SINGLE CHIP FM RADIO

Single Chip FM Radio Circuit This to a great degree basic FM radio recipient circuit is made conceivable by the extraordinary reason TDA7000 IC. It coordinates about every one of the capacities important to construct a FM recipient requiring just a couple of outside capacitors and a tuning circuit. Utilizing a basic dynamic RC channel made of just a solitary inductor, a couple of resistors and a varicap, this FM recipient will get show radio...

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AIRCRAFT RADIO COMMUNICATION RECEIVER

Aircraft Radio Communications Receiver The correspondences between business flying machine and the ground can be intriguing, interesting and once in a while notwithstanding exasperating. However radios that get the give or take 220MHz to 400MHz band regularly utilized for airplane (both military and business) are not effectively found. What's more, scanners can be entangled, extensive and extravagant. With a simple to fabricate circuit,...

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DIGITAL VOLUME CONTROL

Digital Volume Control This is the simple circuit  Part Total Qty. Description Substitutions C110.1uf Ceramic Disc Capacitor U11DS1669 Digital Pot IC (See Notes) S1, S22Momentary Push Button Switch MISC1Board, Wire, Socket For U1 NOTE : S1  volume up, S2 volume down. The input signal should not less than  -0.2 volts. Using a dual polariity power supply (+-5V works fine) will cure most clipping...

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FM TRANSMITTER

FM Transmitter Here is the schematic, PC board example, and parts position for a low controlled FM transmitter. The scope of the transmitter when running at 9V speaks the truth 300 feet. Running it from 12V expands the reach to around 400 feet. This transmitter ought not be utilized as a room or phone bug. Schematic Part Total Qty. Description Substitutions C110.001uf Disc Capacitor C215.6pf Disc Capacitor C3,C4210uf...

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3 WATT FM TRANSMITTER

3 Watt FM Transmitter This is the schematic for a FM transmitter with 3 to 3.5 W yield control that can be utilized somewhere around 90 and 110 MHz. In spite of the fact that the steadiness isn't so terrible, a PLL can be utilized on this circuit.  This is a circuit that I've construct a couple of years prior for a companion, who utilized it as a part of mix with the BLY88 speaker to acquire 20 W yield power. From the notes that I...

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CAR BATTERY CHAGER

Car Battery Charger This charger will rapidly and effectively charge most any lead corrosive battery. The charger conveys full current until the current drawn by the battery tumbles to 150 Mama. As of now, a lower voltage is connected to complete off and keep from over charging. At the point when the battery is completely charged, the circuit switches off and lights a Drove, letting you know that the cycle has wrapped up. Part Total...

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6V TO 12V CONVERTER

6V to 12V Converter This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example, you could run 12V car accessories in a 6V (British?) car. The circuit is simple, about 75% efficient and quite useful. By changing just a few components, you can also modify it for different voltages. Part Total Qty. Description Substitutions R1, R422.2K 1/4W Resistor R2, R324.7K 1/4W Resistor R511K 1/4W Resistor R611.5K 1/4W...

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12V SOLAR INVERTER BATTERY CHARGER

12V Solar Inverter Battery Charger Here is a vitality sparing sun oriented inverter battery charger. It gathers sunlight based vitality to recharge 12 volt inverter battery. It has auto slice off office to quit charging when the battery achieves full charge. The charger uses a 24 volt sunlight based board as info.  The circuit utilizes a variable voltage controller IC LM 317 to set the yield voltage enduring around 16 volts. Variable...

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CELL PHONE EMERGENCY CHARGER

Homemade Cell Phone Emergency Charger Pack Circuit It frequently happens, our wireless goes into a low battery condition right amidst a vital discussion, and much more dreadful it happens while we are voyaging or arranged in some remote open air area where there's no charging office accessible. Regardless, this little pack will give your mobile phone a quick refill each time it has a tendency to get level outside.  We all realize that...

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6V 4AH AUTOMATIC BATTERY CHARGER

Make a 6v 4ah Automatic Battery Charger Circuit without Using a Relay The following circuit shows a simple automatic 6 volt 4 to 10 AH battery charger circuit using a 12 volt relay.  The following circuit shows a simple automatic 6 volt 4 AH battery charger circuit without using a relay, rather directly through a transistor. Both the above circuits will perform equally well, however the upper circuit can be altered...

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FM BUG TRANSMITTERS

Spy Circuits - FM Bug Transmitters ADC0804 (pdf)  Easy to electronic converters find titanic application as a midway device to change over the signs from easy to cutting edge structure. These propelled signs are used for further get ready by the automated processors. Distinctive sensors like temperature, weight, power et cetera change over the physical qualities into electrical signs that are straightforward in nature.  ADC0804 is...

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INDUCTANCE METER

Inductance Meter Circuit The article discusses a simple yet accurate, wide range inductance meter circuit. The design utilizes only transistors as the main active components and a handful of inexpensive passive components. The proposed Inductance meter circuit can measure inductance or coil values accurately over the given ranges and as a bonus the circuit is also capable of measuring the complimentary capacitor values as accurately. The...

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