Free Simple Circuit Diagram
This is a temperature indication and control system using the AD596/AD597. In this system, AD596/AD597 is used as a closed-loop thermocouple signal conditioner. This system uses an external op amp to implement setpoint. The advantages of this system are preserves the alarm function for open thermocouples and provides a high level (10mV/°C) output for the A/D panel meter. Here is […]
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This is a 4 mA TO 20 mA CURRENT LOOP circuit. This circuit is used to transmit a signal over long distances. The accuracy of this circuit is not compromised by voltage drops across the line. This circuit must consume less than 4 mA, because the remote end must receive all of its power from the loop. This circuit require […]
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This is a grid dip oscillator (GDO) circuit developed by Luigi Falcone. This circuit uses seven plug in coils covering 3.0 to 30Mhz. This circuit can be connected to the a frequency meter by using The coaxial socket J2. The figure below shows the schematic diagram of the circuit and the coil information: DC amplifier is formed by TR2 that […]
Read moreThe circuit of battery monitor below uses 3 separate LEDs. Voltage level between 6v to below 11v will turn the red LED on and will turn off above 11v. Between 11v and 13v will turn the orange LED on and will turn off above 13v. The green LED illuminates above 13v. [Source: talkinglelectronics.com]
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