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- Last Updated: 2008-12-30
- License: Shareware $24.95 Buy
- OS: Windows 2003, XP, 2000, 98, Me, NT
Spina is referring to HPs recently released in-camera editing feature that makes a person appear more svelte. The tool, called “Slimming Mode,” is part of HPs Design Gallery software, which is included on some of its Photosmart M and R series cameras. It compresses the center of a photo and stretches the edges to fix the aspect ratio, said Linda Kennedy, a product manager for digital photography at HP.
The slimming tool doesnt target people specifically; it will elongate any object centered in the photo, with three degrees of slimness. Like most digital cameras with editing tools, the changed photo is saved as a copy, and the original image remains on the camera intact.
Kennedy, one of the proponents of the feature while it was in development, said the idea came from the many people HP surveyed who said they hated having their picture taken. Kennedy also pointed to another use.
“We had a personal trainer wanting to use the camera as a motivational tactic for her clients,” she said. “Putting a good photo of the person on their refrigerator so they can say, I do want to look like this, as opposed to the fat picture in a bathing suit,” can be inspiring.
HP isnt the only manufacturer to offer this type of alteration feature. With the digital camera market maturing, manufacturers are using new features to entice customers to upgrade their current digicams. Canon, Kodak, HP, Nikon and Olympus all offer features that increase saturation, bumping up the richness of color “seen” by the camera. The photographer clicks and a sunset forever becomes more brilliant than it appeared in real life. Homegrown vegetables become more luscious.
“The consumer products and all these changes in photography, to me, are going to cause an undermining of peoples ability to believe a photograph, which is the foundation of photojournalism,” Southwick said. “Now that it is at the consumer level and people are going to see this, I am not sure on a fundamental level that they are ever going to believe a photo when they see it.”
The A-301 piezo Driver/Piezo Amplifier is a high Voltage, high speed Bi-polar Piezo Driver / Linear
It was designed as a Linear Amplifier / Driver for PIEZO Electric Actuators (also
The Piezo Driver / Piezo Amplifier is based on a high voltage, MOSFET amplifier which is capable of driving up to ±175V (350V ptp).
The current capacity of the A-301 is 60 mA (100 mA peak)
The current capacity of the A-301 HS is 100mA (150mA peak).
The A-301 bandwidth is 30 KHz. while the A-301 HS can go up to 200 KHz.
The slew rate of the A-301 is 30V/uSec. compared to 250V/uSec for the A-301HS.
By connecting 2 amplifiers in series, the output voltage may be doubled to 700Vptp .
The amplifier section is very stable and has a low noise output and a very low electrical noise - Compare Our Specifications!
Competitive Price!
Features:
Low cost alternative for small experiments. Very Low Electrical Noise.
Low Distortion
High Slew rate-up to 400 Volt/microsecond.
Input protection-High Voltage, On/Off.
Output protection – Short-circuit, Power loss,Impedance.
Specifications:
A-301 Piezo Amplifier
| Amplifier section: | |
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Maximum Input Voltage
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± 10 V |
|---|---|
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Maximum Output Voltage
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± 175 V (350Vptp) |
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Maximum Current
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± 60 mA for A-301, +/-100mA for A-301HS |
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Bandwidth
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Into 1 K resistive load |
| A-301:DC – 30 kHz, A-301HS-DC-200KHz | |
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Output Power
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16 Watt maximum |
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DC Gain
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20 |
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Coupling
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Input & Output: Direct DC Coupling |
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DC Offset
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Adjustable to ± 8 Volts + On/Off Switch |
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Input Impedance
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10 K |
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Slew Rate
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A-301: 30V/ µSec, A-301HS:250V/µSec |
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Output Noise
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4 mV PTP max. (0.8 mV RMS max.) (input shorted, 30 KHz. BW) |
| Variable Gain Option: | 0-10X or 0 – 20X or 0-40X available. Please consult the factory regarding that option. |
| Dimensions: | H= 90mm W=134mm L=235mm |
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AC Input
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Line Input Voltage
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110/120 V, 60 Hz and 220/230 V , 50 Hz (Switchable by user) |
| Line Input Current | 0.5 A peak |
Applications:
2 amplifiers can be connected in series or in parallel in order to double the Output Voltage or Output Current.
Series connection (+/- 350V into a floating load = 700V ptp).
Please note that both amplifiers must be floating (i.e. be careful not to ground them via an oscilloscope etc.)
It is also possible to double or tripple the output voltage by using a special transformer. Using a transformer is possible only at
high frequency (over 10 KHz.) and it requires more components to be added for balancing and proper termination of the load.
Parallel connection is done by adding resistors at the input and at the output. Please consult the factory for parallel connection.
Calulating the estimated current needed to drive your load:
| In order to purchase the right amplifier to drive your load, you must calulate the peak current needed. | |||
| For Capacitive load: | |||
| Ipeak(A) = 2 π F C Vpeak (for a Sine Wave)
Ipeak(A) = 4 F C Vpeak (for a triangular wave) Ipeak(A) = C dV / dt (for a square wave or sharp rise time) |
|||
| F=Maximum frequency (Hz.) π=3.1415927 |
C=Capacitance in Farads Vpeak=Maximum Voltage you need to drive your Load. |
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| For Resistive Load: | |||
| I = Vpeak/R | |||
| where R is the resistance of your load in Ohms. | |||
The current, Voltage and Frequency must be less or equal to the amplifiers specifications.
This amplifier is NOT SUITABLE for driving pure inductive loads
(i.e. speakers, solenoides, electromagnets etc.)
You must connect your load with thick wires to minimize inductance (like speaker wires). Coaxial cable is not recommended for cables over 2m (6.5 Ft.) because the capacitance of the cable (15-50 pF/Ft) will load your amplifier at high frequencies.
| Example: The active impedance of a capacitive load is given by the equation: Z=1/(2*Pi*F*C) where Pi=3.1415, C in Farads, F in Hz.The user must check that under the peak operation Voltage, at maximum frequency, the current will not exceed 200mA (0.2A). Example: Operating Voltage is +/-150V, Maximum Frequency=10KHz. Load is 10nF. Z=1/(2*3.1415*10,000*10EE-9) =1592 Ohms. 150[V]/1592[Ohm] =94[mA] ===>The amplifier will drive that load at an amplitude of 150V (300V ptp). |
Fast shipping!!!
All amplifiers are available from stock. We ship within 1 working day after your credit card was approved. Shipping is by UPS. It takes up to 3 working days to ship by UPS to any country.
We accept VISA, MaterCard, American Express. Your credit card is charged only after we ship the order.
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