94 Search results

For the term "amplifing arduino using 2n222".

Arduino 7: Switching a Heavy Load Using MOSFET and PV Sensor

Here I continue to demonstrate the versatility of the simple Arduino pot-voltmeter system. NOTE: I get scrambled when I describe the mosfet pin hookup. The Load has no connection to the mosfet gate, it…

Arduino: Ultrasonic Rangefinder Using Parallax Ping and LCD

Here’s a little Ultrasonic Ranger using the Parallax brand Ping ultrasonic transducer pair and the Parallax LCD display. Both are easy to use with the Arduino system. Just don’t try to supply more than…

Using PulseFire As A Arduino Controlled Voltage Data Logger (Demo) == PulseFire == RWGresearch

Using PulseFire As a Arduino Controlled Voltage Data Logger (Demo) first of all, i want to than welliam for his hard work!!! == PulseFire == http://open-source-energy.org/forum/showthread.php?tid=440 www.rwgresearch.com RWGresearch

Arduino: Improved Resolution Ultrasonic Ranger Using Parallax Ping Transducer

I changed the code a little bit to show the resolution of the ultrasonic ranging method used by the Arduino/Ping combination. I think that the resolution is about 1-2 mm at the distance I…

Arduino: TKLightMeter v 0.1: A Simple Irradiance Meter Using TSL235A

This little gadget is primarily for Joule Thief research, where the relative brightness of an LED must be compared or monitored as conditions change. The TSL235A is a small sensor that converts light intensity…

Arduino 14: Induction Meter using Parallax LCD and KA393 Comparator

Here’s a small and easy inductance meter made from the Arduino and some other parts. Old TVs are a great source for capacitors, diodes, and even some chips: I found this handy dual lowvoltage…

Arduino 4: TKVoltmeter, Potentiometer LED Sweep, Circuit Controller

Here I use the example sketch called “arrays” and blended it with the “potentiometer” example from the basic Arduino library with some simple modifications to serve as a potentiometer LED sweeper, which can also…