Showing posts with label single. Show all posts
Showing posts with label single. Show all posts
Sunday, October 26, 2014
AA cell drive 5 LED display flashing Single
This the circuit or schematic diagram inexpensive LED flashlight (LED display) at 5 LED amounts that apply runs on a single aa cell battery 1.2V size AA cell and has a cluster of 5 LED. By it use transistor x2 very the circuit is the character switching regulator boost up voltage 1.2V DC from be 3V DC for apply to LED super bright 5 Pcs. usability circuit be this amounts just press SW1 only.
Thursday, October 16, 2014
Single Chip Theremin Circuit Diagram
This schematic diagram show a single chip Theremin circuit. Theremin is an electronic music instrument which sense hand movement to control the tones/frequency. This Theremin circuit uses two separate Colpitts LC oscillators to produce a beat frequency.
The frequencies of two Colpitts LC oscillators are mixed and then rectified. This rectification demodulate the mixed signal to get the beat frequency which is in audible range. This beat frequency or difference is the real Theremin’s output. The oscillator is operated at high frequency (inaudible) to get wide audible frequency range of beat frequency when two oscillator output is mixed. This circuit uses a 4011 quad gate to construct the high frequency oscillator operating at 250kHz. Here is the schematic diagram of the circuit.
Single Chip Theremin Circuit Diagram
The metal probe that is used to sense your hand produces only small frequency shift in term of percentage of original frequency, that’s why we need to derive the beat frequency to get wide audible frequency range as the result of high frequency shifting. The IC2, an LM741 is used to amplify the mixed signal before rectification.
The D1 will rectify the mixed signal to detect the audio (the beat frequency). This audio signal is then filtered by an adjustable bandpass filter IC3. The further audio amplification before power amplifier IC5 is done by IC4. The metal toilet-tank float is used for the hand probe since is has better sensitivity than a simple wire antenna, but any conductive material will work.
Friday, August 29, 2014
Dual channel 46 W 2 Ω single channel 92 W 1 Ω amplifier
General description
The TDA1566 is a car audio power amplifier with a complementary output stage realized in BCDMOS. The TDA1566 has two Bridge Tied Load (BTL) output stages and comes in a HSOP24 or DBS27P package. The TDA1566 can be controlled with or without I2C-bus. With I2C-bus control gain settings per channel and diagnostic trigger levels can be selected. Failure conditions as well as load identification can be read with I2C-bus. The load identification detects whether the outputs of a BTL channel are connected with a DC or AC load and discriminates between a speaker load, a line driver load and an open (unconnected) load. The TDA1566 can be configured in a single BTL mode and drive a 1 Ω load. For the single BTL mode it is necessary to connect on the Printed-Circuit Board (PCB) the outputs of both BTL channels in parallel.
Features
Operates in I2C-bus mode and non-I2C-bus mode
TH version: four I2C-bus addresses controlled by two pins; J version: two I2C-bus addresses controlled by one pin.
Two 4 Ω or 2 Ω capable BTL channels or one 1 Ω capable BTL channel
Low offset
Pop free off/standby/mute/operating mode transitions
Speaker fault detection
Selectable gain (26 dB and 16 dB)
In I2C-bus mode:
DC load detection: open, short and speaker or line driver present
AC load (tweeter) detection
Programmable trigger levels for DC and AC load detection
Per channel programmable gain (26 dB and 16 dB, selectable per channel)
Selectable diagnostic levels for clip detection and thermal pre-warning
Selectable information on the DIAG pin for clip information of each channel separately and independent enabling of thermal-, offset- or load fault.
Independent short-circuit protection per channel
Loss of ground and open VP safe
All outputs short-circuit proof to VP, GND and across the load
All pins short-circuit proof to ground
Temperature controlled gain reduction at high junction temperatures
Circuit Diagram
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| circuit diagram for dual channel 46W |
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| single channel 92 W/1 Ω amplifier |
Tuesday, August 26, 2014
Simple Single ended Regulator Wiring diagram Schematic
In this conventional single-ended regulator schema diagram, the two outputs of the:SG1524 are connected in parallel for effective 0-90% duty-cycle modulation The use of an output inductor requires an RC phase compensation network for loop stability.
Single ended Regulator Circuit Diagram
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