Number of controls are required to be provided on a panel of CRO to facilitate its proper functioning. Intensity control is provided for adjustment of brightness of the spot on the screen. It is accomplished by varying the voltage between the first and....

This circuit generates speed pulses from the speed-dependent voltage spikes generated by commonly used types of PC power supply fans, which are superimpos....

The NJM2574 is a Low Voltage Video Amplifier contained LPF circuit75 driver and internal CLAMP/BIAS SWLPF/through SW to connect TV monitor directly. The input composite signal. (0. 5Vpp) The mute circuit with power save function is suitable for low power....

Long distance HVDC lines carrying hydroelectricity from Canada`s Nelson river to this converter station where it is converted to AC for use in southern Manitoba `s grid A high-voltage, direct current (HVDC) electric power transmission system uses direct....

Under the loading condition of the resistance, output voltage Uo variable range: 30V~36V; Maximum output current LOmax: 2A; When U2 becomes from 15V to 21V, the regulation factor SU of the voltage is less than or equal to 0. 2% Io =2A ; When Io becomes from....

An H bridge is a kind of circuit you use to control the direction (and sometimes speed) of an electric motor, using only a single polarity voltage (you need to reverse the way current flows in order to reverse the way the motor rolls). You have 4....

This circuit uses the versatile MAX038 function generator. Although in this circuit some of the advanced characteristics of this IC are disabled, you can generate Sine, Triangle, Square waves (adjusting A0 and A1 pins see datasheet on if you want other....

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This is a regulated and adjustable power supply which can deliver up to 20A and adjustable voltage between 4 and 30V. It is easy to build and uses LM338 an....

This circuits allows you to use a cheap loudspeaker as a microphone. Sound waves reaching the speaker cone cause fluctuations in the voice coil. The voice coil moving in the speakers magnetic field will produce a small electrical signal. The circuit is....

This circuit controls resistive and inductive loads up to 2, 500W. Its main functional device is an integrated phase control circuit - Siemens TLE3103. It contains its own power supply, a zero voltage crossing detector circuit and a logic driver. An....

In this circuit SP6126 is configured as a Zeta converter to provide 0. 3A for driving four series-connected LEDs The SP6126 is a flexible and economical controller that provides the necessary functions required by a Zeta Regulator This report includes the....

The circuit given here is of a very useful and accurate digital voltmeter with LED display using the ICL7107 from Intersil. The ICL7107 is a high performance, low power, 3. 5 digit analog to digital converter. The IC includes internal circuitry for seven....

This circuit shows how to use an ordinary LED as a light sensor. It makes use of the photovoltaic voltage developed across the LED when it is exposed to light. LEDs are cheaper than photodiodes and come with a built-in filter, which is useful when the....

The common 555 timer IC forms the heart of the circuit. Its function is to charge the unknown capacitor (Cx) to a fixed voltage. The capacitor is then discharged into the meter circuit. The meter measures the current being drawn through the 47 ohm resistor.....

Q is the transistor, L1, L2, C resonant circuit formed, L2 double as feedback network, through the coupling capacitor Cb will be sent to feedback voltage transistor base. Figure 2 shows the communication channel, resonant circuit with three endpoints and the....

I have built several boards using the bq51013 EVM receiver circuit and a TPS61085 boost converter circuit(designed in SwitcherPRO Design Software) to increase the voltage level to 5. 7Volts. The problem that is that when a load of 580mA(required by end....

The JarLight is a small flashlight based on a white light emitting diode (LED). It is powered by a single battery cell. This combination enables a very compact case at a very high light power and long-life. Not only of the battery but also of the LED. To....

This electronic circuit is a simple version of an electronic roulette game and is based on the 4017 IC which is a 10 stage decade counter/divider. It is driven by another versatile IC 555 configured as a voltage controlled oscillator (VCO). The 555 timer is....

A simple 9 Volt 2 amp supply using a single IC regulator. There is little to be said about this circuit. All the work is done by the regulator. The 7809 c....

Voltmeter, Ammeter, Watt meter and Energy meter are four pillars of electrical energy and are most important devices used in electrical engineering field. You can`t imagine any application in electrical engineering without voltage, current, energy and power....

The circuit consists of N-MOSFET voltage follower T1 (common Drain) and current source T2 (NPN Darlington). Current source is set to 2. 2 Amps. With 40V of supply voltage the circuit is able to deliver about 17W into 8 Ohm loudspeaker. But takes 88W from....

Many battery powered devices use two AA alkaline cells. Often you will not know when it is time to replace the batteries until the device powered by them actually stops operating. The hobby circuit below can be connected to a 3v battery, to give you some....

This is a circuit for oscillator using astable mode operation. The basic oscillatior is using 555 timer IC. This circuit is also give mode free running oscillator. This is the figure of the circuit. Operation of the circuit is begin, when initialy by....

LM1801 Water Level Sensor Circuit Diagram. Features: reference voltage is overshot and the IC drives the ceramic transducer to beep, low power ....

A high-voltage current-limiting transformer (T1) supplies power to the basic LC tuned circuit. As C1 charges to near the transformer`s maximum output voltage, the spark gap`s air space breaks down, completing the circuit between the inductor and capacitor,....

The schematic diagram for the circuit is given in the picture above. Like its name suggests, a comparator compares two given voltages. The pair of 1K....

Did it ever occur to you that an array of white LEDs can be used as a small lamp for the living room If not, read on. LED lamps are available ready-made, look exactly the same as standard halogen lamps and can be fitted in a standard 230-V light fitting. We....

The circuit for the rs232 serial interface is of mild complexity. The main parts of the circuit are the 18F4520, MAX233A and DB-9 Connector and these portions of the circuit will be described briefly below. This is a basic +5v power regulator circuit for the....

All of the above would be internal hardware issuesa. Still, there is a possible fix; though not quick-n-easy and neither is there a workaround. The unit would have to be opened up for visual inspection, voltage measurements, confirm fault and effect repairs.....

This circuit is a very simple manual analogue light controlling desk which outputs standard 0-10V control signals suitable for controlling professional light dimmers and other lighting equipments. The output of the controller shall be a steady DC voltage....

The circuit works by varying the firing angle of the Triac. Resistors R1, R2 and capacitor C2 are associated with this. The firing angle can be varied by varying the value of any of these components. Here R1 is selected as the variable element. By varying....