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Hi, To get a voltage from battery, you nedd a voltage divider in 0-5V input. For calculate a divider, you nedd know a input impedance from PLC. See in PLC manual. For top charged battery, voltage is 14V, for mesure this put a resistor between positive battery terminal and PLC input, this...

Hi, Your espresso machine run in 220V/60Hz without problem. This machine have inside a water heater and small motor for pump and grinder. Regads, M3

Hi, Try this AN: http://www.promax.dk/download/data/Tech_support/DC-DC/MC34063-app-note.pdf Regards, M3

Hi, try a weight scale. M3

Hi Lyledunn, Electronic transformers are simple switchmode power supply, and isolation in this device is achieved by high-frequency transformers,the same type as used in modern electronic equipament (computer,fax,vcr etc). Regards M3

____| |_______|\|_______________ | | | |/| | + C2 | D2 | 230VCA _|_ |+ D1 /_\ ----- 12VDC | ----- C2 ________|___________|_________-

Hi Carlos, Try this: _____| |_______|\|_______________ | | | |/| | + C2 | D2 | 230VCA _|_ |+ D1 /_\ ----- 12VDC | ----- C2 ___________|___________|_________- C2=...

Paul, For clean and stable DC bias use a battery and precision voltage reference (ex.:REF02 from Burr-Brown). This best way for low noise DC bias. Burr-Brown and Analog devices have a instrumentation amplifier (Ex.: INA101, INA102,INA105, AD628, AD620, etc). Regards, M3

Hi Shiju, Use a Tantalum capacitors or low ESR (Equivalent Series Resistence)electrolytic capacitors. When use a Tantalum capacitors, put a several devices in parallel, this capacitor not have a large capacitance. Regards, M3

Anakin14, Output Power? M3

AliPentland, Compact Flash no need special driver to run in DOS or Windows. This memory card have a built in microcontroller and just add this in IDE port of CPU board. I have trouble when use a CF for Boot, some CF not run. The better is Sandisk and Danelec. Regards, M3

Hi, LM339 is a open collector comparator, try use a CA3140. Regards M3

Rawlings, Try ML2036 or ML2035 from fairchild, this a simple DDS frequency generator with senoidal output. You need add a low pass filter and operational amplifier to obtain a desired output level. This device operate in any frequency from DC to 25KHz...

Fei, Try national agc amplifier CLC520, http://cache.national.com/ds/CL/CLC520.pdf Regards, M3

Skorpios, You have a pull-up resistor in 393 output? The 393 is open colector. M3

Walker, Simple answer: production cost.

Hello Kodabear, Try 6N136 from Fairchild (http://www.fairchildsemi.com/pf/6N/6N136.html) M3

Hello Walker, This pulse transformer have three functions: 1- Self-oscilating when power supply is turned on, this function generate a initial voltage to supply a TL494 locate in secundary side. A auxiliar power supply is not necessary 2- Isolate a trigger pulse from TL494 to power transistor...

Hello everyone, I need an AC senoidal (60Hz)voltage controlled current souce, capable to generate 20 Amps @ 2Vrms and no load impedance dependece. My goal is to build the KWH meter tester. Best Regards, m3