Get a Split Inverter AC for free

Recover the cost of a new split  Inverter AC by discarding your old Window AC. Read below how to achieve it. Split Inverter AC consumes much less power compared to the old generation on/off compressor type. The Inverter technology is the latest state of the art technology that governs the operation of all the electrical motors including the compressors in an AC. The Inverter AC units have a variable-frequency drive (VFD)  that controls the speed of the motors by changing the frequency. Our utility frequency of 50 or 60 Hz can not be changed as they are fixed at the generating station. Therefore incoming utility AC supply is converted to DC and then to AC again through an inverter producing voltage of desired frequency. This Inverter power is used to control the speed of the compressor motor and the blower…

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Very low-cost Robotic tool -The Servo Tester.

It is a very low-cost device at less than Rs 200/- absolutely required for testing small servo motors. It is. a must device for hobby robotics. It is basically to both test and ensures the center position ( at 90 degrees) of a (non-continuous spinning only ) small Servo Motor which is very important for robotic applications as, the unit that is procured from the market, its shaft may not be in the center position. Thus if used without fixing its shaft position in the center, for any robotic application, say a humanoid biped, hexapod, pick and place, gripper, claw, etc during assembling,  then it gives erratic operation at the time of switch on even if the programming is correct. 90-degree position of the shaft is the center position where from the non-continuous servo shaft moves exactly – 90 degrees…

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PWM Module having Adjustable Frequency & Duty Cycle with LCD Display

A very low cost module (< $3) with excellent Features: LCD display of frequency and duty cycle  PWM output can be set to the specified frequency and duty cycle. Wide frequency range with high accuracy; Serial communication features, TTL level Parameter settings The module has four independent buttons, used to set the frequency and duty cycle, momentary press (increase or decrease by a unit) and long press (fast increase or decrease). Parameters get automatically saved, even after switching off and then switching on. PWM output, one can set frequency & duty cycle; It has 4 Frequency ranges, automatic switching: 1   xxx (no decimal point): the smallest  is 1Hz, range  1Hz to 999Hz; 2   x.xx (decimal point at hundred) the smallest is 0.01Khz, trange of 1.00Khz to 9.99Khz; 3   xx.x (decimal at in ten): the smallest unit is 0.1Khz; value range…

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