USB Powered Mobile Phone Battery Charger Circuit

Description  This simple circuit can give regulated 4.7 volts for charging a mobile phone. USB outlet can give 5 volts DC at 100mA current which is sufficient for the slow charging of mobile phones. Most of the Mobile Phone batteries are rated 3.6 volts at 1000 to 1300 mAh. These battery packs have 3 NiMh or Lithium cells having 1.2 volt rating. Usually the battery pack requires 4.5...

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A Low Cost Hearing Aid Circuit

Small and transportable unit, Useful for previous men and previous womenThis most economical, general-purpose electronic hearing help works off 3V DC (2x1.5V battery). The circuit will additionally be simply assembled on a veroboard. For easy assembling and repairs, use an 8-pin DIP IC socket for TDA2822M.Circuit Diagrams: A Low Cost hearing Aid Circuit Parts:P1 = 10K R1 = 2.2K R2 =...

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170W power amplifier LM4651 and LM4652

170 Watt power amplifier is a power amplifier that is built by IC LM4651 and LM4652.Part of this power amplifier driver using the LM4651 IC designed specifically for the purpose of the class AB amplifier driver with short circuit protection feature, containing under voltage, thermal shutdown protection and standby functions. Section 170 Watt power amplifier using LM4651 IC with a MOSFET power amplifier...

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Simple Light Sensor Alarm circuit with NE555

Occurring this circuit sent out an alarm when its LDR sensor is exposed to light by sun or lamp. A 555 stable multivariate was used here which sent signal a tone of about 1kHz upon detecting light.The sensor when exposed by light completes the circuit and makes the 555 oscillate at about 1kHz with transistor to drive current.The sensor is also shown in the circuit diagram. It has to placed making...

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Solar Relay

With extended periods of bright sunshine and warm weather, even relatively large storage batteries in solar-power systems can become rather warm. Consequently, a circuit is usually connected in parallel with the storage battery to either connect a high-power shunt (in order to dissipate the excess solar power in the form of heat) or switch on a ventilation fan via a power FET, whenever the voltage...

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Build a Voice Scrambler or Descrambler Circuit Diagram

This Voice Scrambler or De-scrambler Circuit Diagram uses an NE602 as an inversion mixer. U2 is set to run at about 2.5 to 3.5 kHz. U3 drives a loudspeaker. Because speech inversion scrambling is its own inverse, the circuit will also descramble . Voice Scrambler or Descrambler Circuit Diag...

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Runs Switcheselectrical Wiring Forumgardenweb

Handymanwire Wiring A 3 Way Or 4 Way Switch Handyman.Way Switch Wiring Diagram 2.Double Pole Switch Wiring Diagram Electrical Information Blog Pc.Mark The Three Way Switch Common Wire.Stewmac Com 3 Way Lever Action Switch Free Information.Installing A 3 Way Switch With Wiring Diagrams The Home Improvement.Three Way Swiched Circuit Wiring Diagram.Lights With 2 Way Switch Wiring Diagram.Runs Between...

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USB Keyboard Made from Old Typewriter

Looking for a singular gift? Here’s an vintage typewriter which has been modified to function as a USB Keyboard for PC, Mac, and even iPad. That’s very cool, isn’t it?In the sector of obsolescence, this USB typewriter is a groundbreaking innovation. It does no longer trade the outward look of the typewriter and is simple to put in because there is no messy wiring. The three elements of the USB...

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Car Battery 12v Charger

The usual chargers of battery automotive, are simple and cheap appliances that charge continuously the battery, with a rythm of few amperes, for the time where the appliance is ON. If the holder do not close in time the charger, the battery will overcharge and her electrolytic faculty are lost with evaporation or likely exists destruction of her elements. The charger of circuit exceeds these...

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Electrical Floorplans Power Voltage Structured Wiring

1964 Gmc Truck Electrical System Wiring Diagram Circuit Schematic.Free Wiring Diagrams Download Free Wiring Schematics.Home Electrical Wiring New Home Remodels Additions As You Wish.Wiring A Switched Outlet Wiring Diagram Electrical Online.Electrical Floorplans With Power Low Voltage And Structured Wiring.Electric Trailer Brake Controller Wiring.Kawasaki Vulcan Vn750 Electrical System...

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Precision Full Wave Ac Dc Converter Circuit Diagram

A dc level is produced that corresponds to the ac input rms value (if sine wave), -i set the gain of IC2 to 1.11. This factor is the average-to-rms conversion factor. IC1 and IC2 act as a full-wave rectifier circuit, with Dl and D2. Precision Full-Wave Ac/Dc Converter Circuit Diagram...

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555 Timer Modeling

The 555 IC timer chip is widely used as both a monostable and astable multivibrator. Originally introduced by Signetics using bipolar technology, the 555 is now available from several manufacturers in bipolar and CMOS technolo...

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TA8210AH car audio amplifier circuit

IC TA8210AH By using this you can apply a series of audio power amplifier is the car audio system. In general, all the speakers in the car using a subwoofer speaker, and woofer. Because the car is not big room so the sound is being required is not too high.Audio amplifier circuit can work at a minimum voltage 12-volt DC, if supplied under voltage 12-volt amplifier work will be less than the maximum....

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Simple Audio Filter Analyzer Circuit

When this circuit is connected to a filter and an oscilloscope, the scope displays the filter`s frequency response. A frequency that sweeps from low to high is applied to a filter. An oscilloscope is triggered by* the start of the sweep and ends its trace at the highest frequency of the sweep. The filter output goes to the vertical amplifier of the oscilloscope. Using bandpass filters as an example,...

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Ni cad Charger Circuit Diagram

Ni-cad charger with current and voltage limiting. Lamp LI will glow brightly and the LED will be out when the battery is low and being charged, but the LED will be bright and the light bulb dim when the battery is almost ready. Ll should be a light bulb rated for the current you want (usually the battery capacity divided by 10). Diode D1 should be at least 1 A, and Z1 is a 1W zener diode with a voltage...

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Reuse Old Mobile Phone Battery for LED lighting

Normally mobile batteries have a lifespan of 2-5 years under normal usage. But then we have to replace them. Nowadays there are cheap replacement batteries which cost no more than 1$. But these low cost batteries run only 6-12 months. What to do with the used batteries, which can’t be reused in mobiles? Well, easy solution is to use the batteries in a circuit that requires less current....

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