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The 78xx regulater can be used as a constant current source, by connecting the output to the input side of a series resistor, and the "ground" to the other side of the resistor. Do not connect the "ground" to real ground - leave it floating.
Since the 78xx maintains a constant voltage differential between output and ground, there would be a constant current through the resistor.
What else can I help you with?
What is an 7805 regulator?
7805is a voltage regulator integrated circuit. It is a member of 78xx series of fixed linear voltage regulator ICs. The voltage source in a circuit may have fluctuations and would not give the fixed voltage output. The voltage regulator IC maintains the output voltage at a constant value. The xx in 78xx indicates the fixed output voltage it is designed to provide. 7805 provides +5V regulated power supply. Capacitors of suitable values can be connected at input and output pins depending upon the respective voltage levels.Pin Diagram:Pin Description:Pin NoFunctionName1Input voltage (5V-18V)Input2Ground (0V)Ground3Regulated output; 5V (4.8V-5.2V)Output
What is the approximate value and manufacture date of a Browning A-5 with serial number 78xx with a plain barrel and burled walnut stock?
This serial number would indicate a gun made in 1904. To be sure that this is not an early gun, you can check the barrel. If the gun was made in 1904, the barrel would be stamped: BROWNING AUTOMATIC ARMS COMPANY It is probable that your gun is more modern. Check the gun for a letter above or preceding the 78xx number. The complete serial number would be required to answer the question. Thank you
What is the difference between IC7905 AND IC7805?
Both IC 7805 & IC 7905 are voltage regulators, IC 7805 is Ic 78xx series while IC 7905 is Ic 79xx series with xx representing voltage output
Use of transistor 7812?
7812 is not a transistor. It is a three lead voltage regulator integrated circuit. Its maximum input voltage should be near 35 volts. The minimum input voltage should be near 14 volts. The output will be 12 volts.
What are the Advantages and disadvantages of IC voltage regulator?
IC voltage regulator performs better than any analog voltage regulator. Some IC regulators IC no. are given below- Positive IC voltage regulator- 78xx Negative IC voltage regulator-79xx where xx varies according to the use of ICs raring. as 7805 gives the positive 5 Volt & 7905 gives the negative 5 volt.
How do you make a simple Voltage regulator?
This depends heavily on the intended usage (voltage, power, etc). If your power source already has the correct voltage but you want to regulate power spikes (e.g. electrical noise in a car), you can use a passive RF filter: basically, an LC low-pass filter element. If your power source has a higher voltage than the device you intend to drive, there are two options: a passive regulator, built around a power resistor and a Zener diode, for very low to low power systems, and very low cost; or an active regulator built around a 78XX chip (or equivalent), for medium power systems, and somewhat higher cost. The 7805 chip is very widely used to provide 5V, and will always work. The Zener regulator is really the simplest and cheapest way to do it, but it requires you to modelize your power requirements to choose the correct diode and resistor. If your power source has a lower voltage than the device you intend to drive, there are various chips available, but they generally require more external components like a coil and a capacitor, and require you to do more computations to get right. They also generally cost more.
Why you use capacitor in ic7805?
The manufacturer's data sheet actually recommends using two capacitors with any 3-terminal regulator in the 78xx family: a 0.33µF on the input and a 0.1µF on the output.the input capacitor functions mostly as a filter capacitorthe output capacitor functions mostly as a decoupling capacitorHowever both capacitors should be ceramic capacitors (to reduce parasitic inductance in the capacitors) so that they can operate efficiently at the high frequencies resulting from rapid circuit switching in the load (especially if the load consists of digital logic).
Where is in UK area code 020 3286?
02078 is not a real UK area code. 020 is the area code for London, The number will be (020) 78xx xxxx. The '78xx' part can identify which exchange it is.As the first digit is a "7" there is a good chance that the number is located in central London rather than an outer suburb - especially if the number was issued pre-2000 - although this is not guaranteed.
What is the telephone country code for the United Kingdom?
Area code 020 is used for London landlines, which have eight digit local numbers. Mobile phones (07xxx) and special-rate services (03xx and 08xx) use their own country-wide prefixes.To call from abroad, use the country code +44 and the full UK number minus its leading zero. For example:Landline 020 7946 0029 becomes +44 20 7946 0029Mobile 07345 123456 becomes +44 7345 123456
Where is telephone area code 4477?
It isn't. The 44 denotes a UK number and the 7 denotes a mobile (cell) phone number, a pager, or a personal "follow-me" number.US area code +1 447 has been assigned to central Illinois as an overlay to area code +1 217 (including Champaign and Springfield), but it is not yet in use.(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
