Showing posts with label 2. Show all posts
Showing posts with label 2. Show all posts
Monday, November 3, 2014
TRANSISTOR TESTER 2
TRANSISTOR TESTER - 2
Here is another transistor tester.
This is basically a high gain amplifier with feedback that causes the LED to flash at a rate determined by the 10u and 330k resistor.
Remove one of the transistors and insert the unknown transistor. When it is NPN with the pins as shown in the photo, the LED will flash. To turn the unit off, remove one of the transistors.
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Here is another transistor tester.
This is basically a high gain amplifier with feedback that causes the LED to flash at a rate determined by the 10u and 330k resistor.
Remove one of the transistors and insert the unknown transistor. When it is NPN with the pins as shown in the photo, the LED will flash. To turn the unit off, remove one of the transistors.
Monday, October 27, 2014
TA8210AH 2 x 22W BTL Car Amplifier Circuit
This is a circuit of 2 x 22 watt BTL amplifier using IC TA8210AH. It is not only an auto amplifier, ideal for a low-frequency auditory approach those hi-fi, with a very good linear feature. Can be fueled by a 12 volt car battery but shi from a 12 volt charger. The chip incorporates four bridge amplifiers available in two by two in order to ensure the output 22 watts per channel on 4 ohms.
TA8210AH - 2 x 22W BTL Car Power Amplifier CircuitNote:
- IC TA8210AH must be connected to a heat sink. A computer cabinet fan can also be used in addition.
- The circuit roughly draws 6A current at 18 V at full volume.So the power supply must be any thing more than 6A.
- Peak supply voltage (0.2s): 50 V
- supply voltage VCC (DC): 25 V
- Operating supply voltage VCC (opr): 18 V
- Output current (peak): 9 A
- Power dissipation PD: 50 W
- Operating temperature: 30~85 °C
- Storage temperature: 55~150 °C
C1,C2 : 4,7uF/35V
C3,C7 : 47uF/35V
C4 : 220uF/35
C5,C6 : 1nF
C8,C10,C11,C12 : 0,1uF/35V
C9 : 2200uf/35V
IC : TA8210AH/AL
HL1 : LED
R1 : 2 k
R2,R2,R3,R4,R5 : 2,2 Ohm
Sunday, October 5, 2014
9 Volt 2 Amp PSU Single IC Regulator Power Supply
Notes
There is little to be said about this circuit. All the assignment is done by the regulator. The 78S09 can bear up to 2 amps connected achievement whilst advancement a low babble and actual able-bodied adapted supply.
The ambit will assignment after the added components, but for about-face polarity aegis a 1N5400 diode is provided at the input, added cutting actuality provided by C1. The achievement date includes C2 for added filtering, if powering a argumentation ambit than a 100nF capacitor is additionally adorable to abolish any aerial abundance switching noise.
Saturday, October 4, 2014
Simple LED Flasher with 2 Transistor
This is LED Flasher circuit that is built using 2 transistors. Many other NPN transistor have a small signal or switching transistors can be used, such as 2N4401, PN2222 or 2N2222 using the circuit on the left figure. The circuit can also be inverted using PNP transistors such as 2N3906, 2N4403, PN2907, or 2N2907 as shown to the right. This is the figure of the simple LED Flasher circuit;
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The 470 ohm resistors determine the LED brightness. Lower resistance means higher current, and more light. LEDs that require more current or have a higher operating voltage (such as green and yellow) may work better with 300 ohms. The RC time constant of the 39K ohms resistor and the 10uF capacitor determines the on time for each side. (The two sides do not need to match - vary the RC time constant for one side to get a lower or a higher duty cycle). With the values shown, the flash rate is about 1 cycle per second at 50% duty cycle.
The 470 ohm resistors determine the LED brightness. Lower resistance means higher current, and more light. LEDs that require more current or have a higher operating voltage (such as green and yellow) may work better with 300 ohms. The RC time constant of the 39K ohms resistor and the 10uF capacitor determines the on time for each side. (The two sides do not need to match - vary the RC time constant for one side to get a lower or a higher duty cycle). With the values shown, the flash rate is about 1 cycle per second at 50% duty cycle.
Sunday, September 7, 2014
2 X 200W STEREO CLASS T DIGITAL AUDIO AMPLIFIER TDA2075A
GENERAL DESCRIPTION
The TDA2075A is a two-channel, amplifier driver, that uses Tripath’s proprietary Digital Power Processing (DPPTM) technology. The TDA2075A offers higher integration over previous Tripath amplifiers driver chipsets while providing exceptional audio performance for real world applications. Class-T amplifiers offer both the audio fidelity of Class-AB and the power efficiency of Class-D amplifiers. The TDA2075A is typically configured as a split-supply, single-ended, stereo amplifier. The TDA2075A can also be configured single-supply, single-ended, stereo amplifier, via external component choice. For applications that require bridged output drive, please refer to the TDA1400.
Applications
- Powered DVD Players
- Mini-Compo Systems
- Audio/Video Amplifiers & Receivers
- Multimedia Speakers
Benefits
- Reduced system cost with smaller/less expensive power supply and heat sink
- Signal fidelity equal to high quality Class-AB amplifiers
- High dynamic range compatible with digital media such as CD and DVD
Features
- Class-T architecture with proprietary DPP
- “Audiophile” Sound Quality
- Full Audio Bandwidth, 20Hz to 20kHz
- High Efficiency
- Supports wide range of output power levels and output loads by changing supply voltage and external Mosfets.
- Compatible with unregulated power supplies
- Output over-current protection
- Over- and under-voltage protection
- Over-temperature protection
- 48-Pin LQFP Package
Circuit Diagram:
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| 2x200W Power Amplifier circuit TDA2075A |
Monday, August 25, 2014
The Air iPad 2 and the new iPad Mini Reader
According to the latest rumors, Apple is integrating fingerprint reader, Touch ID, in its different versions of iPad this year. This is not a big rumor as it is quite logical that the company is planning to expand the devices with this feature, allowing users more security on their devices.
Now, a photo revealed as the iPad could see Air 2 (second generation iPad Air) and the new iPad Mini with Retina Display, with the Touch sensor ID.
Additionally able to know a little Air iPad 2 and the new iPad Mini, the picture also show an iPhone over them two, possibly iPhone 6, but few extra details that can be perceived in this cell phone, as in Apples new tablet.
According to rumors, the iPad Air 2 would have some design changes, but it is not known whether these changes would also be coming to the third generation of the iPad Mini.
However, no more details are known about, so take into consideration the picture but did not have your own doubts, as it is actually impossible to know if these would be the new Apple devices.
Wednesday, August 20, 2014
24 W BTL or 2 x 12 W stereo car radio power amplifier
GENERAL DESCRIPTION
The TDA1510AQ is a class-B integrated output amplifier encapsulated in a 13-lead single in-line (SlL) plastic power package. Developed primarily for car radio application, the device can also be used to drive low impedance loads (down to 1,6 Ω). With a supply voltage (VP) of 14,4 V, an output power of 24 W can be delivered into a 4 Ω Bridge Tied Load (BTL), or when used as a stereo amplifier, 2 × 12 W into 2 Ω or 2 × 7 W into 4 Ω.
Features
- Flexibility − stereo as well as mono BTL
- Low offset voltage at the output (important for BTL)
- Load dump protection
- A.C. short-circuit-safe to ground
- Low number, small sized external components
- Internal limiting of bandwidth for high frequencies
- High output power
- Large useable gain variation
- Good ripple rejection
- Thermal protection
- Low stand-by current possibility
- High reliability.
Circuit diagram:
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| BTL circuit car radio power amplifier |
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| Stereo Circuit car radio power amplifier |
Datasheet for TDA1510: Download
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