Circuit Lake » Digital

Easy Voice Commander

admin — Sat, 04 Feb 2012 23:46:02 +0000

The purpose of the project is to build uncomplicated voice recognition system based on M32C/84 microcontroller. The main part consists of telephone, some amplifiers, and development board.The project used to operational amplifiers in the analog part, the first one, provide amplification to the signal of 220mV p-p generated by signal transducer (a microphone electret) [...]

Eight-Channel RF Remote Controller

admin — Tue, 24 Jan 2012 00:55:26 +0000

This controller was developed using Renesas SKP16C62P Starter Kit Plus. Each remote controller is controlled via RF. There are four types of generic control: general purpose timer, sprinkler timer, cooler, and heater. Each Controller may have up to 4 stations, (the Sprinkler Timer may have 8 outputs by multiplexing the outputs). Each controller’s program is [...]

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Connect External Keyboard to iPhone

admin — Thu, 01 Dec 2011 01:32:31 +0000

This project allows you to connect an external infrared keyboard to your iPhone without jailbreaking. It uses Cypress PSoC microcontroller to emulate a simple modem, and then expanded it to detect an infrared signal or read from a USB host controller, which converts this signal to FSK for transmission to an iPhone.To display the [...]

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Rechargeable Battery Capacity Tester

admin — Mon, 24 Oct 2011 03:12:53 +0000

This ATMega168-based battery tester allows you to find out the overall capacity of the rechargeable battery. It can shows how long will a battery last from the time it’s fully charged to the time that the “low battery” indicator comes on your device. It can be used to test multiple cells individually, and display the [...]

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Electric Smoker Temperature Controller

admin — Sat, 22 Oct 2011 02:15:54 +0000

Smoke-O-Tron is PID controller for electric smoker temperature developed based on PICAXE microcontroller. The controller can handle the 1500W heater to within about 3 degrees F. It will measure temperature in the space and switching the heater on and off at a given speed.User can easily adjust temperature setting through rotary encoder for user interface [...]

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Digital Caliper with RS232 Interface

admin — Wed, 28 Sep 2011 02:58:57 +0000

This project shows you how to connect inexpensive calipers, micrometers and height gauges to PC through serial RS-232 interface and see the result using PC software. Its main part consists of minimal PIC to RS-232 interface, +5V/-1.5V power from serial port, and 1.5V to 5V logic level conversion. “The connector on the measuring instrument will [...]

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Laser Position Sensor

admin — Fri, 23 Sep 2011 05:11:21 +0000

The Laser Position Sensor (LPS) module is an optical sensor that measures and provides the two-dimensional coordinates of visible red laser light (630-694nm) shined onto its surface. This Freescale MC9S08JM8CLC MCU-based project developed by Joe Grand based on Roger Johnson and Chris Lentz’s 2-D Optical Position Sensor.The Laser Position Sensor has a resolution of 0.0001″, [...]