Showing posts with label a. Show all posts
Showing posts with label a. Show all posts

Friday, January 10, 2014

Build a Low Ripple Power Supply Circuit Diagram

How to build a low ripple power supply circuit diagram. This simple low ripple power supply circuit diagram may be used where a high current is required with a low ripple voltage (such as in a high powered class AB amplifier when high quality reproduction is necessary) , Ql, Q2, and R2 may be regarded as a power darlington transistor.

ZDl and Rl provide a reference voltage at the base of Ql. ZDl should be chosen thus: ZDl = Von-1. C2 can be chosen for the degree of smoothness as its value is effectively multiplied by the combined gains of Q1/Q2, if 100 µF is chosen for C2, assuming minimum hfe for Ql and Q2, C = 100 x 15(Q1) x 25(Q2) = 37,000 µf.


Low Ripple Power Supply Circuit Diagram

Low Ripple Power Supply Circuit Diagram

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Friday, December 27, 2013

Build a Isolated 15V To 2500V Power Supply Circuit Diagram

Build a Isolated 15V To 2500V Power Supply Circuit Diagram. A dc-dc converter using a 74HC04 drives Tl. Tl is a ferrite-core transformer using a Fair-Rite, Inc. P/N 5975000201 (uo + 5000) and has a 7-turn primary and a 25-turn secondary. Kynar, #30 wirewrap wire is used. With Tl, the circuit isolation is good to 2500 V.

Isolated 15V To 2500V Power Supply Circuit Diagram

Isolated 15V To 2500V Power Supply Circuit Diagram

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Monday, December 23, 2013

Build a 2M 6M Transverter Circuit Diagram

Using the bilateral properties of a balanced mixer this transvertcr will produce 6-m output with 2-m inputs. Y1 is a 90-MHz crystal. Note that the input on 2 m is 143 to 144 MHz for 53 to 54-MHz output. This avoids possibility of extraneous 2-m reception during receive periods. If your radio will not transmit below 144 MHz, then use a 93- or 94-MHz crystal frequency.


2M 6M Transverter Circuit Diagram

2M 6M Transverter Circuit Diagram

Build a 2M 6M Transverter Circuit Diagram
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Wednesday, December 18, 2013

Build a Long Line Ir Drop Voltage Recovery Circuit Diagram

How to Build a Long Line Ir Drop Voltage Recovery Circuit Diagram? This Simple Long Line Ir Drop Voltage Recovery Circuit Diagram provides a unique solution to a common system-level power distribution problem: When the supply voltage to a remote board must traverse a long cable, the voltage at the end of the line sometimes drops to unacceptable levels. 

This + 5-V/ + 5-V converter addresses this by taking the reduced voltage at the end of the supply line and boosting it back to + 5 V. This can be especially useful in remote display devices, such as some point-of-sale (POS) terminals, where several meters of cable could separate the terminal from the readout.

Long Line Ir Drop Voltage Recovery Circuit Diagram

Build a Long Line Ir Drop Voltage Recovery Circuit Diagram

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Tuesday, September 10, 2013

Circuit Design of a Photoflash Unit

A photoflash unit has a simple circuit design: a high-voltage direct current (DC) supply is connected in series with a high-resistance resistor (which we’ll call ‘R1′). This resistor limits the current flow. A capacitor ‘C’ is connected in parallel with a flash lamp. The resistance ‘R2’ of a flash lamp is of small value. The circuit contains a switch between the large resistance ‘R1’ and a small resistance flash lamp ‘R2’, such that it can connect either resistance at any time during the process.

Working and Circuit Design of a Photoflash Unit
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Wednesday, June 12, 2013

Make Your Car Cute And You Have A Happy Travel

Fashionable and elegant objects doom to bring our life so many surprises! Creative circular design is absolutely an aesthetic evolution to us. It is suitable for medium-sized paper towels in major supermarkets. Small volume in the car is also very appropriate! Whats more, its simple design and great volume are practical to our home.

Do you want to get something to protect the Car Hand Gear Knob Lever and keep your hands warm in cold days? This cute and soft Plush Car Hand Gear Knob Lever Cover can make a change for the appearance of your hand gear knob. If you want to get this beautiful and comfortable hand gear knob lever cover, youd better decide soon.

This is an indispensable item for your car. Grasp the opportunity to get one! This elegant Luxury Lace Round Fabric Car Tissue Box with lovely design helps you add more fun to your bath and facilitate the whole coordination of furniture in your bath. The design of the tissue box cover is also welcomed by means of rich characters. Moreover, you can play its role fully in your bed room, car, dining room or more.

It is comfortable to touch and with non-slip design! This Soft Cloth Car Manual Gear Knob Lever Cover can change the appearance of your hand brake. If you want to have a beautiful and comfortable hand brake cover, just take it as a gift for you!


Plush Cloth Bag Cube for Car is easy to use from mobile phones to comment on, and do not worry about hiding in a corner of the cell phone was difficult to find the products work fine, feel good, beautiful, generous, easy to clean.
If you want to get this beautiful and comfortable hand gear knob lever cover, youd better decide soon. It is a warm hand brake cover, soft and delicate touch, and you never worry about the freezing cold in winter while diving. It is easy to hold on to and grip, convenient to use.
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Friday, April 12, 2013

Create a electric shock resistant tool

Youve electric shock?? .. Well, .. it was nice to recover all your gout! Sometimes true .. but we often do not touch circuit accidentally in the work that is still connected with line / grid (pln) .. pissed, wants I think we stepped on the stuff ..! patient first. 


Is there any easy way to avoid electric shock in repair work .. can even avoid the occurrence of ESD, if we deal with electronic goods which are sensitive to ESD (PC motherboards, mobile phones, circuit digital etc). you raft just like this series .. used as supply for the solder, when dealing with components which are sensitive to ESD and touch (CMOS IC). the greater capacity of the transformer Ampere. the greater the (good) power which can be handled. The second transformer is identical / similar.
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