Tag Archives: Control

More awesome DoorBell control

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Felix of LowPowerLab posted an update on his DoorBell Mote project:

My first DoorBell Mote prototype was working nicely and it allowed monitoring the door bell (while also triggering it remotely – toddlers love it). But I wanted more. On weekends the family likes to get a well deserved nap during the day and often those pesky solicitors ring the bell and wake everyone up. So naturally the doorbell has to be disabled also, without major effort or any disconnected wires. Sounds like the perfect addition to the Door Bell Mote. So I made a new revision and a proper PCB for this, below is the schematic with the changes and the proto PCB from OSHPark. Actually I made more changes to the schematic after putting together the PCB, so there are some differences. I’ve tried a LTV814H optocoupler for AC detection instead of the more expensive H11AA11, it works just as well, but both can be used on this PCB

More awesome DoorBell control – [Link]

Unipolar 4-Phase Stepper Motor Controller

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Unipolar 4-Phase Stepper Motor Controller Board will help you control a Stepper Motor or 4 individual Solenoids. This circuit consisting of transistors that serve as current amplifier and also diode to prevent damaging back EMF, circuit uses Darlington transistors to provide high current capacity to unipolar stepper motor. Just provide sequence of pulse using Micro-Controller or descript circuit to roll out the unipolar motor. On board High Watt resistor to control the current, value of the resistor can be set as per your load current requirement.

Unipolar 4-Phase Stepper Motor Controller – [Link]

BLDC Motor Control using Digital Signal Controllers

The usage of BLDC motor is already increasing due to its efficiency in driving motors with lesser power requirement. It runs with a digital signal controller IC that has processing power of a 32-bit DSP and a functionality of the microcontroller with a flexible set of peripherals. Due this flexibility in configuration, the designed system will be able to optimize its functionality. The instruction set is highly efficient for C compilers that enable rapid development of optimized control applications.

The design is comprised of a MC56F82313VLC digital signal controller that serves as the direct controller of the system. It sends the pwm signal to the Insulated-Gate Bipolar Transistors (IGBTs) in which the IGBT provides the very efficient switching to drive the BLDC motor. The IGBTs provides low switching loss and improved protection characteristics for simpler electrical and mechanical construction of the design. The host controller it enables the universal control of the motor.

The design is applicable to computer fans and some industrial motor control. This will also provide an opportunity to motor applications to have a very efficient digital signal control that brings less power consumption feature to the entire system.

BLDC Motor Control using Digital Signal Controllers – [Link]

UC3844 base motor speed controller

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Dilshan Jayakody writes:

UC3844 is popular current mode controller which is commonly found on DC-to-DC converter circuits and switch mode power supplies. This motor speed controller is also based on UC3844 and it is specifically design to drive 20V – 24V DC motors.

In this given configuration UC3844 produces (approx.) 50kHz to 240kHz PWM output and this range can be adjust by changing the value of C2 timing capacitor. As per the datasheet UC3844 is capable to produce PWM output frequency up to 1MHz.

UC3844 base motor speed controller – [Link]

Nuimo: Seamless Smart Home Interface

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Nuimo is a universal controller for the internet of things. Control your music, lights, locks and more.

Nuimo is an intuitive and natural way to interact with your connected devices. Nuimo works with any bluetooth device or application including Sonos and Philips Hue.

Nuimo is a freely programmable controller and wireless so you can take it anywhere. Using the nuimo you can control all of your devices through our simple and seamless physical controller.

Unlike the touch screen, nuimo has a number of touch based inputs that feel familiar and suit your needs. It incorporates capacitive touch, gesture recognition and a 360 degree analog ring that gives you precise control over everything from the volume of your music to switching off your lights. These inputs are easily mappable to the devices and applications you care about most.

Nuimo: Seamless Smart Home Interface – [Link]

Oktopod: Dev Kit for Your Robo-ideas!

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Oktopod Studio – Development Tools for Mechatronics, Robotics and Automation.

Oktopod Studio is a development platform for mechatronics, robotics and automation, which enables creating and controlling low voltage electronic devices, models and home applications /in an extremely simple way/.

Oktopod_Board presents a Programmable Logic Controller (PLC), which features plug and play inputs and outputs for connecting low voltage electronic devices, like: LED lights, DC & servo motors, electromagnets, switches, photo, temperature and magnetic sensors, and so on.

Oktopod: Dev Kit for Your Robo-ideas! – [Link]

RoomMote – Control the color and sockets of your Room

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by rohitg.in:

Buzz..Buzzzz..buzzzzzzzz .. That is how a lone mosquito irritates you in the middle of the night trying to convince you that his lullaby is helpful. Insignificant or not, But truly that is the underlying inspiration for this project. The Mosquito repellents have this obnoxious smell that I would not like to sleep in and these loner mosquitoes who just piss me off by buzzing in the ear, you have to choose a lesser evil. Obviously, I turned ON the repellent and in a while it goes off but the smell starts building up and I am too lazy to turn it back OFF, leaving the warmed blanket on a chilly Delhi December Night. The nocturnal dilemma .

RoomMote – Control the color and sockets of your Room – [Link]

Motor Control using TI AMC1200

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This schematic shows the TI AMC1200 in a motor control application.  The motor phase current is measured at the resistor (RSHUNT), and the signal is processed through an RC filter before reaching the AMC1200.  Also shown are optional protection capacitors C3 and C4.  The TI AMC1200 get its high side power from the power supply of the upper gate driver, and a 5.1V zener diode regulates the voltage.  The high transient immunity of the AMC1200 and AMC1200B ensures reliable and accurate operation even in high-noise environments such as the power stages of the motor drives.

Motor Control using TI AMC1200 – [Link]

Sleep easy with this desk fan speed reducer

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by Michael Whybray:

Most desk fans I have come across have three speeds: Full Speed, Almost Full Speed, and Off – useless if you want just a gentle air movement, and far too noisy if you are trying to get to sleep (in your bedroom of course, not at your work desk!). The squirrel cage induction motors they use have switches to two or more windings – and possibly a capacitor – to reduce the drive current. But unless the drive frequency is also reduced, the torque and speed stability are poor, so minimal speed reduction is usually available on these fans. Using a triac to provide phase control of the voltage works poorly for the same reason, with the speed very sensitive to the triac firing phase angle and fan load, and has a tendency to stall.

Sleep easy with this desk fan speed reducer – [Link]

Microcontroller based running light controller

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This project provides some lighting effect by the blinking pattern of the bulbs connected at its output. Up to 8 Bulbs can be connected in between connector CN2 to CN9 and AC power to control them should be connected at Connector CN10. DC Power should be applied at Connector CN11 in accordance with the polarity marked on this connector. Care should be taken while using this it as it contains Main Power on the board.

Microcontroller based running light controller – [Link]