Circuit Lake

Arduino Lightweight Two Wheel Balancer Robot

admin — Wed, 22 May 2013 03:59:04 +0000

VertiBOT is lightweight balancing robot based on Arduino Nano. This educational project was built to investigate and understand sensor fusion using kalman and complementary filter algorithm and PID control in an unstable system. VertiBOT is an inverted pendulum platform that remains balanced by means of two tiny motors, located in the bottom of the structure. [...]

Completely Auto-Shutoff Circuit, ATtiny85

admin — Thu, 02 May 2013 01:07:26 +0000

Auto power off is must have feature for battery powered device to help extend battery life. These days, many modern battery powered devices has an automatic power off function. But, if you have battery driven device with no auto-shutoff you can add auto power off using simple circuit designed by Kyle Wengenroth below. This project [...]

Liquid Supply Controller

admin — Mon, 08 Apr 2013 01:23:24 +0000

This liquid controller project can be used to measure & supply exact amount of liquid like water, petrol, kerosene, juice, cold-drinks etc. It uses simple set up for the hardware – an AT89S52 Atmel microcontroller, motor relay, 16×2 LCD and three buttons for input. The system uses time value rather debit counter to measure and [...]

555 Fully Automatic Emergency Light

admin — Sat, 06 Apr 2013 01:10:29 +0000

This circuit shows you how to build simple Automatic Emergency Light using IC 555. This emergency light automatically turns on when mains fails and turn off when mains power is available. Its charging circuit stops automatically when the battery is fully charged. So you can leave the emergency light connected to AC mains overnight without [...]

MSP430 Brushless DC Motor ESC

admin — Fri, 05 Apr 2013 01:47:16 +0000

The aim of the project is to build Electronic speed control (ESC) booster pack for the MSP430 LaunchPad named as BLDC Booster. It allows for sensored or sensorless control of a brushless DC motor. Project scheme for sensorless commutation is using BEMF integration and flux thresholding based on the theory of operation for TI’s InstaSpin [...]

ATtiny2313 Frequency Meter

admin — Thu, 04 Apr 2013 01:25:48 +0000

The project shows you how to build simple and powerful frequency meter using ATtiny2313 microcontroller. The frequency meter can be used to measure frequencies from 1Hz to 10MHz (9,999,999 Hz) with a resolution of 1 Hz over the entire range. It displays result on seven 7-segment LED displays. The project uses 22.1184MHz overclocking crystal to [...]

Adjustable Dummy Load, RE:LOAD

admin — Wed, 03 Apr 2013 02:00:55 +0000

Re:load is low cost adjustable constant-current load with self-powered (passive). The circuit is simple and easy to build. It uses BTS117 FET as main pass element. The FET has built in ESD, overcurrent, overvoltage, and over temperature protection, making them ideally suited for a dummy load. MCP6002 op-amp is used in this project because it [...]