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USB port AA NiMH and NiCd Battery Charger by IC 393
2007-08-05 18:28:00
I Find circuit Char tger battery AA NiMH for USB port. I see to Good WEB : http://www.stefanv.com/electronics/ Detail : In a recent blog entry, I complained about all the chargers and wall warts I need to carry with me when going on a trip. This project, which can charge a pair of AA Nickel Metal Hydride (NiMH) or ...
More About: Battery , Port , Charger

Modify power supply computer 230W For 13.8V 20Amp
2007-08-05 17:21:00
 Modi fy power supply computer 230W For 13.8V 20Amp “Opened up a whole bunch of SMPS (around 12) from different manufacturers and carefully examined them. The worst power supply was a Chinese made brand which advertised a 250 watt rating together with 5 volts at 25 amps on the cover plate but on examination ...
More About: Power , Computer , Switching regulator

Power Supply Regulator 190-320V 50mA
2007-08-05 11:52:00
Schematics by Rainer zur Linde from his book “Build your own Audio Valve Amplifiers”. Output 190-320V up to 50mA. Read More Source : http://www.bonavolta.ch/hobby/index.html High Voltage Generator, High voltage power supply, Power supply circuitShare This

Power Supply Regulator 10-350V 50mA
2007-08-05 11:49:00
Schematics by Rainer zur Linde from his book “Build your own Audio Valve Amplifiers”. Output 10-350V up to 50mA. Read More Source : http://www.bonavolta.ch/hobby/index.html High Voltage Generator, Power supply circuitShare This

High-voltage circuits by 7555
2007-08-04 17:03:00
 This is a pulse-mode transformer circuit that I have some experience with. I used this successfully in combination with a Polaroid transducer. Introduction The circuit can be used to generate a voltage of about 70V using a current of about 4 mA @ 6V input voltage. The use of an easily available stroboscope trigger coil makes it quite ...
More About: Circuits , High , Voltage , Volta

PWM Speed Motor Controller By IC 555
2007-08-04 07:41:00
 PWM Speed Control Motor By IC 555 This 555 timer based PWM controller features almost 0..100% pulse width regulation using R1, while keeping the oscillator frequency relatively stable. The frequency is dependent on values of R1 and C1, values shown will give a frequency range from about 170 to 200 Hz. Any 555 ...
More About: Controller , Troll , Roller

LM324 PWM Control Motor Speed
2007-08-04 07:34:00
This uses the LM324, a 14-pin DIL IC containing four individual op-amps and running off a single-rail power supply. The sawtooth is generated with two of them (U1A and U1B), configured as a Schmitt Trigger and Miller Integrator, and a third (U1C) is used as a comparator to compare the sawtooth with ...
More About: Motor , Speed , Control

Pulse Width Modulation (PWM) Control by LM324
2007-08-04 07:30:00
Pulse Width Modulation (PWM) Control by LM324 Electronic Control, LM324, Motor ControlShare This
More About: Puls , Pulse

Lightning Activated Camera Shutter Trigger by LM324
2007-08-04 07:22:00
  Description This circuit is used to trigger a camera’s electronic shutter circuit when a flash of lightning is present. This circuit would also work for photographing fireworks displays or other events involving flashes of light. Theory In a nutshell, the photo darlington converts light pulses into electrical pulses, the first LM324 section amplifies the electrical pulses, the second LM324 section is a high pass filter that only passes quick changes (lightning). The third LM324 stage is a comparator that allows only large pulses to pass through, and the 4047 one-shot stretches out the length of the pulses so that they are long enough to drive the relay and trigger the camera. The 2N3904 drives the reed relay, which in turn triggers the camera’s electronic shutter switch. The VN10KM prevents the circuit from triggering the camera when it is first turned on. The LM324 GND Ref circuit divides the 9V power into two for a 4.5V ground reference. The other op-amp circuits us...
More About: Camera , Lightning , Shutter , Shut , Activate

Power Supply Regulator 53V, max output 2A by 2N3055
2007-08-03 09:10:00
  This is OLD Circuit. Power Supply Regulator 53V, max output 2A by 2N3055, Use part Easy to buy and Very Low Cost. Source : http://www.bonavolta.ch/hobby/en/audio/re g_sup.htm Power supply circuit, power supply, regulatorShare This

Simple power supply variable Voltage 0-15V, max output 1A.
2007-08-03 09:03:00
Simple power supply  variable Volta ge   0-15V, max output 1A. Source : http://www.bonavolta.ch/hobby/en/audio/re g_sup.htm Power supply circuit, power supplyShare This
More About: Simple

Power Supply A fixed Voltage of 6, 9 or 12V, max output 1A.
2007-08-03 08:59:00
  Power Supply A fixed Volta ge of 6, 9 or 12V, max output 1A. Source : http://www.bonavolta.ch/hobby/en/audio/re g_sup.htm Power supply circuitShare This
More About: Fixed , R 12

High Voltage Generator for Low Current Applications By 4069
2007-08-03 08:34:00
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 ...
More About: Applications , Current , Generator , High , Voltage

Simple Fuse Monitor Alarm
2007-08-03 06:43:00
  It came to me in a flash. A simple way to see if a fuse has blown without removing it from its holder. Its not often you can design a circuit using just two components, but with just one resistor and an LED this circuit provides visual indication of when a fuse has blown. LED 1 is normally ...
More About: Monitor , Simple , Alarm

Linear Regulated Dual Polarity Power Supply by LM317 and LM337
2007-08-03 06:32:00
  The circuit is fairly standard of a linear supply, and the function of each part can be described as follows: TX1 is a center-tapped transformer which converts the line voltage from 120 or 240VAC to a lower value which can be managed by the filter circuitry.  See note 1 for more details. Diodes D1-D4 rectify ...
More About: Power , Linea , Dual

Fast Electronic Fuse for 220V
2007-08-03 06:23:00
Circuit :Miroslav Adzic - Serbia & Montenegro Description: A fast electronic fuse designed to operate on 230V AC with an adjustable trip current. Notes: When the current through the load exceeds a level determined by the position of the wiper on the 1k wire-wound pot, this circuit cuts off the load immediately. If S1 is open, the range is ...
More About: Electronic , Fast

Shunt battery charger provides
2007-08-03 05:30:00
Shunt battery charger provides 1A continuous curren LT1635 circuit battery chargerShare This
More About: Battery , Charger , Hunt , Shun , Char

12V 6 Amp Solar Power Center (SPC2) by TL2272
2007-08-03 05:28:00
The SPC2 is a solar power center, it can be used to handle all of the power functions for small 12 Volt solar powered devices. It contains a photovoltaic charge controller and a low voltage load disconnect circuit. The low voltage disconnect has a load on-off switch, and a battery low voltage indicator. ...
More About: Power , Solar Power , Solar , Lighting , Center

Converter 9VDC to 12VDC ( For Solar Charger)
2007-08-03 05:22:00
If you require 9v to 12v output, you will need to add the four voltage-regulating components shown in the diagram below. The voltage-regulation components added, the circuit produces a 9v ...
More About: Solar , Converter , Charger , Char , Vert

Circuit Power Supply Regulator 0-30V 3A By MJ3001
2007-08-02 10:45:00
Circuit Power Supply Regulator 0-30V 3A By MJ3001 It is easy Circuit,Use Transistor MJ3001 and BC548. Output Volt 0-30V 3A. Power supply circuit, power supplyShare This
More About: Circuit

circuit Power Amplifier OCL 35W By NE540+2N3055
2007-08-02 10:37:00
circuit Power Amplifier OCL 35W By NE540+2N3055 Power Supply Voltage +25V/-25V 2A. Output 8 OHM Speaker. 2N3055, Power AmplifierShare This
More About: Circuit

Simple DC-DC Converter
2007-08-02 09:39:00
Have you ever wanted to build a circuit to run off a single 9 Volt battery only to find you needed levels like +12 and -12 Volts? The thought of multiple batteries might have put you off. Why not use a simple DC to DC converter?Just to prove a point, here’s a DC to DC ...
More About: Converter , Simple , Vert

Tripler Converts 5V to 15V by MAX1983
2007-08-02 09:35:00
By configuring a charge-pump voltage doubler as a tripler, you can readily derive 15V from 5V (Figure 1). A 15V rail is useful for powering op amps, LCD-bias circuits, and other low-current applications. The connections shown configure the IC1 voltage doubler as a tripler. The no-load output voltage of the circuit is approximately 3VIN -2VD, ...
More About: Switching regulator , Converts , Triple , Vert

Discrete LDO Regulator 5V (low drop-out regulator)
2007-08-02 09:23:00
Introduction The discrete LDO design presented here came about because of the need for an LDO (low drop-out regulator) for 5V designs. Subsequently it was used successfully in two designs. There are better performing LDO parts, but they tend to be either single ...
More About: Disc , Drop

CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
2007-08-02 09:19:00
CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER pdf file Power supply circuitShare This
More About: Converter , Charge , Voltage , Pump , Char

Power supply regulator for Bicycle
2007-08-02 09:18:00
This is a regulator for a 6V/3W bicycle generator system. The purpose is to switch to rechargeable batteries when the generator is idle. In addition, the device limits the voltage across the bulbs when the generator operates at a high speed. As you can see, the circuit is purely electrical. In the presented design, the ...
More About: Power , Bicycle

Intelligent NiCd/NiMH Battery Charger - Construction Project
2007-08-02 04:51:00
This cheap and easy to build NiCd/NiMH Battery Charger is suitable for automatically charging a wide range of batteries for many applications. Proper chargers are usually expensive and cheap chargers supplied with the original equipment often incorrectly charge the cells and dramatically shorten their life. This ‘intelligent’ charger was designed for high current and rapid ...
More About: Project , Intelligent , Construction

NiCad Discharger for Tx & Rx Packs
2007-08-02 04:48:00
Parts List: Resistors: 10K(7), SOT 16K4 & 6.9K, 470 Ohm(2), 4K7(2), 1K(3), 47 ohm/5W, 47ohm(2 parallel). Capacitors: 10uF (electrolytic), 0.1uF (ceramic). Transistors: BD681(2), BC548(1) Diodes: 1N4001(2) Led’s: Red, 5mm(2) IC: LM3900, 14pin, plus 14-pin socket Switches: Momentary, push-on(2) The Care and Feeding of NiCad Batteries: The reason I designed this discharger are many, however I will list a typical example. A modeler ...
More About: Pack , Disc , Packs , Char

MAX745 Switch-Mode Lithium-Ion Battery-Charger
2007-08-02 04:44:00
MAX745 Switch -Mode Lithium -Ion Battery -Charger battery charger IC MAX745, pdf file battery chargerShare This

Motorcycle Battery Charger, 12V 3A charger, LM1458 circuit
2007-08-02 04:43:00
Motorcycle Battery Char ger , 12V 3A charger, LM1458 circuit battery chargerShare This
More About: Motorcycle , Circuit