This circuit adds some capacitors and diodes to a traditional transformer type series regulator circuit to extend the normal operating range. It can insure regulation during low line voltage conditions or it can squeeze a few more watts out of a plug-in-the-wall power adapter power supply.
Read More Source:
http://www.discovercircuits.com/DJ-Circuits/pwrboost.htm
Thank you.
High voltage power supply, Power supply [...]
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A low voltage preamplifier optimised for 3 Volt operation.
This is a special low voltage version of my audio preamp. T1’s emitter voltage is biased close to half supply voltage (1.5V) to allow for maximum output voltage swing. Both transistors are direct coupled and have closed loop feedback to aid temperature stability.
Read More Source:
http://www.zen22142.zen.co.uk/Circuits/Audio/lvpreamp.htm
Thank you.
BC547, Pre [...]
Here is the schematic diagram of my regulator. You may want to print it out, and then go on reading. This regulator is designed for 12V systems employing panels of up to 7A total current, and loads of not over 20A. It can be easily modified for greater currents.
U1A compares an adjustable sample of the [...]
Hi,
I have a voltage out put in 2mV.i want to read it in volt.So i need to amplify it.Can any body suggest the samllest amplifier or rectifier available.
Detects 1.8 to 230 Volts DC or AC. This circuit is not a novelty, but it proved so useful, simple and cheap that it is worth building. When the positive (Red) probe is connected to a DC positive voltage and the Black probe to the negative, the Red LED will illuminate. Reversing polarities the Green [...]
Useful for power lines control
Simple, transformerless circuitry
This circuit, designed on request, has proven to be useful to indicate when the voltage in a power supply line is changing from 120V to 240Vac. It can be used in different circumstances and circuits, mainly when an increase in ac or dc supply voltage needs to be detected.
D3 [...]
I will be grateful if somebody can give me some info about where might I buy a photodiode and a voltage amplifier (to be used with the photodiode) that works in the 10 MHz regime, and is not very expensive.
For regulating a solar panel’s output, there are several possible ways. A linear series regulator can be used, but has the disadvantage of causing some voltage drop and having some internal power consumption at times when the sun is weak and the load is heavy. It’s much better to use a shunt regulator, which is [...]
This is a High Voltage switching device for driving coils and which have big impedance when it is switched off. It can be use in Back-EMF energy recovery tests, Newman coils electronic commutator…..This device is drived by an opto-coupler and can be easily connected with an opto-switch for synchronisation phase (with plastic shutters) with a [...]
sir
I was happy to see your answers based on LEM current sensors. I'm doing an automation project for testing the parameters associated with printer circuits. Our focus is on the three basic parameters namely voltage,current and temperature.I would like to have a brief idea of the best sen
I want to calculate the voltage of electric element which will maintain the the temperature of box beteween 30C to 90C
plz let me know if anybody knows
A D.C. power supply is usually regulated by some type of feedback circuit that senses any change in the D.C. output and develops a control signal to compensate for this change. This feedback maintains an essentially constant output. In a monolithic regulator, the output voltage is sampled and a high-gain differential amplifier compares a portion [...]
This power supply eliminate voltage loss on current meter. Will be designed for measure on low voltage DC/DC converters (e.g. LED lamps powered from single NiCd/NiMH cell)
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Regulator 1.25-30V 1A By LM317T(with PCB)
More circuit about [...]
Uses the MAX641 switching controller and an external discrete charge pump to step up the input voltage. This circuit can service low loads and is efficient when the output is two, three, four times the input voltage. Adding the MAX627 MOS driver can further increase the output current capability.
Read More Source:
http://www.maxim-ic.com/appnotes.cfm/appnote_number/5/ln/en
Thank you.
dc to dc converter [...]
We have a plant with some electrical problems. (recent fire) arcing on the line side of switch gear started the fire. Could not find any problems on the load side. Power company installed a recorder on the transformers. So far showing 320-340 volts on 277 phase. What does this mean?
You can use this calculator to vary the value of the program resistor (R1) and output set resistor (R2) and calculate the output voltage for the LM317 / LM338 / LM350 family of three terminal adjustable regulators. This calculator will work for most voltage regulators with a reference voltage (VREF) of 1.25. Typically, the program [...]
Mod a 9V rechargeable battery to give you +3.6V, Ground and -3.6V.
You will appreciate this idea if you ever had to clobber together a bunch of AAs or AAAs to get a project working.
This instructable was meant to be part of a larger project, but I decided to submit this part alone to the 9V [...]
The circuit shows one way of obtaining a voltage of 90 V from a 1.5 V battery supply. The LT1073 switching regulator from Linear Technology (www.linear-tech.com) operates in boost mode and can work with an input voltage as low as 1.0 V. The switching transistor, which is hidden behind connections SW1 and SW2, briefly takes [...]
Another power supply that can be used for the Geiger-Müller tube variant of the cosmic ray muon detector.
If the specific transformer mentioned in the schematic is not available to you, any transformer with the specifications primary 117VAC, secondary 6.3VAC CT (center-tapped) should work.
In this case you might have to choose a different drive frequency in [...]
You’ll need a variable high-voltage supply to operate the detector.
The transformer is uncritical and easy to build. Use a E or EI core without air gap with an AL value of approx. 2000nH/W2. The primary coil has 25 windings of 0.7 - 1 mm magnet wire; the secondary coil has 500 windings of 0.2 - [...]
The LM2695 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load.
• High Efficiency Point-Of-Load (POL) Regulator
• Non-Isolated Telecommunication Buck Regulator
• Secondary High Voltage Post Regulator
Datasheet
Output Current 1250 mA
Output Min 2.5 Volt
Output Max 24 Volt
Frequency Min 50000 Hz
Frequency Max 800000 Hz
Efficiency 96 [...]
I live in india. I want to connect a new computer at my home,
when i run my computer and measure the voltage between ground and neutral wire it shows 45-50 volts.I dont know where is the problem,
and when i measure voltage between live and neutral it shows 243 volts.
should i ru
A friend of mine who runs an electronic shop wants to install an old cd-rom to be used as a stand alone cd-player in his truck. His problem was to find a suitable power supply for this purpose. A cd-rom uses 2 power supplies, 5 Volts which is used in its logic circuit and 12 [...]
There are many small applications where it would be preferable to power a device directly from an RS232 (V.24) interface, avoiding a mains power supply. Most ICs require 5 V, and the interface can provide a current of around 8 mA, almost all of which would be consumed by a readily-available voltage regulator, leaving nothing [...]
Hello All....
I am looking for a way to provide connectors (perhaps cam-type devices) for a 2500 KW medium voltage (4160 volt) portable generator. The same way you would provide a "generator receptable" for a 480 volt generator. I am anticpating six (6) parallel sets of conductors.
A
Here is a simple circuit for generating over 100 volts from a 12 volt source for powering low current devices and experiments. The two transistors may be 2N4401 and 2N4403 or similar for lower power applications or higher power devices for heavier loads. If more power is desired then lower the two 10 ohm emitter [...]
The following circuit is used to determine the breakdown voltage of electronic components without causing permanent damage. The circuit quickly ramps the high voltage up from zero and stops when the leakage current reaches a preset amount up to 100 uA.
Read more Source:
http://www.techlib.com/electronics/highvolts.html
power supply, Power supply circuit, power supply high VoltageShare This
hi everybody
before i am sorry my terrible english
i wanna control a current at 16kv dc voltage, how do i do that?
i will use that for a CO2 laser unite.
if someone have interested that, pls help me about that...
thanks...
I am doing some research on direct current generators and can't seem to find the answers to a few questions. I understand that motors can be spun mechanically to generate power. However what would be different between a purpose built motor, and a purpose built generator, or would they be identical.
Here is circuit Switching power supply dual voltage, output 5V 1A and 3.3V 1A.
Use IC LM2575 SIMPLE SWITCHER 1A Step-Down Voltage Regulator ,and IC LM1117 is 800mA Low-Dropout Linear Regulator. Volt suppy 9V - 60V
Detail more see to image circuit.
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13.8V 40A Switching Power Supply By LM3524,LM324
Switching [...]
This low voltage circuit can be used to monitor battery and other volatile sources of current for problems. The circuit sounds an alarm and lights an LED, but can be interfaced to any number of other circuits for many different uses.
Description
R1, R3 2 1K 1/4W Resistor
R2 1 5K Pot
U1 1 LM339 Voltage comparator IC
D1 1 [...]
what should be a earth to neutral voltage. And what is the correct procedure to measure the same.. and is there any spec for the same.. Pls tell me kn...
If you want to try a higher voltage with your pedals, try this simple and easy voltage doubler circuit which uses an ICL7660 CMOS Voltage Converter Chip I have found that JFETs such as the J201 sound much better at 18V than they do at 9V with more clean to distorted headroom. Op amps should [...]
parts:
U1 NE555 timer IC
R1 2.2k ohm resistor
R2 15k ohm resistor
C1 0.01 uF ceramic capacitor
C2, C3 220 uF electrolytic capacitor
C4 470 uF electrolytic capacitor
D1, D2 1N4002 diode
all resistors are 5 or 10 percent tolerance, 1/4-watt
all capacitors are 10 percent tolerance
this circuit rougly doubles the voltage of the input, however the current output is low. doubled output [...]
LM2577 (3A)
DC to DC step up voltage regulator.
Wide input voltage 3.5Vdc to 40Vdc.
This ic Circuit DC to DC Converter Step up Voltage Regulator From 5V To 12V 1A Regulated Output.
Component list
- 2.2k? 1/4W resistor
- 0.1uF capacitor
- 0.33uF capacitor
- 680uF 50V electrolytic capacitor
- 1N5822 high speed schottky diode (3A)
- wire coil inductor, 100uH
- “for LM2577-adj IC” [...]
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I noticed by accident the other day that there is approximately 36 volts potential between the unconnected end of the antenna coax cable that was atta...
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