Showing posts with label Pre. Show all posts
Showing posts with label Pre. Show all posts
Thursday, 2 February 2017
iPhones with Flappy Bird Pre Installed Going for Sale
Selling on eBay for as much as $100,000 USD (367,000 AED).
The game Flappy Birds skyrocketed into the charts of app stores both on iOS and Android, and somehow created a fuzz for users everywhere. The game required you to simply tap on the screen to make the bird fly through obstacles but it is somehow met with frustration since most users can barely even get a score of one. The gameplay made it a trending topic on Twitter for days, along with everyone sharing their own scores and achievements.
Even with the game pulling in about $50,000 on ad revenues per day, its maker, Dong Nguyen has had enough of it. Mentioning that "he can't take [the game's popularity] it anymore," he pulled out the game from the Apple App Store and on Google Play, so if you haven't downloaded it, you're out of luck.
Now, one user on eBay has decided to sell a used iPhone 5S with the game pre-installed. The catch? He is selling it for $99,900 USD (367,000 AED). At the time of writing, the phone now has 74 bids and a quick look at the seller's profile shows he has gotten positive feedbacks previously.
eBay tells us though that it may not ship in the United Arab Emirates, in case you are interested.
Wednesday, 28 December 2016
Pre regulated High Voltage Power Supply
This Pre-regulated High Voltage Power Supply Circuit Diagram triacs selects the tap on main transformer Tl, which provides the proper, pre-regulated voltage to the secondary regulator. T2 and its associated components comprise the secondary regulator. The ADC 0804, IC1, digitizes a voltage-feedback signal from the secondary regulator`s output.
Pre-regulated High Voltage Power Supply Circuit Diagram:
The MC1415 De-multiplexer, IC2, decodes the digitizer`s output. IC2, in turn, drives Tl`s opto-isolated triacs via the 74LS240 driver chip, IC3, and associated opto-isolators. Transformer T3 samples the circuit`s current output. The auxiliary, 12 V winding on Tl ensures noload starting. The combination of op amp IC5 and the inverting transistor, Ql, square this current signal.
The output of Ql is the CLK signal, which triggers one-half of the one shot, IC4A, to begin the circuit`s AID conversion. The one shots` periods are set to time out within 1l2 cycle of the ac input. Upon completion of its AID conversion, ICl`s INTR output triggers the other half of the one shot, IC4B, which enables the converter`s data outputs. The rising edge of the CLK signal resets the one shot and latches the new conversion value into IC2. The latch, associated driver, and optoisolator trigger a selected triac according to the latest value of the voltage-feedback signal, V, . Keep enjoying don't forget click on share button .
Pre-regulated High Voltage Power Supply Circuit Diagram:
The MC1415 De-multiplexer, IC2, decodes the digitizer`s output. IC2, in turn, drives Tl`s opto-isolated triacs via the 74LS240 driver chip, IC3, and associated opto-isolators. Transformer T3 samples the circuit`s current output. The auxiliary, 12 V winding on Tl ensures noload starting. The combination of op amp IC5 and the inverting transistor, Ql, square this current signal.
The output of Ql is the CLK signal, which triggers one-half of the one shot, IC4A, to begin the circuit`s AID conversion. The one shots` periods are set to time out within 1l2 cycle of the ac input. Upon completion of its AID conversion, ICl`s INTR output triggers the other half of the one shot, IC4B, which enables the converter`s data outputs. The rising edge of the CLK signal resets the one shot and latches the new conversion value into IC2. The latch, associated driver, and optoisolator trigger a selected triac according to the latest value of the voltage-feedback signal, V, . Keep enjoying don't forget click on share button .
Monday, 26 December 2016
Condenser Pre Amplifier LM 1458
This is a simple preamplifier circuit for electret condenser microphone. using a LM1458 dual op amp IC.
The circuit takes the audio signal rom the condenser microphone and amplifier it, so you can use the microphone as the input to some device which wouldn’t normally accept microphone level signals .
Schematic Circuit of Microphone Electret
Condenser Pre Amplifier
The circuit requires a 6-9 volt supply. Output of the microphone amplifier can be made variable by connecting a 10kΩ potentiometer . Circuit’s gain can be increased by men perbesar the value of 47K, depending on the input sensitivity of the main amplifier system. The microphone should be housed in a small round enclosure.
List componet of condenser pre-amp mic circuit
Q1,Q2 : LM1458 Op-Amp
R1,R2,R3 : 4.7k ohm resistor
R4, R5 : 10k ohm resistor
R6,R7 : 47k ohm resistor
C1, : 0.22uF ceramic capacitor
C2 : 1uF ceramic capacitor
Absolute maximum ratings of LM 1458 IC
Supply Voltage : ±18V
Power Dissipation : 400 mW
Differential Input Voltage : ±30V
Input Voltage : ±15V
Output Short-Circuit Duration: Continuous
Operating Temperature Range : 0°C to +70°C
Storage Temperature Range : −65°C to +150°C
Lead Temperature :(Soldering, 10 sec.) 260°C
Saturday, 12 November 2016
Audio Pre Amplifier
Simple Audio Pre-Amplifier
This simple circuit provides good gain to too audio singnals .
Use it in main of an RF oscillators to make an RF transmitter that is very sensitive to sound
This simple circuit provides good gain to too audio singnals .
Use it in main of an RF oscillators to make an RF transmitter that is very sensitive to sound
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