Famous Circuits Blog

Trossen Robotics Blog

Posted: 11 Feb 2013 08:43 AM PST

We’ve been busy the last few months perfecting our new line of RobotGeek I/O boards, and they’re finally ready for the debut! We do a lot of rapid prototyping, and we’ve seen our fair share of I/O boards and shields – but none of them have been exactly what we needed. So we finally decided to make our own!

These boards use a standard 2.54mm(.1″) pitch 3-pin connector – just like a standard hobby servo. This makes these I/O boards compatible with standard 3-Pin cables and breaboards. You can even use a Squid Cable to hook a board directly to your Arduino! Also like hobby servos, our boards use a standard ground-voltage-signal pinout, making them compatible with a wide variety of sensor shields and interface boards.

Digital Input

Out basic Pushbutton is great for any project that needs a simple digital input. For basic orientation sensing, we also have the RobotGeek Tilt Sensor. This board has multiple output ports for the tilt sensor, making it easy to mount in any project.

Digital Output

Our RobotGeek Buzzer is a great way to add basic audio to your project – just send it a ‘High’ signal, and you’ll get a tone. The RobotGeek LED driver is a great way to drive an LED without having to worry about drawing too much power directly from your Arduino’s output pin. Like the tilt sensor, we’ve designed this board so you can mount the LED horizontally or vertically. Our final digital output board, the RobotGeek Relay is a great way to control motors, solenoids, and more easily from your Arduino.

Analog Input

The RobotGeek Slider and Rotation Knob are great boards for any project that needs fine analog control. And if you need two potentiometers on one board, try the RobotGeek Joystick. Finally, the RobotGeek Voltage Divider will take any standard variable resistor (like out Force-Sensing Resistors) and create a microcontroller ready signal for you to use.

Stay tuned for more sensors and our RobotGeek Sensor shield!

IEEE Spectrum

Who After Chu?

Posted: 11 Feb 2013 07:44 AM PST

Will a new energy secretary focus more on areas neglected in Chu's farewell appraisal?

Floating Robotic Shipping Containers Team Up to Create Islands and Runways

Posted: 11 Feb 2013 07:42 AM PST

DARPA wants swarms of modular robotic boats to form structures on water

IEEE Spectrum

U.S. Northeast Sets Ambitious Carbon Reduction Goals
This Week in Cybercrime: Former State Government Employee Used Driver’s License Database Access to Snoop on Thousands
UK to Build Advanced Metrology Laboratory
What Comes After the Cloud? How About the Fog?

U.S. Northeast Sets Ambitious Carbon Reduction Goals

Posted: 09 Feb 2013 08:53 AM PST

New targets reflects RGGI's own success and general U.S. progress

This Week in Cybercrime: Former State Government Employee Used Driver’s License Database Access to Snoop on Thousands

Posted: 08 Feb 2013 02:10 PM PST

Plus: An industrial control system vulnerability puts thousands of high-profile organizations at risk; cyberthieves go old school; and Adobe releases an emergency patch for its Flash player

UK to Build Advanced Metrology Laboratory

Posted: 08 Feb 2013 02:07 PM PST

£25 million expansion of National Physical Laboratory is part of a £600 million technology

What Comes After the Cloud? How About the Fog?

Posted: 08 Feb 2013 01:36 PM PST

Startup Symform says its shredded, distributed cloud is more resistant to natural disasters than traditional computing clouds.

RobotShop Feeds

Don’t Be a Square! Get a Cube 3D Printer

Posted: 08 Feb 2013 12:16 PM PST

Cube 3D Printer

RobotShop now carries the Cube 3D printer from 3D Systems. This is a very friendly 3D printer that allows you to make colourful objects quite easily thanks to several web applications 3D Systems puts at the disposal of the printer owner. See the samples of the things you could do with this printer in the video below.

Of course, you can also create your own 3D models and print them as well in your choice of PLA or ABS plastic. Since this is probably the most user-friendly printer we carry, we are really eager to see what our customers will be printing with this nifty machine and what crazy robots will ensue.

What would make first if you had this 3D printer? Tell us in the comments blog and do not forget to pick up yours soon.

Circuit Project Electronic www.eleccircuit.com

12 volts switching power supply using transistor

Posted: 08 Feb 2013 10:55 PM PST

One of my friends asked. Can we build the switching dc power supply circuit with 2 transistor? The applications IC that Sometimes is difficult. A some number IC is hard to find. and very expensive. When considering Applications for some time. We do not need to use a high current. and have sufficient space to install circuits. The selection use the transistors. Therefore as an alternative to saving, and extremely value for money. How it works In Figure 1 it is design of the switching regulator, which is a step down dc converter converts the voltage from 15-20 volts to a voltage of 12 volts. The important components is T1 act as switching and has a common components The main are L1, D1 transistors, NPN+PNP Acted to feed back to each other. Increased frequency generators or to Makes the switch to run continuously. Only in this circuit of coil is [...]

12 volt DC motor speed controller with pulse

Posted: 08 Feb 2013 08:42 AM PST

Usual, we just enter the voltage and DC current source to the DC motor, Makes motor can be rotated. If will modify or regulate the speed in rotation of the motor. Wewill need to enter the voltage look into pulses or periodically. Which will makes the average voltage at output is different. By the pulse voltage is high frequency will has the average voltage than the low frequency pulse. The same with the pulse has over duty cycle value, it will has the average pressure much than low duty cycle value. The working principle. The average voltage will be supplied to the DC motor. To control the motor rotation is slow or fast. This circuit uses the above principle. By makes the pulse generator circuit or astable multivibrator Which consists of IC1 / 1 and IC1 / 2 inverter gate with C1, R1, R2, VR1 and diode D1, D2. The [...]

IEEE Spectrum

Amazon Coins: Jeff Bezos's 2013 Stimulus Bill For Kindle Fire App Developers
Nanoclast Q&A: Eric Mayes, CEO, Endomagnetics
Would You Trust a Website With Your Paycheck?
Video Friday: Exploding Soft Robots, Chatbot Movie Scripts, and Quadrotor Demos
Surface Plasmon Resonance Spectrometer Crosses Scale Boundaries
U.S. Greenhouse Gas Emissions at Eighteen-Year Low
Nanoscale Chip Design Enables Future 'Internet of Things'

Amazon Coins: Jeff Bezos's 2013 Stimulus Bill For Kindle Fire App Developers

Posted: 08 Feb 2013 08:57 AM PST

Amazon Coins is a worn out, useless idea for customers. But Kindle Fire app developers could profit big time.

Nanoclast Q&A: Eric Mayes, CEO, Endomagnetics

Posted: 08 Feb 2013 08:57 AM PST

One of nanotechnology's commerical pioneers talks about his new venture and the challenges of innovation for emerging technology

Would You Trust a Website With Your Paycheck?

Posted: 08 Feb 2013 07:28 AM PST

Simple.com does much of what a bank does, without bricks, mortar, or fees

Video Friday: Exploding Soft Robots, Chatbot Movie Scripts, and Quadrotor Demos

Posted: 08 Feb 2013 07:19 AM PST

How do you instantly make a robot more awesome? Explosives. And there's more, it's Video Friday

Surface Plasmon Resonance Spectrometer Crosses Scale Boundaries

Posted: 07 Feb 2013 02:05 PM PST

Nanoholes have to be smaller than the wavelength; diffraction gratings have to be bigger. This spectrometer has it both ways.

U.S. Greenhouse Gas Emissions at Eighteen-Year Low

Posted: 07 Feb 2013 01:07 PM PST

They are nearing their 1990 level, the baseline for Kyoto Protocol reductions

Nanoscale Chip Design Enables Future 'Internet of Things'

Posted: 07 Feb 2013 12:30 PM PST

New chip design on the nano scale reduces energy consumption on chips and work off photovoltaics so batteries last forever

Circuit Project Electronic www.eleccircuit.com

Sun light control automatically using SCR

Posted: 07 Feb 2013 04:53 AM PST

This circuit controls the turn the power off consumption in home automation. If it is daytime working to break the circuit. But at night is connected to a working electrical AC 220 volts. Such as the opening and closing of the bulb. This lamp will illuminate when the light bulb goes off into the evening and on beginning to dawn. How circuit works The circuits ready working. When the male plug, or for the circuit to the AC line power at 220 volts. The plug socket is connected to appliances in the home. Or connect with bulbs. The circuit is based on the brightness of the light incident on the LDR. By the features is as follows. When LDR received an indirect light. It will have a low resistance causes a current flow through too much or through to a ground fully. Makes a capacitor C1 look like short circuit. [...]

Digital Input

Digital Output

Analog Input

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