Saturday, 31 December 2016
UHF FM Remote Control Receiver Circuit
The receiver is intended primarily for use with the remote control UHF transmitter described in the preceding article. It is a super-regenerative type with an active RF amplifier, T1. The antenna signal is applied to the input inductor via a BNC socket, K1. The input circuit is tuned by trimmer C4. The amplified RF signal is applied to the input of [...]
Friday, 30 December 2016
Electrical Isolation For I2C Bus
When the SDA (Serial DAta) lines on both the left and right lines are 1, the circuit is quiescent and optoisolators IC1 and IC2 are not actuated. When the SDA line at the left becomes 0, current flows through the LED in IC1 via R2. The SDA line at the right is then pulled low via D2 and IC1. Optoisolator IC2 does not transfer this 0 to the left, [...]
An Expandable Multi Zone Modular Burglar Alarm
The Basic Alarm Circuit has an automatic Exit/Entry Zone - an Instant Alarm Zone that will accept both normally-closed and normally-open triggering devices - and an "Always On" 24-hour Personal Attack/Tamper Zone. By using the Expansion Modules - you can add as many extra alarm zones as you require. Schematic DiagramThe Alarm is armed and disarmed [...]
Dual 15 W BTL power IC for car audio
The AN7195Z is an audio power IC developed for the sound output of car audio (dual 15 W).Dual 15 W BTL power IC for car audioDatasheet for AN7195: Downl [...]
Stereo TDA2822 audio power amplifier circuit
In this series I use IC tda2822M as the main amplifier, but if you want to use in addition to IC TDA2822M you can use ic I mentioned this is KA2209, NJM2073, U2822B, U2823B. Output is issued no more than 4W, which had low output. Supply voltage from 3 volts to 16 volts.Below its schematics of TDA2822 stereo audio power amplifierPart descriptionR1 = [...]
Thursday, 29 December 2016
Multi Switching System with automatic Time Delay Off MSTDO
Energy conservation is the prime purpose of the design MSTDO. One particular application of the MSTDO is pressing of stairway lamps in a multi-storey building. When one desires to reach a certain floor level using the stairway, see figure below (A), he will return on the stairway lamps (L1,L2,L3…Ln) by pressing any one of the stairways push button [...]
Precision Full Wave Ac Dc Converter Circuit Diagram
A dc level is produced that corresponds to the ac input rms value (if sine wave), -i set the gain of IC2 to 1.11. This factor is the average-to-rms conversion factor. IC1 and IC2 act as a full-wave rectifier circuit, with Dl and D2. Precision Full-Wave Ac/Dc Converter Circuit Diagram [...]
Replace your filters regularly Close the windows
Replace your filters regularly - Close the windowsReplace your filters regularly. Most heating and cooling equipment require clean filters, in order for them to run clean. The filters can also help them in becoming more energy efficient. With that, replacing your filters regularly can help you save a lot in terms of energy consumption. Ask [...]
Schematic Audio Amplifier with IC AN7108
See this circuit below:Datasheet IC AN7108Vcc = 1-6,6 VPout = 2X 30 mWRL = 32 OhmFt = 20-20 KhzIcco [...]
Simple but reliable car battery tester
This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source. Circuit diagram : Simple but reliable car battery tester Circuit Diagram When the test button is pressed, the Car battery voltage is feed into [...]
4 Transistor Amplifier for Small Speakers Circuit Project
The circuit above shows a 4-transistor utility amplifier suitable for a variety of projects including receivers, intercoms, microphones, telephone pick-up coils, and general audio monitoring. The amplifier has a power isolation circuit and bandwidth limiting to reduce oscillations and "motorboating". The values are not particularly critical and modest [...]
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 [...]
Electromagnetic Field Detector Circuit
Circuit diagram This lovely circuit is a real gem! Easy to assemble and more sensitive than many commercial devices available. It's based around an LF351 low-noise operational amplifier and a 1mF choke acting as the sensor. Unlike most other simple EMF detectors, this one has a meter output for accurate reading, but alternatively, you can also [...]
Wireless Mains Voltage Tester
This circuit can be used to test whether mains voltage is present or not without having electric contact with mains line. The CMOS IC CD4033 is the heart of this circuit. The CD4033 consists of a 5 stage decade Johnson counter and an output decoder for converting the Johnson code to a 7 segment decoded output for driving 7 segment LED display. A 10cm [...]
DC to AC converter 12 to 100 Voltage circuit with IC
An AC-DC voltage converter with electrically isolated with onput and output circuits and converters with a transformer with at least one primary coil and a capacitor resonance said coil to at least one primary school.A switching transistor whose collector-emitter path is connected in series at least a coil and the primary school to the transistor [...]
Tuesday, 27 December 2016
Booster amplifier circuit
The above circuit is a circuit of booster amplifiers or amplifier end of a power amplifier circuit, Circuit over in the most important influence whether or not , and many more are affected in this final series. Because the booster circuit is the amplifier end of the work was too heavy components causing the rapid component of the heat. If we [...]
New Simple Lie detector Circuit Diagram
This is the New Simple Lie detector Circuit Diagram. The two probes shown are held in the hands and the skin resistance applies bias to the transistor. New Simple Lie detector Circuit DiagramThe 5 k ohm pot is set for zero deflection on the meter. When the ' 'subject'' is embarrassed or lies, sweating on the hands takes place, increasing [...]
Structured Text Tutorial to Expand Your PLC Programming Skills
Do you also struggle reading your own and others huge ladder diagrams? The truth is, that even though ladder diagram (LD) is an easy programming language for beginners, it can be very hard to read and understand. That’s why Structured Text is a better PLC programming language, and you can learn it in this tutorial. It can be almost impossible to find [...]
Monday, 26 December 2016
2MHz Square Wave generator Circuit Diagram
With the values shown the circuit generates a 2-MHz symmetrical square wave. Changing capacitors Cl and C2 to 0.01 µ¥ results in a frequency of 500 Hz. For the particular integrated circuits and power supply voltages (5.0 V), the reliable operating range of Rl = R2 is 2 k ohm to 4 k ohm. 2MHz Square Wave generator Circuit Diag [...]
Panasonic TX 28LD2P – Circuit diagram Schematic
Used ICs: TEA6415C – MSP3410BPPF7 – TDA6103Q/N3 – TDA4601 – CCU30001-07 – LA4280-TV – TPU3041-22 – VDP3108APPA1 – LA7845N – ZTFH44011A(LOT)Circuit diagram (Schematic)Click on the schematics to zoom [...]
LM1875 20 Watt Audio Power Amplifier
20 Watts Power Amplifier circuit can be made with an IC power amplifier LM1875. IC LM1875 is a single chip power amplifier from National. 20 watts audio amplifier with LM1875 is a low power amplifier with good quality to the room. To assemble the amplifier 20 watts with IC LM1875 component is not needed much support. 20 watts power amplifier using [...]
Genius Wireless Mouse without Battteries
Genius Mouse DX-BlueEye ECO is the world’s first wireless mouse without batteries for PC & Mac users. No battery? Yes, the secret is the use the of the built-in capacitor (gold capacitor) that replace the battery and can be used up to 100,000 times refill.According to Genius, all we need simply refill it for 3 minutes then the mouse can be used [...]
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 ElectretCondenser [...]
Sunday, 25 December 2016
1000Watt Audio Power Amplifier Blazer Circuit
1000Watt Audio Power Amplifier Blazer CircuitThis is a audio power amplifier Blazer circuit provides up to 1000Watt . This fascinating routes several sensible bass and treble alive. Importantly ought to opt for Power offer supply, that has been fairly high voltage category 70Vdc GND -70V 10A is that the current low level.The transistors are 2SC3858 [...]
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