Tag Archives: Control

LTC4282 – High Current Hot Swap Controller with I2C Compatible Monitoring



The LTC4282 is an energy monitoring Hot Swap controller with dual MOSFET drive to enable 100A and higher current board designs. The LTC4282 ensures safe board insertion and removal from live 2.9V to 33V backplanes by controlling external N­channel MOSFETs to gently power up capacitors, avoiding sparks, connector damage and system glitches. High current hot-pluggable boards utilize parallel MOSFETs to reduce voltage drop, but all of these MOSFETs require large safe operating area (SOA) to ride through overcurrent faults. By controlling two matching current limited paths, the LTC4282 halves each path’s SOA requirements, reducing MOSFET costs in high current applications (>50A). The LTC4282 provides a rugged, compact solution for hot plugging and monitoring, especially in high power circuit boards in servers, network routers and switches, and enterprise data storage systems.

LTC4282 – High Current Hot Swap Controller with I2C Compatible Monitoring – [Link]

DIY Infrared Remote Controls


by Jason Poel Smith @ makezine.com:

Halloween is the perfect opportunity to create fun special effects. When you want to be able to control props and effects remotely, one good option is to use an infrared remote control. In this project, I’ll show you some simple remote controlled effects that you can set up in your haunted house this year.

DIY Infrared Remote Controls – [Link]

ESP8266 touchscreen WiFi light controller and clock


Spiros Papadimitriou has build a WiFi light controller and clock based on ESP8266:

A couple of months ago I picked up cheap WiFi-controlled LED bulbs (one among dozens of very similar devices), after seeing them at a friend’s place. This turned out to be an excuse to play with the ESP8266, which has inspired several hacks. I was overall very happy with these bulbs: decent Android and iOS apps and, compared to fancier solutions (e.g., Philips Hue or Belkin WeMo), they do not require any proprietary base stations, and you can’t beat the price! However, switching off the lights before falling asleep involved hunting for the phone, opening the app, and waiting for it to scan the network; not an ideal user experience. I was actually missing our old X10 alarm clock controller (remember those?), so I decided to make one from scratch, because… why not?

ESP8266 touchscreen WiFi light controller and clock – [Link]

Controlling servo motor using IR remote control

by mohamed soliman @ instructables.com:

If you are looking for comfort and controlling your electronic devices remotely, you will find your need in this instructable.

In this instructable we will learn how to control a servo motor with remote control, this will give you a general concept on how to control remotely. You should know that the remote control sends Infrared(IR) signals, so we will learn how to receive and read these signals using Arduino.

Controlling servo motor using IR remote control – [Link]

Tic-Tac TV Remote Jammer


by DangerousTim @ instructables.com:

That moment you take your eyes off the TV remote for just a second, because of which it falls into the hands of your annoying sibling. Yes, fighting for control over the TV is a daily struggle for many. But the TV Remote Jammer shown in this Instructable, will make everyone else stop dead in their tracks.

This Remote Jammer circuit, in the disguise of an inconspicuous TicTac Box, sends a constant signal to the TV receiver that interferes with the signal from the TV remote. This means that when the Jammer is on, your TV remote CANNOT be used to change channels. It practically blocks all signals from the remote.

Tic-Tac TV Remote Jammer – [Link]

More awesome DoorBell control


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


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


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


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]