Posted on August 30th, 2010
ICA UPS – Uninterruptible Power Supply UPS (Uninterruptible Power Supply) adalah suatu perangkat ektronik yang berfungsi sebagai penyimpan listrik cadangan yang dapat digunakan jika arus listrik tiba – tiba putus. Apabila terjadi arus listrik yang mati mendadak, maka UPS akan melakukan switching dari arus listrik ke baterai cadangan, sehingga perangkat elektronik yang terhubung dengan UPS [...]
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Posted on May 9th, 2010
Alat ini berguna bila kita sering mengalami mati listrik. Sebab bila kita sering bekerja denagn computer desktop maka alat-alat tersebut bisa rusak selain hanya mengganggu pekerjaan. Oleh karena itu kita harus memakai perangkat Uninterruptible Power Supply atau UPS. Tujuannya yang utama agar jangan sampai data kita hilang atau harddisk kita jebol. Sebab bisa saja juga [...]
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Posted on October 25th, 2009
UPS singkatan dari Uninterruptible Power Supply. Apa fungsi UPS ? UPS berfungsi untuk menjaga agar perangkat elektronis akan tetap mendapatkan daya listrik apabila tiba-tiba arus listrik dari PLN mati. UPS akan otomatis menswitch dengan kecepatan 0,004 detik dari arus listrik ke power batere, sehingga alat eletronik tetap menyala. UPS banyak sekali dipakai terutama untuk alat-alat [...]
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Posted on June 22nd, 2009
Download Article : Simple Circuit Measures Voltage-Dependent Capacitance.pdf There are many techniques for measuring capacitance. Some of these techniques require a function generator to provide either a sinusoidal or step-function voltage source. The design idea presented here has the advantage of requiring no special excitation source. Instead it relies on a simple test circuit, along [...]
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Posted on June 22nd, 2009
Download Article : Low-Power Thermal Airspeed Sensor.pdf Among the techniques available to measure airspeed, thermal anemometry has the virtues of simplicity and easy miniaturization. Such anemometers use the relationship between airspeed and power dissipated by a heated sensor known as King’s Law. One good approximation to King’s Law is : S = A *[(P-D) / [...]
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Posted on June 22nd, 2009
Download Article : Simple sine-wave generator has no low or high pass filters.pdf Generating sine waves with controlled frequencies over a wide range is difficult when using RC or LC sinusoidal oscillators. However, this performance can be simply created using a wideband digital square-wave oscillator, a counter, and a weighted summing network Using the circuit [...]
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Posted on June 22nd, 2009
Download Article : Nanopower VFC Includes Self-Compensating Charge Pump.pdf Of the many starting points for voltage-to-frequency converter (VFC) design, one of the golden oldies is the classic diode-capacitor charge pump. An example of this fundamental circuit is represented by D1, D2, C1, and C2 (see the figure). Analysis of this simple topology reveals that each [...]
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Posted on June 22nd, 2009
Download Article : Special Low-Pass Folter Limits Slope.pdf Adding several components to a simple first-order; low-pass filter; helps to create a different yet handy filter. The circuit shown in Figure 1 combines a low-pass filter (R2, C1, A1) with a bidirectional diode clipping network (R1, D1, D2). The result is a filter that will limit [...]
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Posted on May 16th, 2009
Anda mungkin sudah mengenal Uninteruptible Power Supply (UPS). Akan tetapi, seringkali orang hanya mengenal dua jenis UPS (Uninteruptible Power Supply) yang memang paling mudah ditemui di pasaran. Kedua jenis tersebut adalah UPS jenis standby dan UPS jenis online. Pada kenyataannya, UPS (Uninteruptible Power Supply) masih memiliki beberapa jenis lainnya dengan keunggulan dan kekurangannya masing-masing. UPS [...]
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Posted on May 5th, 2009
Tentang UPS (Uninteruptible Power Supply) UPS ada dua macam : Sistim Off-line / Line interactive. Pada kondisi listrik PLN hidup maka listrik PLN di teruskan ke beban (PC). Bila listrik PLN mati, maka switch akan segera pindah dan inverter/battere bekerja memberikan listrik ke beban/perangkat (ada jeda waktu pindah 3 s/d 4 mili detik = 0,004 [...]
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