Showing posts with label with. Show all posts
Showing posts with label with. Show all posts
Wednesday, November 19, 2014
Power Supply with tube
Power supply with Z2C tubes are designed specifically to provide power supply voltage to the EL-34 tube amplifier push-pull in the previous article. Power supply with Z2C tube to tube power amplifier is made with a tube rectifier Z2C. Just as the power supply for power amplifier tube earlier, power supply also uses a filter 3 levels with kapsitor electrolyte. Circuit power supply with tube rectifier Z2C can give +210 VDC output voltage. A complete range of power supply for power amplifier tube can be seen in thethe following figure .
| Power Supply with tube |
Z2C on the rectifier tube in power supply with tube above require a supply voltage for the filaments taken from the other side of the transformer secondary. Power supply with Z2C tube is a power supply that dapt used as a substitute power supply for power amplifier tubes .
Monday, November 17, 2014
Quad Audio Amplifier Circuit diagram with TDA7831 4×25W
The afterward is a cloister amplifier circuit (amplifier with four inputs and four outputs) based TDA7381. This amplifier is advised for car audio system, but you can additionally use this ambit for added purposes. This ambit has a architecture actual simple and actual accessible to build.
Sunday, November 16, 2014
50W AF Power Amplifier with STK4036II Schematic Circuit
• Compact package for thin-type audio sets
• Member of pin-compatible series with outputs of 20 to 200W
• Easy heatsink design to disperse heat generated in thintype stereo sets
• Constant-current circuit to reduce supply switch-on and switch-off shock noise • External supply switch-on and switch-off shock noise muting, load short-circuit protection, thermal shutdown and other circuits can be tailor-designed.
Battery backup converter with one NiCd cell
Notebook computers and added carriageable accessories generally use a advancement array to absorb anamnesis accommodation during advancement of the capital battery. Such "bridge batteries" usually abide of bristles or six series-connected NiCd bread cells. Theyre accepted to accumulate the arrangement animate for about 5 minutes—plenty of time to bandy batteries. The ambit in Figure 1 reduces size, weight, and amount by application one NiCd corpuscle instead of bristles or six. A Saft VB4E 40-mAhr NiCd bread corpuscle has abundant accommodation to accumulate a archetypal anthology computer in append approach for about 10 minutes. All apparatus (excluding the bread cell) absorb beneath than 1/2 in.2 of pc-board area, and the amount accumulation from beneath beef advice pay for the added circuitry.
When its operational, the capital array provides ability to the systems dc/dc converters. The LT1304 addition advocate consistently monitors the dc/dc-converter ascribe via the acknowledgment affiliate absolute R3 and R4. Once the FB pin drops beneath 1.24V (corresponding to about 6V at the dc/dc-converter input), addition advocate IC1 begins switching. Accepted comes from B1, through L1, and into the SW pin on IC1. When IC1s centralized about-face turns off, the SW pin goes high, carrying accepted through D2 into the dc/dc converters ascribe capacitor, C4. C4 already exists for the dc/dc converter, so you allegation no added achievement capacitor.
The LT1304 switches at about 200 kHz; thus, L1 can be small. Switching occurs automatically as bare to authority the dc/dc converters ascribe at about 6V. Ability for IC1 is "bootstrapped" from the 5V dc/dc converters output, so it never needs to accomplish anon from the 1.2V NiCd bread cell. Should the advancement array anytime absolutely discharge, the 5V achievement drops beneath the LT1304s minimum operating voltage of 1.5V, and the absolute arrangement shuts down. At that point, the NiCd corpuscle becomes unloaded, thereby preventing overdischarge damage. Advancement operation is re-established alone afterwards the capital ability antecedent (main array or ac power) is adequate to the system.
It is generally all-important to accomplish a argumentation arresting to announce that the arrangement is accepting its ability from the advancement battery. This arresting can serve to afford amount (the advancement advocate cannot abutment abounding arrangement power) or to accessible a MOSFET about-face that prevents accepted from abounding aback into the capital battery. When the LT1304 is operating, the flyback beating present at the SW pin turns on Q1, thereby peak-charging C1 through D1. Once the voltage on pin 1 exceeds 1.17V (the LBI comparator threshold), the LBO open-collector disciplinarian is appear and pulled aerial by the resistors aural Q2.
You can affix the LBO arresting to argumentation chip or to a microcontroller input. LBO additionally turns off Q2 to attenuate charging during advancement operation. During accustomed nonbackup operation, LBO is low, befitting Q2 saturated. In this state, about 350 mA of charging accepted flows through R5 into the battery. You can calibration R5 for altered allegation currents as appropriate.
Thursday, November 13, 2014
ic 7805 based 5V breadboard mini PSU circuit
Micro PSU to power a breadboard with 5 volts. Connect to 9V battery, 12V or any other DC powersource from 8 to 18 volts. Follow the instructions on the site below to build your own mini 5V power supply.
Source:http://www.instructables.com/id/5V-breadboard-mini-PSU/?ALLSTEPS
Thank you.
Monday, November 3, 2014
12 V AUDIO AMPLIFIER WITH TRANSISTOR ELECTRONIC DIAGRAM
12 V AUDIO AMPLIFIER WITH TRANSISTOR ELECTRONIC DIAGRAM
List Component
- P1_____________10K Log.Potentiometer
- R1,R2__________33K 1/4W Resistors
- R3_____________33R 1/4W Resistor
- R4_____________15K 1/4W Resistor
- R5,R6___________1K 1/4W Resistors
- R7____________680R 1/4W Resistor
- R8____________120R 1/2W Resistor
- R9____________100R 1/2W Trimmer Cermet
- C1,C2__________10µF 63V Electrolytic Capacitors
- C3____________100µF 25V Electrolytic Capacitor
- C4,C7_________470µF 25V Electrolytic Capacitors
- C5_____________47pF 63V Ceramic Capacitor
- C6____________220nF 63V Polyester Capacitor
- C8___________1000µF 25V Electrolytic Capacitor
- D1___________1N4148 75V 150mA Diode
- Q1____________BC560C 45V 100mA PNP Low noise High gain Transistor
- Q2____________BC337 45V 800mA NPN Transistor
- Q3____________TIP31A 60V 4A NPN Transistor
- Q4 ___________TIP32A 60V 4A PNP Transistor
- SW1___________SPST switch
Saturday, November 1, 2014
General DC Power Supply with uA723 This is the power supply circuit for general purpose usage General Power Supply with uA723 circuit diagram The s
General DC Power Supply with uA723
The supply can be used for supply output voltages from 1 to 35V. The line transformer should be selected to give about 1.4 times the desired output voltage from the positif side of filted capacitor C1 to ground. Potensiometer R2 sets the output voltage to the desired value by adjusting the reference input. Rsc is the current limit set resistor.
For example, if the maximum current output is to be 1A, Rsc=0.65/1.0 = 0.65 Ohm. The 1KOhm resistor,R5, is a light-loaded resistor designed to improve the no-load stability of the supply.
Friday, October 31, 2014
24V DC Powered Beeper with 4 Separate Inputs
24 Volt DC is a very prevalent voltage used fashionable developed settings. This hobby circuit lower was designed to acknowledge four unlike 24v DC alarm input signals, which are followed by used to drive a single low power beeper. The beeper is a magnetic type with its own oscillator/driver. The four diodes form an “or else” gate so one solitary of the four inputs want cause the beeper to produce blast. A CMOS version of the widely held 555 timer is used to strobe the beeper on and rancid on something like 1Hz.
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| 24V DC Powered Beeper with 4 Separate Inputs Circuit Schematic Diagram |
Tuesday, October 28, 2014
IC TDA7294 50W Power Amplifier with Diagram Circuit
This is a great audio amplifier circuit based on single power IC TDA7294. TDA7294 is intended for use as a high quality audio class AB amplifier in hi-fi applications. It has very low noise and distortion, wide bandwidth and good output current capability, enabling it to supply high power into both 4Ω and 8Ω loads. It has both short circuit and thermal protection, so is quite robust.
Component part list:
R1_____________ 150R R2, R3, R5_____ 10K R4_____________ 680R R6_____________ 22K IC1____________ TDA 7294 Heatsink | C1____________ 1u5F or 1u C2____________ 2n7F C3, C6________ 22uF 63V C4, C5________ 10uF 63V C7, C9________ 2200uF 50V C8, C10_______ 100nF |
With the addition of a handful of parts and a suitable power supply, this module will deliver over 50W RMS into 4 or 8 ohms with <0.1% total harmonic distortion (thd) and <0.1% intermodulation distortion (imd). a similar circuit was published in elektor magazine, 11/96.
It is also suitable as a replacement power amp stage, or upgrade for many existing amplifiers of between 30W-50W, provided they have a suitable dual supply, and most do.
Saturday, October 25, 2014
How To Build Regulated Power Supply with Stability at 3A
The circuit was designed to build a Regulated Power Supply with Stability at 3A will provide a regulated voltage from 40 V to 70 V in a 3 A current.
- 2N3055 – a complementary Silicon Epitaxial-Base planar NPN transistor mounted in Jedec TO-3 metal case for use as power transistor.
- BD243 – an epitaxial-base Silicon NPN transistor intended for wide variety of high speed switching and power amplifier applications such as series and shunt regulators, and driver and output stages of high-fidelity amplifiers.
- BC303 – a PNP silicon planar epitaxial transistor used for AF drivers & outputs, for AF medium power amplifiers, and for switching applications up to 1 A.
There are times when some applications are requiring a regulated power supply that has relatively high output voltage and stability. All of these features are being attained in the design of this circuit. The voltage output of the circuit can range from 40 V up to 60 V while carrying a current of 3 A while providing stabilization. The construction of the circuit is very simple since the components used were available easily in the market. The only thing that matters is how the connection will be ensured.
During the operation, when the circuit is delivering 50 V up to 60 V, the transistor Q1 will be hot enough and would require a large heatsink. For voltage output higher than 50 V up to 70 V, the stability of the circuit may be found unsatisfactory. This is the reason why the ideal output voltage of the circuit is 45 V up to 60 V. In order to alter the output voltage from 40 V up to 70 V, a 470 Ohms potentiometer RV1 is used for the adjustments. However, the potentiometer may also be replaced by two constant resistors with suitable values when the circuit adjustment has been done. This is due to the fact that the use of a potentiometer may lead to a 3 V of over voltage.
As a reminder, the positive output of the circuit should be connected at point A while the 0 V output should be connected at point B. The 0 V reference should not be connected to the ground for the circuit to function properly. the use of this 3 A power supply with an average of 50 V circuit may be found on various applications that normally requires this rating.
Since this type of circuit is easily built, it is being utilized in industrial, educational, clinical, and laboratory facilities. It may come with different additional features such as reduced ripple & noise, overload protection, and short circuit & high current protection.
Since this type of circuit is easily built, it is being utilized in industrial, educational, clinical, and laboratory facilities. It may come with different additional features such as reduced ripple & noise, overload protection, and short circuit & high current protection.
Friday, October 24, 2014
Police Sirine Circuit with IC 555
The series of police sirens with 555 ic this is a series of sirens that utilizes two IC 555 as a pulse generator and producing shrill voice.
Both ic 555 respectively build the astable multivibrator circuit and generate output signals with different frequencies. It is intended to be used as one of the high frequency generator or a screeching sound and the other as a regulator of the swing from last shrill voice. If we observe the working principle of this circuit is very similar to a series of modulation fm. Where the shrill sound signal likened to a high frequency signal from the oscillator circuit and control signal swing is the wail of the information signal or input signals that will transmit. This is consistent with the shape of the output signal associated with the loudspeaker, which has an output signal frequency changes in the form of regular meetings wave tenuous.
Actually a series of sirens could be simpler than if you use a 556 IC which is a dual multivibrator or equal to two pieces of IC 555. IC 556 has two multivibrator circuit menfaatkan so you can meet the workflow of this siren sound-producing circuit. Or you can also make it by using a combination of multiple transistors. And it could be you do remember the oscillator circuit can be easily made with transistors.
Appropriate image above then:
R1, R2, and C1 is a determinant of the frequency of the signal generated by IC1
R3, R4 and C3 is a determinant of the signal frequency whine
Signals generated by IC1 IC2 pin 5 connected to the control signals intended for the resulting shrieks
Screeching sound signal will swing to follow the control of the output signal IC1
You can do experiments in order to gain more understanding of police sirens this circuit by changing the value of some critical components such as the frequency of R1, R2, R3, R4, C1 and C3.
Thursday, October 23, 2014
VFO circuit Diagram with Varicap
The most difficult to build an oscillator VFO (in Portuguese OFV variable frequency oscillator) is to get him to have a good frequency stability, for it must feed the VFO with a source of good quality, make the short connections and shielding in a box metal.
This circuit operates up to 10 MHz frequency and can be used for testing since it is quite simple. In this project VFO is used 1N4001 rectifier diode common that can work as a varicap when polarized in reverse. The coil L1 is formed by 80 turns of 28 AWG wire on a ferrite rod 1 centimeter in diameter. For the RF transistor may be a transistor used BF494.
VFO circuit Diagram with Varicap
Wednesday, October 22, 2014
Signal Generator with 555 Circuit Diagram
This is another wonderful circuit based on IC 555, although this simple signal generator is capable of generating square wave signals, sine and sawtooth, and an adjustment of the output level. This signal generator uses besides IC 555 transistor BC 547B and two and a half dozen basic components such as resistors and capacitors.
Signal Generator with 555 Circuit Diagram
Monday, October 20, 2014
Simple Solar Cell Array Charger with Regulator
Solar Cell Array Charger with Regulator circuit can be used to charge batteries from a solar cell array. The circuit consists of an oscillator, a DC-DC step-up or ‘boost’ converter and a regulator that pro-vides regulation of the output voltage.The oscillator is built around a hex Schmitt trigger inverter IC, the 40106B, one resistor, R1, inserted between the input and the output of one of the gates in the 40106 to supply charge to C3. Depending on the values of resistor R1 and capacitor C3 you’re using in the circuit, the oscillator will operate at different frequencies, but a frequency below 100 kHz is recommended.
By consequence, the oscillator frequency should not exceed the maximum ripple frequency of capacitor C2 connected on the output. C2 should be an electrolytic capacitor with a DC working voltage larger than the desired output voltage. Besides, it should have a low ESR (equivalent series resistance).
Solar Cell Array Charger with Regulator Circuit Diagram :
IC1A is used as a buffer, ensuring that the oscillator sees a light, fairly constant load and so guaranteeing that the output frequency remains stable (within limits, of course). VCC of the Schmitt trigger can be connected directly to the battery charged, provided the charged batter y voltage does not exceed the max. or min. limits of the Schmitt trigger’s supply voltage. This ensures the Schmitt trigger can operate even if little power is obtained from the solar cell array.
When transistor T2 is turned on, (output from oscillator buffer IC1A is high), a collector current flows through inductor L1 which stores the energy as a magnetic field and creates a negative voltage VL1. When transistor T2 is switched off, (output from oscillator buffer IC1A is low), the negative voltage VL1 switches polarity and adds to the voltage from the solar cell array. Consequently, current will now flow trough the inductor coil L1 via diode D1 to the load (capacitor C2 and possibly the battery), irrespective of the output voltage level.
Capacitor C2 and/or the battery will then be charged. So, in the steady state the out-put voltage is higher than the input voltage and the coil voltage VL1 is negative, which leads to a linear drop in the current flowing through the coil. In this phase, energy is again transferred from the coils to the out-put. Transistor T2 is turned on again and the process is repeated. A type BC337 (or 2N2222) is suggested for T2 as it achieves a high switching frequency. Inductor L1 should have a saturation current larger than the peak current; have a core material like ferrite (i.e. high-frequency) and low-resistance. Diode D1 should be able to sustain a forward current larger than the maxi-mum anticipated current from the source. It should also exhibit a small forward drop and a reverse voltage spec that’s higher than the output voltage. If you can find an equivalent Schottky diode in the junk box, do feel free to use it.
The most important function of the shunt regulator around T1 is to protect the batteries from taking damage due to overcharging. Besides, it allows the output voltage to be regulated. Low-value resistor R3 is switched in parallel with the solar cell array by T1 so that the current from the solar cell array flows through it. Zener diode D2 is of course essential in this circuit as its zener voltage limits the output voltage when T1 should be turned on, connecting the solar cell array to ground via R3. In this way, there is no input voltage to the boost converter and the battery cannot be overcharged.
Sealed lead-acid (SLA) batteries with a liquid electrolyte produce gas when over-charged, which can ultimately result in damage to the battery. So, it’s important to choose the right value for zener diode D2. Special lead-acid batteries for solar use are available, with improved charge-discharge cycle reliability and lower self-discharge than commercially-available automotive batteries.
Finally, never measure directly on the out-put without a load connected the ripple current can damage your voltmeter (unless it’s a 1948 AVO mk2). Link
Photo Detector with TTL Output Circuit Diagram
This is a photo detector, a detector with TTL output light that can be used in projects for Arduino. This circuit offers low output level when there is enough light, or a light that triggers the system. He can give a command, for example, turn on the lights when it gets dark and off when clear. The output is compatible with TTL level and gives low (LO) when Q1 phototransistor detects light. RV1 with a trimpot, we can adjust the sensitivity.
Photo Detector with TTL Output Circuit Diagram
Parts List
R1 = 270 Ohm
R2-5 = 1K ohm
R3 = 10K ohm
R4 = 100 ohm
RV1 = 10K ohm
Q1 = BP103 Siemens Phototransistor
IC1 CA3130
C1-2 = 100V 100nF ceramic
IC2 = 74HCT13
D1 = 1N4148-2
Photo Detector with TTL Output Circuit Diagram
Parts List
R1 = 270 Ohm
R2-5 = 1K ohm
R3 = 10K ohm
R4 = 100 ohm
RV1 = 10K ohm
Q1 = BP103 Siemens Phototransistor
IC1 CA3130
C1-2 = 100V 100nF ceramic
IC2 = 74HCT13
D1 = 1N4148-2
Modded PC Inspired With Frank Lloyd Wright
You think you already see all the possible case mods? This mod was inspired by the work of the famous Fallingwater architect Frank Lloyd Wright.
The inspired drink bar cantilevered roofs from teak, mahogany highlights, the Cherokee red and covered wagon code colors it is enough to architecture nerd powerlessness. Its fine styling sports has an Intel Core i7-875 GB on Mini-ITX motherboard, with 8 GB of system memory. It has a 256 GB SSD with a 2 TB hard drive.
This desktop cases don’t really tend to get hot, just the components and definitely wouldnt be worried about a fire-hazard. The top looks like it has pretty good airflow too.
Source by : http://www.extremecircuits.net/2012/08/modded-pc-inspired-frank-lloyd-wright.html
Saturday, October 18, 2014
Simple Bar Display With Alarm Flasher Schematic
Hello Freinds ! Here designed SIMPLE BAR DISPLAY WITH ALARM FLASHER . Schematic: Return to Display Circuits. By using two switching transistors and two LEDs, this circuit can distinguish low-level ac and dc signals. If the red LED illuminates, the signal is positive dc. If the yellow LED lights, the signal is negative dc. If the signal is ac, both LEDs will light.
Circuit Schematic
Thursday, October 9, 2014
Light to Frequency converter circuit
The circuit is based on TLC555, the CMOS version of famous timer IC NE 555. A photo diode is used for sensing the light intensity.The timer IC is wired in astable mode.The leakage current of the reverse biased photo diode is proportional to the light intensity falling on it.This leakage current charges the capacitance C1.When the capacitor voltage reaches 2/3 of the supply voltage the out put (pin 3) goes low.As a result the capacitor discharges through photo diode .When the capacitor voltage reaches 1/3 the supply voltage the out put (pin 3) of IC goes high.This cycling continues and we get a frequency at pin 3 proportional to the light intensity falling on the photo diode. ![Light]()
Read More..
Light to Frequency Converter Circuit Diagram & Parts List.
Light to Frequency Converter Circuit Diagram
Notes.
- With the given components the frequency varies from 1KHZ @ complete darkness to 24 Khz @ bright sunlight.The frequency range can be changed by using different values for C1.
- Use any general purpose photo diode for D1.
Sunday, September 21, 2014
Power Supply with principle of UPS
For UPS Power Supply circuit consists of lowering the voltage, rectifier, charger, batery and regulators. The technique is applied from UPS on the power supply is the use of batery and charger is connected dengang direct coupling with a series diode. For more details can be seen with the following image.
Thursday, September 18, 2014
STK4050 Audio Amplifier with 200W Output
The project is based around the hybrid integrated circuit STK4050 manufactured by Sanyo to build a low noise mono audio amplifier with complete high quality. The project has a maximum output power of 200W while incorporating a volume control. The power supply used in the circuit is an on-board type and because of this, only a center tapped transformer is needed for the powering of the circuit. The sound has a very good quality and it can be proven when used in home theaters, in computers, and other audio equipments which can also be used as subwoofer amplifier. For thin-type audio sets, it can be considered as a compact package.
The heat generated in thin-type audio sets is being dispersed easily with a good heatsink design. There may be case where a shock noise may be encountered especially during switch ON and switch OFF. This can be reduced by providing a constant current circuit. The design of the circuit can be tailored for reducing occurrence of thermal shutdown, short circuit protection for loads, shock noise muting from external power supply. The load resistance should have 8 Ohms value with 55K Ohms input impedance.
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