Monthly Archives: September 2010

Capacitive AC-DC Adapter

Posted on September 30, 2010 by Rend

Capacitive power supply is one variation of uninsulated AC to DC adapter. This circuit consist of resistor, capacitors, diode and zener diode. This circuit will allow  the constant voltage to across C1. The input current’s average should be equal to … Continue reading →

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2.5KV Isolated RS232-TTL/CMOS Converter/Driver/Receiver

Posted on September 30, 2010 by Rust

The ADM3251E is a transceiver which has a high speed, 2.5 kV fully isolated, single channel RS-232/V.28. This device is operates from a single 5 V power supply. The device is ideally suited for operation in electrically harsh environments or … Continue reading →

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AD8221 Precision Strain Gage Amplifier

Posted on September 30, 2010 by Rust

AD8221 is an excellent candidate for bridge measurement because it has low offset and high CMRR over frequency. The bridge can be directly connected to the inputs of the amplifier as shown in figure below. The AD8221 is a gain … Continue reading →

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