Showing posts with label simple. Show all posts
Showing posts with label simple. Show all posts
Thursday, August 15, 2013
Simple Cold Cathode Fluorescent Lamp Supply Circuit Diagram
Simple Cold-Cathode Fluorescent-Lamp Supply Circuit Diagram. For back-lit LCD displays, this supply will drive a lamp. LT1072 drives Ql and Q2, and a sine wave appears across CI. LI is a transformer that steps up this voltage to about 1400 V. Dl and D2 detect lamp current and form a feedback loop to the LT1072 to control lamp brightness. C1 = MUST BE A LOW LOSS CAPACITOR. METALIZED POLYCARB WIMA FPK 2 (GERMAN) RECOMMENDED. L1 = SUMIDA 6345-020 OR COILTRONIX CTX110092-1. PIN NUMBERS SHOWN FOR COILTRONIX UNIT. L2 = COILTRONIX CTX300-4 * = 1 % FILM RESISTOR.
Cold-Cathode Fluorescent-Lamp Supply Circuit Diagram
Monday, August 5, 2013
Simple Solar LED Lantern
This solar LED lantern can be used as an emergency light. Its 6V battery can be charged either from 230V, 50Hz AC mains or a 12V, 10W solar panel. Two LED indicators have been provided—red LED (LED1) indicates battery charging and green LED (LED2) indicates fully-charged battery.
You can choose to charge the battery either from the mains power or the solar panel by using the single-pole, double-throw (SPDT) switch. Capacitor C1 (1000µF, 35V) removes ripples from the power supply and regulator IC LM7809 (IC1) provides regulated 9V DC to the emitter of pnp transistor T1 (TIP127/BD140) and pin 7 of op-amp IC CA3140 (IC2), which is configured in comparator mode.
The reference voltage of 6.3V at pin 2 of IC2 is obtained through the combination of resistor R7 (1-kilo-ohm) and zener diode ZD1 (6.3V). The comparator controls charging of the battery. Pin 3 of IC2 is connected to the positive terminal of the battery to be charged through resistor R5. When the battery is fully charged, it stops charging and the green LED (LED2) glows to indicate the full-charge status.
When the battery voltage is low, diode D1 (1N4007) forward-biases and the battery connects (through resistor R3) to the collector of T1 for charging (indicated by the glowing of red LED1). Three high-wattage white LEDs (LED3 through LED5), such as KLHP3433 from Kwality Photonics, are used for lighting. These are switched on using switch S3.
You can choose to charge the battery either from the mains power or the solar panel by using the single-pole, double-throw (SPDT) switch. Capacitor C1 (1000µF, 35V) removes ripples from the power supply and regulator IC LM7809 (IC1) provides regulated 9V DC to the emitter of pnp transistor T1 (TIP127/BD140) and pin 7 of op-amp IC CA3140 (IC2), which is configured in comparator mode.
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When the battery voltage is low, diode D1 (1N4007) forward-biases and the battery connects (through resistor R3) to the collector of T1 for charging (indicated by the glowing of red LED1). Three high-wattage white LEDs (LED3 through LED5), such as KLHP3433 from Kwality Photonics, are used for lighting. These are switched on using switch S3.
Saturday, August 3, 2013
Simple Cell Phone Jammer Circuit Diagram 2
A beautiful diy gsm jammer or mobile cell phone jammer schematic diagram for use only in GSM1900 with frequency from 1930 MHz to 1990 MHz. The GSM1900 mobile phone network is used by USA, Canada and most of the countries in South America.
This cell phone jammier is not applicable for use in Europe, Middle East, nor Asia. The GSM jammier circuit could block mobile phone signals which works on GSM1900 band, also called DCS. For more cell phone jammers check the related posts.
Mobile cellphone jammer circuit diagram
Tuesday, June 4, 2013
Subwoofer Wiring Diagram Simple
Subwoofer Speaker Wiring Diagram Subwoofer Review.
How Do I Wire My Amp To A Sub Faqs Polk Audio.
Click Here To Download The Swan Wiring Floor Plan Pdf.
Breitbandtreiber Integrierter Subwoofer Downfired Woofer Bi Wiring.
Subwoofer And Avr Speaker Level Input Output Connection.
Customized The Wiring To Allow For Removal Of The Speaker With Ease.
Sony Xs 4624 Coaxial 2 Way Speaker Subwoofer Wiring Diagram And Cable.
Subwoofer Wiring Diagram Made Simple.
Amplifier Types 2 Channel 4 Channel Mono Multi Channel Amps.
Car Audio Capacitor Installation.
Friday, April 12, 2013
Simple Rain Alarm or Water Detector Circuit with SCR 106CY
Rain detector circuit may also be utilized to the challenge or any other pastime, rnwhich is so easy principles.When it rains plate (sensor) will receive rnrain. And a faithful work has paid to SCR1 and go with the flow preserve watch over Buzzer rnnoise.
Electronic Part List
R1 1K 1/4 W Resistor
R2 680 Ohm 1/4 W Resistor
D1 1N4001 Silicon Diode
BZ1 12V Buzzer
S1 SPST Switch
SCR1 C106B1 SCR 106CY
SENSOR See
Notes
Thern sensor is a small piece of PC board etched to the pattern showen in thern schematic. The hints must be very shut to every other, however with the aid of no indicates rntouching. A big spiral pattern would additionally work. 2. Make sure to make use of arn loud buzzer
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Electronic Part List
R1 1K 1/4 W Resistor
R2 680 Ohm 1/4 W Resistor
D1 1N4001 Silicon Diode
BZ1 12V Buzzer
S1 SPST Switch
SCR1 C106B1 SCR 106CY
SENSOR See
Notes
Thern sensor is a small piece of PC board etched to the pattern showen in thern schematic. The hints must be very shut to every other, however with the aid of no indicates rntouching. A big spiral pattern would additionally work. 2. Make sure to make use of arn loud buzzer
Simple Oscillator Pipe Locator
Sometimes the need arises to construct a really simple oscillator. This could hardly be simpler than the circuit shown here, which uses just three components, and offers five separate octaves, beginning around Middle C (Stage 14). Octave # 5 is missing, due to the famous (or infamous) missing Stage 11 of the 4060B IC. We might call this a Colpitts ‘L’ oscillator, without the ‘C’. Due to the reactance of the 100-µH inductor and the propagation delay of the internal oscillator, oscillation is set up around 5 MHz. When this is divided down, Stage 14 approaches the frequency of Middle C (Middle C = 261.626 Hz). Stages 13, 12, 10, and 9 provide higher octaves, with Stages 8 to 4 being in the region of ultrasound.
Simple Oscillator/Pipe Locator Circuit Diagram
If the oscillator’s output is taken to the aerial of a Medium Wave Radio, L1 may serve as the search coil of a Pipe Locator, with a range of about 50 mm. This is tuned by finding a suitable hetero-dyne (beat note) on the medium wave band. In that case, piezo sounder Bz1 is omitted. The Simple Oscillator / Pipe Locator draws around 7 mA from a 9-12 V DC source.
Source: http://www.ecircuitslab.com/2012/05/simple-oscillator-pipe-locator.html
Thursday, April 11, 2013
Simple LED Voltmeter
Four µ741 op-amps are used here to measure the voltage ranging from 3V to 12V DC. The voltage measured is displayed on eight LEDs.
The inverting inputs (pin 2) of IC1 through IC4 are supplied with regulated 12V DC through voltage dividers R1 through R4. So the inverting input of each op-amp forms the reference voltage. The non-inverting inputs (pin 3) of the op-amps are tied together and connected to the input terminals. The voltage to be meaured is fed to these input terminals.
When the input voltage exceeds the reference voltage of any of the op-amps, its output goes high, making the corresponding LEDs to glow.
This circuit is designed to measure 3V, 6V, 9V and 12V DC. For instance, when the input voltage is 3V, LED7 and LED8 glow. When the input voltage is 12V, all the LEDs glow.
Note. You can use a quad device such as LM324 instead of µ741 ICs.
Circuit Diagram:
The inverting inputs (pin 2) of IC1 through IC4 are supplied with regulated 12V DC through voltage dividers R1 through R4. So the inverting input of each op-amp forms the reference voltage. The non-inverting inputs (pin 3) of the op-amps are tied together and connected to the input terminals. The voltage to be meaured is fed to these input terminals.
When the input voltage exceeds the reference voltage of any of the op-amps, its output goes high, making the corresponding LEDs to glow.
This circuit is designed to measure 3V, 6V, 9V and 12V DC. For instance, when the input voltage is 3V, LED7 and LED8 glow. When the input voltage is 12V, all the LEDs glow.
Note. You can use a quad device such as LM324 instead of µ741 ICs.
Circuit Diagram:
Simple 30V Variable Power Supply Using LM317
This 30v variable power supply circuit is based on LM317 voltage regulator circuit . This LM317 30v variable power supply circuit can deliver high current (around 5 amps) and variable output voltage between 1.2 volts, up to 30 volts. The led D3 mounted on pin 6 at lm301 lights in constant current mode .
Circuit diagram
Circuit diagram
Current limit can be adjusted using R2 potentiometer and the output voltage can be adjusted from 1.2 volts to 30 volts using R8 potentiometer . Input voltage for this variable power supply must be around 35 volts .For this power supply circuit you need to use LM317K circuit (in to3 package ) which must be mounted on a heatsink .
Wednesday, April 10, 2013
Simple 220V SMPS Buck Converter Circuit Using VIPer12A IC
The presented article explains a simple buck converter or an SMPS circuit using the IC VIPer12A from STMicroelectronics. The circuit uses negligible number of external components yet is able to operate directly from mains AC input.
Looking at the given circuit diagram we see that the input stage incorporates a surge limiting resistor which quite acts like a fuse, a diode for rectifying the AC, and an LC filter network for further filtration of the DC riples.
The LC filter employed here ensures better DC stabilization and enhanced EMI response.
The capacitor Cin1 may be introduced for further reinforcing the EMI functionality.
The IC VIPer12A becomes the main PWM processor device which single handedly performs the entire buck conversion in the circuit.
The main specifications of the configuration may be understood as follows:
- AC input voltage Vinac 80 - 285Vac
- Output current Iout 30mA
- Output current Iout2 50mA
- Output voltage Vout1 +24±10%V
- Output voltage Vout2 +5V±5%
- Switching frequency 60 kHz
- Output Power ~ 1W
The circuit facilitates two outputs, rhe 24V output is achieved through a buck converter configuration while the 5V output via fly back mode.
The feedback voltage to the IC is acquired from Vout1 for the required regulation of the output, this supply is also applied to the IC Vdd pin.
The above wiring becomes possible by using a single high voltage diode and just one capacitor, to be precise D1 and C3, making the connections and costing much simpler.
The employed inductor L consists of two windings which are coupled across with each other over a common ferrite core.
The winding are done through appropriate turn ratios, where N1 = 200 turns and N2 = 60 turns. Both these are wound over a PANASONIC ELC10D152E ferrite core material.
Zener diodes z1 and z2 are installed in order to safeguard the outputs against over voltages.
A dummy load resistor is fixed across Vout1 so that appropriate regulation can be executed over both the outputs during open load situations.
Though the addition of the above resistor affects the efficiency a bit, it superbly improves voltage regulation response of the circuit.
The rectifier diodes fixed at the output are fast response fast recovery types. D1 is a high voltage diode as it might be subjected to high reverse voltages delivered by the DC bus voltage...... D2 is a normal diode.
Parts List for the proposed simple SMPS buck converter circuit:
Rr 10W 1/2W
Rf 10KW 1/4W
Rburden 4.7kW 1/4W
Cin 4.7 μF, 450V Electrolytic Capacitor
C1 33 μF, 50V Electrolytic Capacitor
C2 100 μF, 16V Electrolytic Capacitor
C3 1 μF, 25V Electrolytic Capacitor
C4 22 nF Ceramic capacitor
Dr Diode 1N4007
D1 Diode BA159 (fast)
D2 Diode 1N4148 (fast)
D3 Diode 1N4004
Dz 22V Zener
Dz1 27V Zener
Dz2 5.6V Zener
L 1.5 mH
Lf 470 μH Inductor
IC1 STMicroelectronics VIPer12ADIP
PCB Design and Component Layout of the above explained SMPS buck converter circuit using IC VIPer12A
Simple Sound Activated Switch
Control by sound may be very useful, not just on a robot but also for a bit of home automation, for example a sound activated light responding to a knock on the door or a hand clap. The light will be automatically switched off after a few seconds. An alternative use is burglar protection — if someone wants to open the door or break some-thing the light will come on, suggesting that someone’s at home. The circuit can work from any 5– 12 VDC regulated power supply pro-vided a relay with the suitable coil voltage is used.
Sound Activated Switch Circuit Diagram
When you first connect the supply voltage to the circuit, the relay will be energised because of the effect of capacitor C2. Allow a few seconds for the relay to be switched off. You can increase or decrease the ‘on’ period by changing the value of C2. A higher value results in a longer ‘on’ period, and vice versa. Do not use a value greater than 47 µF. Biasing resistor R1 determines to a large extent the microphone sensitivity. An electret microphone usually has one internal FET inside which requires a bias voltage to operate. The optimum bias level for response to sound has to be found by trial and error.
All relevant electrical safety precautions should be observed when connecting mains powered loads to the relay contacts.
http://streampowers.blogspot.com/2012/06/simple-sound-activated-switch.html
Monday, April 8, 2013
Simple 3 Transistor Amplifier
Mini 3 transistor amplifier is a simple amplifier with 50mW power drawn by 3 transitor. The series of three mini-amplifier transistors can be used for loud speaker 8 ohm load. Source voltage required to activate the mini-amplifier can be drawn from the batteries 9V.Rangkaian 3 transistor amplifier is often used in simple portabe audio devices such as radios or small tape recorder. Mini-transistor amplifier circuit 3 is quite simple as shown in the figure below.
Mini-transistor amplifier circuit 3 includes type of amplifier OTL (Output Transformer Less). Mini-transistor amplifier circuit 3 is used for output coupling capacitors. Amplifier circuit is simple and suitable when used for audio amplifier experiment.
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Mini-transistor amplifier circuit 3 includes type of amplifier OTL (Output Transformer Less). Mini-transistor amplifier circuit 3 is used for output coupling capacitors. Amplifier circuit is simple and suitable when used for audio amplifier experiment.
Thursday, April 4, 2013
How to Make a Simple Peltier Refrigerator at Home
The application of voltage instantly starts transforming one surface of the unit hot and the reverse surface cool very fast.
However, the hot end must be quickly managed so that the heat does not reach higher levels, which can completely hamper the heating and cooling process and ruin the device itself.
Therefore the hot surface must be attached with heavy heatsinking materials like aluminum or copper metal of suitable sizes.The simple construction of a simple peltier refrigerator shown in the figure demonstrates the above discussed set up where two such devices are appropriately fixed with aluminum plates for radiating different degrees of temperatures from their relevant sides.
The plates responsible for generating the cooling effects must be trapped inside a well insulated enclosure made up of thermocole or polyurethane foam etc.
The inside chamber may be used for storing water bottles or water packets as desired.
The hot heatsinked surfaces must be exposed in the outside air for radiations and for controlling the temperatures of "hot" ends of the unit, see figure.
However, the hot end must be quickly managed so that the heat does not reach higher levels, which can completely hamper the heating and cooling process and ruin the device itself.
Therefore the hot surface must be attached with heavy heatsinking materials like aluminum or copper metal of suitable sizes.The simple construction of a simple peltier refrigerator shown in the figure demonstrates the above discussed set up where two such devices are appropriately fixed with aluminum plates for radiating different degrees of temperatures from their relevant sides.
The plates responsible for generating the cooling effects must be trapped inside a well insulated enclosure made up of thermocole or polyurethane foam etc.
The inside chamber may be used for storing water bottles or water packets as desired.
The hot heatsinked surfaces must be exposed in the outside air for radiations and for controlling the temperatures of "hot" ends of the unit, see figure.
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