Schematic Diagram: regulator

Showing posts with label regulator. Show all posts

Thursday, November 13, 2014

Ceiling Fan Regulator Circuit Motor Speed Controller

This is a simple ceiling fan regulator circuit diagram tutorial. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because its control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator circuit built with few numbers of parts. The circuit mainly based on Z0607 TRIAC. This is a low power AC semiconductor device. Generally which is used to controlling speed of low power ac motor speed.

Circuit Diagram of Ceiling Fan Regulator :

Fig: Ceiling fan regulator (AC motor speed controller) Circuit Diagram

In this ceiling fan regulator circuit, R1=500KΩ is a variable resistor that is used to adjust the fan speed. Capacitor C1 2A104J is a Polyester film capacitor.

Pin Diagram of TRIAC(T1)- Z0607:

Fig: Z0607-TRIAC Pin diagram

Pin Diagram of Variable Resistor R1:

Fig: Pin Diagram of Variable Resistor

Parts List Of Ceiling Fan-Motor Speed Controller circuit:

T1 = Z0607 -TRIAC
D1 = DB3 C312 -DIAC
R1 = 500KΩ -Variable Resistor
R2 = 37KΩ -Resistor
C1 = 2A104J -Polyester film capacitor.
M1 = Single Phase AC Motor (Ceiling Fan)-220V,50Hz

Tuesday, November 4, 2014

Simple But Digital Fan Regulator

The circuit presented here can be used to control the speed of fans using induction motor. The speed control is nonlinear, i.e. in steps. The current step number is displayed on a 7-segment display. Speed can be varied over a wide range because the circuit can alter the voltage applied to the fan motor from 130V to 230V RMS in a maximum of seven steps.

The triac used in the final stage is fired at different angles to get different voltage outputs by applying short-dura-tion current pulses at its gate. For this pur-pose a UJT relax-ation oscillator is used that outputs sawtooth waveform. This waveform is coupled to the gate of the triac through an optocoupler (MOC3011) that has a triac driver output stage.

Pedestal voltage control is used for varying the firing angle of the triac. The power supply for the relaxation oscillator is derived from the rectified mains via 10-kilo-ohm, 10W series dropping/limit-ing resistor R2. The pedestal voltage is derived from the non-filtered DC through optocoupler 4N33. The conductivity of the Darlington pair transistors inside this optocoupler is varied for getting the pedestal voltage.

For this, the positive sup-ply to the LED inside the optocoupler is connected via different values of resistors using a multiplexer (CD4051).

Digital Fan Regulator Circuit Diagram:

The value of resistance selected by the multiplexer depends upon the control in-put from BCD up-/down-counter CD4510 (IC5), which, in turn, controls forward bi-asing of the transistor inside optocoupler 4N33. The same BCD outputs from IC5 are also connected to the BCD-to-7-seg-ment decoder to display the step number on a 7-segment display. NAND gates N3 and N4 are config-ured as an astable multivibrator to produce rectangular clock pulses for IC5, while NAND gates N1 and N2 generate the active-low count enable (CE) input using either of push-to-on switches S1 or S2 for count up or count down operation, respectively, of the BCD counter.

Optocoupler 4N33 electrically isolates the high-voltage section and the digital section and thus prevents the user from shock hazard when using switches S1 and S2. BCD-to-7-segment decoder CD4543 is used for driving both common-cathode and common-anode 7-segment displays. If phase input pin 6 is ‘high’ the decoder works as a common-anode decoder, and if phase input pin 6 is ‘low’ it acts as a common-cathode decoder. Optocoupler 4N33 may still conduct slightly even when the display is zero, i.e. pin 13 (X0, at ground level) is switched output pin 3. To avoid this problem, adjust preset VR1 as required using a plastic-handled screwdriver to get no output at zero reading in the display.

Thursday, October 23, 2014

Micropower Voltage Regulator

This circuit was industrial to power an AVR microcontroller from a 12 opposed to run-acid battery. The watchdog itself draws solitary 14 µA. Of avenue, at hand are dyed-in-the-wool ICs, in lieu of model from Linear machinery or else Maxim, which can subsist used, but these can be very brutally to pick up grasp of and are commonly barely to be had during SMD letters these days. These difficulties are simply and quickly avoided using this discrete circuit. The succession control device factor is the widely-presented type BS170 FET. whilst power is useful it is driven on via R1. When the output voltage reaches 5.1 opposed to, T2 starts to conduct and limits some advance gradient stylish the output voltage by pulling down the voltage on the gate of T1. The output voltage can be present calculated seeing that follows:

Micropower Voltage Regulator Circuit Schematic

OUT = (VLED + VBE) × (R4 + R2) / R4

Anywhere we can agreed ULED by 1.6 in opposition to and UBE at 0.5 V. The warmth coefficients of ULED and UBE can moreover be incorporated into the formula. The circuit is so effortless with the intention of of line someone has thinking of it ahead of. The author’s hard work control bowed up an illustration appearing in a collection of reference circuits dating from 1967: the example is very alike to this circuit, although it used germanium transistors and of choice here was refusal FET. The voltage reference was a Zener diode, and the circuit was designed used for currents of up to 10 A. Perhaps our readers pray be there able to unearth even earlier examples of two-transistor regulators using this belief?

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.

Monday, September 15, 2014

Rotative Speed Regulator Borer Driller Controller

This rotative speed regulator schema schematic allows to control the holing speed of your borer or driller machine. This project is based on the fact that if the load grows, the voltage decrease and current increase. Use this schema to control the speed of revolutions of your drilling mill or bench drill.

Driller controller schema schematic

Source By :www.diagramproject.com

Friday, August 29, 2014

Battery Switch With Low Dropout Regulator

In the form of the LT1579 Linear Technology (www.linear-tech.com) has produced a practical battery switch with an integrated low-dropout regulator. In contrast to previous devices no diodes are required. The schema is available in a 3.3 V version (LT1579CS8-3.3) and in a 5 V version (LT1579CS8-5), both in SO8 SMD packages. There is also an adjustable version and versions in an SO16 package which offer a greater range of control and drive signals. The main battery, whose terminal voltage must be at least 0.4 V higher than the desired output voltage, is connected to pin IN1. The backup battery is connected to pin IN2. The regulated output OUT can deliver a current of up to 300 mA. The LDO regulator part of the IC includes a pass transistor for the main input voltage IN1 and another for the backup battery on IN2.

Battery Switch With Low-Dropout Regulator schema Diagram

The IC will switch over to the backup battery when it detects that the pass transistor for the main voltage input is in danger of no longer being able to maintain the required output voltage. The device then smoothly switches over to the backup battery. The open-drain status output BACKUP goes low to indicate when this has occurred. When neither battery is able to maintain the output voltage at the desired level the open-drain output DROPOUT goes low. The LT1579 can operate with input voltages of up to +20 V from the batteries. The regulator output OUT is short-schema proof. The shutdown input switches off the output; if this feature is not required, the input can simply be left open.

Thursday, August 21, 2014

Workings of STR IC Regulator Power Supply

The meaning STR in this article for example is a Sanken regulator series and Fairchild series STR-F/G/W KA05Q Is an ic Quasy Resonant Flyback (QRF) Swiching Regulator comprising (a) control IC and (b) power MOSFETs that are packed into a single unit. The regulator is designed so that only requires a few external components.

How it works :

A. UVLO (under voltage lock out)

Regulators will start working when the voltage Vcc start-up on pin-4 reaches 16V. Once the power supply voltage Vcc further work will be reimbursed through a switching transformer supplied from a diode rectifier. At the time the circuit was working when the voltage Vcc is less than 15V, the regulator controls will still work. regulator will stop working (protectionism) if the supply voltage Vcc drops to less than 11V.

2. Feedback control (pin-1)

PWM regulators work using the system, wherein the output voltage B + to stable controlled by the feedback circuit of the output voltage B + >>> >>> photo-coupler pin-1. A capacitor mounted on the pin-1 is used to prevent noise disturbance if anyone does not interfere with the working system.

3. Soft start (pin-5)

When the power is turned on first, then the circuit has not been working behind the Uman because there is no output voltage B +. This causes a heavy current on the MOSFET start. To prevent this, the regulator is equipped with soft start circuit internally and an external filter kapasitr.

If the power supply is used to monitor for example, the frequency of the regulator needs to be synchronized. External synchronization signal can be input through pin-5s

4. Protectors

Regulators are equipped with all sorts protector.

Over-current protector (OCP) or Over Load protector (OLP). For example, if there is damage to flyback or def yoke, it will cause the load voltage B + over. If there is such a case the regulator will die protectionism so that IC is not damaged. For over current sensor is a resistor with a small value that is placed on pin-2 to the ground.
Short protector. If the output voltage B + short, the regulator turns off protectionism.
Over-voltage protectors (OVP). Regulators are not equipped with a surge protector so if the feedback path disconnected can cause the output voltage of the transformer switching regulator power up or damaged .. With OVP protectionist regulator will die if the voltage supply Vcc pin-4 rise above 22.5v.
Thermal protector. Regulators will stop working if the temperature reaches 140 degrees Celsius.

6. Auto start.

Regulators will start automatically if the auto turns itself (protectionism) after OVP or OCP

read also ->>>> Troubleshooting STR IC Regulator Power Supply