Free Simple Circuit Diagram
This is a 100MHz Varicap Oscillator circuit. This circuit can provide modulation signals less than 28V and frequency deviation of 28 MHz peak-to-peak. This circuit uses two variable-capacitance diodes which is connected to d-c bias and audio modulating signals in parallel connection and connected in series to r-f. Here is the circuit: [Circuit’s schematic diagram source: seekic.com]
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Current regulator acts like a load when connected to a voltage source, or in series between voltage source and real load. The main characteristic of a current regulator circuit is that it will try to keep the current flowing through it to be constant, by dynamically adjusting its self resistance. The schematic diagram below show the circuit: The current will […]
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As long as we have a stable voltage reference, a stable voltage source can be produced by amplifying the reference. LM10 provide both the reference and the amplifier, so it need no additional external components to build such system. Here is the schematic diagram of the circuit:
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Using this circuit a low voltage battery can be increased to 5V. The need of input voltage of this circuit is only 1.5V and the output voltage is 5V at 40mA. Using 2.4V input, this circuit can supply 180mA at 5V. This circuit uses a MAX641 step-up dc/dc converter. The power handling ability and efficiency of MAX641 can be improved […]
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