Free electronic circuit design and schematic diagram
This shunt regulator acts like a Zener diode, but we can adjust the voltage (via a potentiometer). Here is the schematic diagram of the circuit: When the maximum load current is known, then we can choose Rs such as that Rload (at max current) and Rs form a voltage divider that gives a voltage level at slightly higher than the […]
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This is a single supply instrumentation amplifier circuit. This circuit can be used to replace the function of conventional differential-amplifier topologies to load the Dc gain on a low level signal. This circuit has high input impedance of non-inverting op-amp inputs. Here is the circuit : This circuit uses single supply, so the strain gauges are operated from Vcc. There […]
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Usually, when an high heating of the application environment is occurred due to the power dissipation, we use high current linear solution to solve that problem. But, we can solve that problem using Adjustable 1.5A Step Down 1.5 MHz Switching Regulator circuit. This circuit use ST1S03 step down DC-DC converter. The ST1S03 can also used for powering low-voltage digital core […]
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This is a Light position controller circuit. Light position controller is a monolithic integrated circuit which is used in passenger cars. Potentiometer on the dashboard is used to define the light beam’s elevation of the head light of the car to a state by the car driver. Here is the circuit: This circuit has some features, they are Thermally protected, […]
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This is a driver circuit for siren. This circuit usually used for car alarms. To build this circuit, we use VD-MOS FETs. This circuit receives 12 v supply from battery. A microprocessor sends complementary pulse waveforms to the driver circuit as inputs. Here is the circuit : This circuit uses two PHC21025 which each of them contains two FETs. Two […]
Read moreThis is a measuring resonance of very low frequency (vlf). This video shows an easy way to measure the resonance for coil on very low frequency. The frequency range is between 5kHz-30kHz. this video also provides the circuit that is used to measure the resonance of the coil. On this video, to measure the resonance of VLF coil, the 370ohm […]
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This is 10.7-MHz IF amplifier circuit. This circuit is used in many application such as cell phone base station receivers (final IF) and FM broadcast receivers. The ceramic filter that is used in this circuit are cheap and available in a variety of insertion losses and banwidths. This circuit uses a 230-kHz bandwidth filter SFELA10M7GA00-B0 and the gain stage. Here […]
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