Saturday, March 28, 2015

Circuit Schematic Project Tiny DDS - Open Source DDS Generator

Robometricschool. - Here is Circuit Schematic Tiny DDS - Open Source DDS Generator like in figure 1 below. This project is an open source (hardware & software) DDS generator, based on: smart TFT module, AD9834, LM7171 fast amplifier.

Circuit Schematic

Figure 1. Circuit Schematic Project Tiny DDS - Open Source DDS Generator


The homemade function generator is a quite common project on the internet. We can find different ways to do it:

  1. The quick & dirty way based on a DDS module bought on eBay
  2. The analog version based on a MAX038 / XR2206
  3. The “clean” way based on a FPGA and a fast DAC (e.g.
  4. The software way (e.g. Arduino + R/2R DAC)

From my side, I wanted a small one which could fits my needs without being too expensive. According to me, such generator should at least:

  1. Be easy to use
  2. Output a signal from 1Vpp to 10Vpp (+/-5V), from 0 to 1MHz
  3. Have a low profile
  4. Without electric hazard (shall work on a 12V DC)

Friday, March 27, 2015

Free Download Smarter Battery Version 4.0 for Windows

Robometricschool. - Here is software Smarter Battery. Smarter Battery 4.0 analyzes and displays your battery's wear level, discharge cycle, and other important parameters, constantly updating its predictions of how much charge remains and sounding alarms at critical points. Its attractive interface includes a Calibration feature for new batteries, as well as Fast Discharge and Green modes. Smarter Battery 4.0 supports up to four batteries and is free to try with a 10-use, 15-minute limit.

Figure 1. Screenshot
(Source: CNET)


From Microsys:
A battery monitoring utility for portable computers, intended to provide you with all the battery data, to help prolong its life and save its energy. It shows you the evolution of the battery's capacity during the charge / discharge cycles and computes a few important battery parameters, such as the Wear level and Discharge Cycles count. It features a new battery Calibration, Fast Discharge and Green mode functions. This program continuously reads the battery data, making a prediction for the time remaining. Two alarms, for low / critical battery capacity, can be triggered by either values of time remaining or capacity percentage you set. The battery capacity evolution can be graphically displayed for up to 16 hours period of time, so a complete charge or discharge cycle can easily be visualized and analyzed. Both calibration and fast discharge procedures were updated to perform better on Windows 8 laptops or tablets. A battery gadget, with many format options, is displayed by this utility and offers you a fast, clear view to the current battery state. The Power Plan selection is included in its menu, along with Shut down, Standby, Restart, Hibernate commands. A must have, inexpensive, easy to use utility that allows to maximize your battery life and performance.

What's new in this version:

Up to four batteries can be registered at a time


Please download free Smarter Battery Version 4.0 for Windows using link below from external server.

Wednesday, March 25, 2015

Circuit Multicolor Flashing LED Globe using 555 IC

Robometricschool. - Here is Circuit Multicolor Flashing LED Globe using 555 IC like in figure 1 below. The main component of this circuit is LM555 with output to LD3 and LD2. Here is an ultrasimple circuit of an LED Globe wired around the evergreen timer chip IC 555. One advantage of this LED Globe is that it is a voltage-controllable flashing device, ready to work together with any microcontroller chip. This allows you to control the light pattern to a certain extent in tune with the output signal from an external microcontroller, too.

Circuit Schematic

Figure 1. Circuit Multicolor Flashing LED Globe using 555 IC
(Source: electroschematics)


Circuit schematic like in figure 1 above is Circuit Multicolor Flashing LED Globe using 555 IC. Nothing new, here the 555IC (IC1-LM555) is wired as a monostable multivibrator (MMV) working on regulated DC5V supply. RC components R2(1K) and C2 (100uF) sets the monotime period. At the front end of the circuit, one single-color flashing LED (LED1-5mm Red) is connected across the power rail through a current limiting resistor (R1-1K). The pulse output available from this LED is directly fed to the trigger input (pin 2) of the 555 IC. The control voltage is driven to the control voltage terminal (pin 5) of IC1 through a resistor (R4-1K). For normal use, the control voltage can be generated from a 10K multi-turn potentiometer (P1-10K) as shown in the circuit diagram. Actually, any kind of DC voltage level generator can be used to control this circuit. It could come from a photoresistor voltage divider, sound to voltage converter,from a microcontroller,etc etc. The IC1 output (from pin 3) is then extended to two 5mm multi-color flashing LEDs (LED2&LED3) through a single current limiting resistor (R3-47R).

Article source: "Crazy Multicolor Flashing LED Globe!"

Saturday, March 21, 2015

Free Download Digital Works 3.04

Robometricschool. - Here is one circuit schematic design software freely. This software is Digital Works 3.04. In here we will give you global information about Digital Works 3.04 and then we will give you link to take free download Digital Works 3.04 from external server.



Digital Works 3.04 is a graphical design tool that enables you to construct digital logic circuits and to analyse their behaviour through real time simulation. Its intuitive, easy to use interface makes it the ideal choice for learning or teaching digital electronics.


And now we will give you link to take free download Digital Works 3.04 from external server. So, please click link below to download this software.

Wednesday, March 18, 2015

Simple Circuit Unijunction Transistor Flasher

Robometricschool. - Here is very simple circuit for Unijunction Transistor Flasher using 2N4871 like in figure 1 below. Using the rather dated 2N4871 unijunction transistor it is possible to make a simple, but very bright, daylight visible LED flasher. This is a good project for the beginner and will enable the experimenter to get a basic understanding of unijunction transistor operation. Numerous unijunction transistors are available and they all work about the same.

Circuit Schematic
Figure 1. Simple Circuit Unijunction Transistor Flasher
(Source: electroschematics)


Circuit schematic like in figure 1 above is Simple Circuit Unijunction Transistor Flasher. The Operation is very simple –C1 charges via R1 & R2. When the voltage across C1 exceeds Vcc x the intrinsic standoff ratio (a fancy name for about 2/3 Vcc), the unijunction fires and discharges C1 though the LED. Per the oscillograph, the peak LED current is about 50mA when Vcc = 12V, or 70mA when Vcc = 24V. Under ideal conditions, the 2N4871 is rated for a peak discharge current of 1.5A, but the LED is rated for only 100mA –the dynamic resistance of the LED at 100mA is approximately 20Ω and this is what ultimately limits the LED current. The 1Ω resistor is a shunt for monitoring LED current –it is not required for circuit operation.

One of the specifications for the unijunction transistor is the valley current. In this case it ranges from about to 4mA (min) to 7mA (typ) to (no maximum indicated) –very sloppy spec. If R2 is adjusted too low, the unijunction transistor will not reset itself and the LED will light continuously –try it to see what happens. R4 is not absolutely necessary, but it tends to reduce peak battery current when the device fires.

The original article : "Unijunction Transistor Flasher"

Monday, March 16, 2015

Free Download Proteus Version 8.1 SP1 Pro for Windows

Robometricschool. - Here is Proteus Version 8.1 SP1 Pro for Windows free download for you. With following this posting you will direct to other blog to take Download Proteus Version 8.1 SP1 Pro for Windows  from Mediafire file storage.

So, please click link below to easy go to other blog to get link to download Proteus Version 8.1 SP1 Pro for Windows now.

Saturday, March 14, 2015

The Proper Intelligent Light Bulb on the Right Period, for that Right Selling Price

Robometricschool. - Cree was tentative to feature a good lamp for you to their best-selling GUIDED lineup, however that altered in 2010 with the help of the $15 Cree Linked GUIDED. Discussing the develop and illumination requirements involving previous year's well-reviewed Cree 4Flow GUIDED, the newest Linked GUIDED contributes inside a Zigbee airwaves. Set this having a manage switch, and it is possible to turn it off and on remotely, or maybe timetable programmed illumination improvements.

Source: CNET

From kick off, Cree's clever lamp was considerably hitched for the Wink Center, which in turn created feeling considering that you'll obtain both equally off the shelf at home Depot. Since that time, nonetheless, we've got observed established support rotate away intended for extra manage gateways, which includes SmartThings as well as the Philips Hued Fill. Contain the bulbs for the brand-new D-Link version in the Staples Connect Center, as well, even though there isn't established, Zonoff-certified support just yet.

This lamp successful throughout the many platforms we've got analyzed this having, and yes it stocks the sturdy illumination requirements in the 4Flow GUIDED that came ahead of this. Almost all pleasing could be the price. From $15 -- a few bucks a lot more than you'll dedicate to non-connected opposition -- this connections while using the GE Web page link GUIDED since the most inexpensive connected lamp on the market. Pertaining to simple programmed illumination, it really is your best option we've got analyzed nevertheless, and our own existing Editors' Alternative safe bet.

The good This Cree Linked GUIDED offers stable illumination requirements, sturdy convenience, an array of manage alternatives, along with a great price.
This Poor Contrary to standard Cree LEDs, the newest connected bulbs will not dim perfectly about dimmer switches due to interference from your built-in Zigbee dimming smarts. Additionally, the all-plastic artistic may not interest every person.
The lower Series Along with tried and tested electronics inside lamp and smooth efficiency about several platforms, this specific $15 clever lamp is often a clever guess intended for connected illumination.

  • CNET, March 12, 2015

Circuit Schematic MIC Pre-amplifier using LM358 IC

Robometricschool. - Here is simple electronic circuit schematic for MIC Pre-amplifier using LM358 IC like in figure 1 below. This is easy to construct microphone pre-amplifier project using compact electret condenser microphone. The pre-amplifier is important building block of many audio communication systems. Circuit has been built around Op-Amp LM358.

Circuit schematic
Figure 1. Circuit Schematic MIC Pre-amplifier using LM358 IC

Component List and Layout


For you who like with audio sound system, electronic schematic like in figure 1 above is one of the part of audio to amplify microphone input signal. The circuit schematic MIC Pre-amplifier using LM358 IC give you specification as follow :

- Power supply : 5 to 12 VDC @ 10 mA  
- Output: Gain Approx. 100 
- On-Board electret condenser microphone   
- Header connector for connecting of power supply input and audio output  
- Power-On LED indicator  
- Four mounting holes of 3.2 mm each  
- PCB dimensions 35 mm x 40 mm 

The original article : "MIC Pre-amplifier"

Wednesday, March 11, 2015

Agency's Mini Supercomputer be Spy by ​Raspberry Pi stars in UK

Robometricschool. - Maybe you will not foreign again with ​Raspberry Pi. Most people use the $35 Raspberry Pi computer for its intended purpose, as a cheap machine good for education and experimentation. But the UK's Government Communications Headquarters has leveled up by interlinking 66 of the diminutive devices into a single computing cluster.

The spy agency unveiled the GCHQ Raspberry Pi Bramble at the Big Bang Fair for young engineers and scientists -- the target market for the Raspberry Pi project. It consists of eight groups of eight Raspberry Pi machines, all linked over a network and controlled by two central Raspberry Pi machines.

The design is what's known in supercomputing circles as a cluster and, specifically in the Raspberry Pi world, a bramble. Made of the bare-bones Raspberry Pi circuit boards, it's a far cry from the fastest supercomputer today, China's Tianhe-2, which has 3,120,000 processor cores and consumes as much power as 3,400 houses. But fundamentally, the design principles are the same: share a single computing job across many independent nodes. (

Latest Version Proteus 8.2 for Windows

Robometricschool. - Do you want to upgrade your old Proteus software with latest version now? Now you can upgrade it because The Proteus 8.2 release expanded on Proteus V8.1 with a strong focus on library parts in both the schematic and the layout modules. Our other main development thrust was on documentation and report generation with the introduction of a new module in Project Notes and a major rework of the Bill of Materials module. On the Proteus VSM front, we have been working hard on the Arduino product as well as introducing support for new Atmel® Cortex™-M3, PIC16 and PIC18 processor variants.

Please read more about the Proteus Design Suite Version 8.2 for Windows using link below to visit the other blog.