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Based upon the famous, world-class ICOM IC-7800, the new design of the ICOM IC-7851 HF/50MHz Transceiver incorporates exciting features and advanced capabilities that were introduced in the IC-7850LE Find ICOM IC-7851 HF/50MHz Transceivers and get Free Shipping on Most Orders Over 99 at DX Engineering At last, the Pinnacle of HF Perfection - The ICOM IC-7851 HF/50 MHz Transceiver. Pin Diagram of 7805 Voltage Regulator ICkenwood-tr9000-9030-9130-9300-9500-7700-7730-7750-7800-7850-7930-7950-8400 pin1 mic pin2 ptt pin3 down pin6/center earth pin4 up pin5 nc + 8volt some models-kenwood-tr7600-tr7625 pin1 mic pin2 ptt pin3 n/c pin4 chassis/ground pin5 mic screen. IC-7300, IC-7610, IC-7800 V3.0, IC-7851, Flex/SmartSDR, HDSDR, SDRConsole (but not Elecraft P3) Weak signals easy to spot (faint traces) Many zoom levels: 5, 10, 30, 60, , 800 KHz+ Watch the whole band at once, or a small slice Find clear frequencies fast Find who the DX just worked, fast Spot the gaps in a crowded CW pileup 28
Out of these, the TO-220 Package is the most commonly used one (it is the one shown in the above image).Some of the important features of the 7805 IC are as follows: Currently, the 7805 Voltage Regulator IC is manufactured by Texas Instruments, ON Semiconductor, STMicroelectronics, Diodes incorporated, Infineon Technologies, etc.They are available in several IC Packages like TO-220, SOT-223, TO-263 and TO-3. A Brief Note on 7805 Voltage Regulator7805 is a three terminal linear voltage regulator IC with a fixed output voltage of 5V which is useful in a wide range of applications. It is an IC in the 78XX family of linear voltage regulators that produce a regulated 5V as output.
Also, the 0.1μF Capacitor near the output is optional and if used, it helps in the transient response.In this circuit, VIN is the input voltage to the 7805 IC and the source can be from either a battery of an unregulated DC. The 0.22μF Capacitor near the input is required only if the distance between the regulator IC and the power supply filter is high. In fact, if the input supply is an unregulated DC Voltage, then all you need are two capacitor (even those are not mandatory depending on the implementation).The above circuit shows all the components required for a 7805 IC to work properly. The output regulated 5V is taken at this pin of the IC.As I have previously talked about regulated power supply as a device that works on DC voltages and it can uphold its output accurately at a fixed voltage all the time even if there is a significant alteration in the DC input voltage.As per the datasheets of 7805 IC, the basic circuit required for 7805 to work as a complete regulator is very simple.
In the first part, the AC Mains is converted into unregulated DC and in the second part, this unregulated DC is converted into regulated 5V DC. The circuit is made up of transformer, bridge rectifier made up from diodes, linear voltage regulator 7805 and capacitors.If you observe, the working of the circuit can be divided into two parts. Bridge Rectifier (or 4 PN Diodes – 1N4007) WorkingThe AC power supply from mains first gets converted into and unregulated DC and then into a constant regulated DC with the help of this circuit. How to Get Constant DC Power Supply from AC?Although batteries can be used as input to the 7805 Voltage Regulator IC, we face certain bumps like frequent discharge of batteries and reduction of battery voltage levels over a period of time.The best alternative to using Batteries is to provide an unregulated but rectified DC Voltage from an AC Source. Since AC Source is easily available as mains supply, we can design a circuit to convert AC Mains to DC and provide it as input to the 7805 Voltage regulator IC.The following image shows the circuit diagram of producing a regulated 5V from AC Mains supply.
The rectified DC from the bridge rectifier is smoothened out with the help of 1000μF Capacitor.So, the output across the 1000μF Capacitor is unregulated 12V DC. This will limit the current drawn by the circuit to 1A. The secondary of the transformer is connected to Bridge rectifier (either a dedicated IC or a combination of 4 1N4007 Diodes can be used).A 1A fuse is placed between the transformer and the bridge rectifier.
7805 IC then converts this to a regulated 5V DC and the output can be obtained at its output terminals.
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