output Can be used

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Capacitive touch sensing demo

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Capacitive touch sensing allows to provide digital inputs with a simple touching of electrodes. In Arduino, the capacitiveSensor library can be used to convert two or more of its I/O pins into a capacitive sensor. This technique requires external resistors and metal foils to work properly. This Instructable describes a physical setup for making five capacitive touch sensors with the Arduino I/O pins.  

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