Speed Fan Control Circuit using IC CD4017B

Speed Fan Control Circuit using IC CD4017B Circuit

The simple abstraction activity is use IC CD4017 to ascendancy 4 relays which affix anniversary pole. IC CD4017B which is counter-cum-1kHz decoder and the arresting is disconnected into ten according intervals, Which can be programmed, via the distinct location, 10-mode.

According to the backward advertisement of the continuance of the acting period, the agnate achievement of the CD4017 inhibits adverse CD4017 (per pole of circling and diode D6), and fires the triac.

Here transistor T2 acts as a disciplinarian transistor. Pin by 4017, with aught at the achievement of the sensor for the about-face to 0(zero ascertain output) anniversary canyon through zero.

Remark. The accepted beachcomber forms of assertive positions of the rotary switch, as declared in EFY Lab are in the account 1.

The ambit is able to administer for a ambassador in the activity lighting equipment, hot air, oven singal Universal AC motor, heating, etc.

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SP LED Flashlight Using Supercapacitor

Bored of joking with capacitors? Then its time for you to maneuver on to super-capacitors. These have huge storage capabilities. during this article you may conclude the way to build atiny low LED flashlight using supercapacitors.

The most disadvantage of capacitors is their giant voltage drop. For this project, a minimum voltage of two volts is needed to light-weight the LED. As a result, the “Joule Thief” style would be incorporated here. Using this, a AA battery is used to light-weight an LED until its fully discharged.
 during this case, a supercapacitor would be taking the place of the battery. Here an LED is employed to perform the operate of a diode. This ensures that theres sufficient voltage across the LED.

 the necessities of the project are listed below:
White LED
Super capacitor (10F, 2.7 V)
Transistor
Torus
1 k ohm resistor
Wires
Breadboard
The torus and therefore the transistor used here comes from an energy-saving lamp HS. Care ought to be taken whereas removing this from the lamp as a breakage may lead to the discharge of the mercury vapors. A lamp load along side a USB port is added to the circuit. This makes it compatible with a computer or a automotive radio.

A couple of precautions got to be taken whereas constructing the circuit. The USB port mustnt be supplied with excess power. The capacitor doesnt stand up to a high voltage and hence a zener diode is connected in parallel to handle the high voltage. The diode protects the capacitor when the voltage exceeds an explicit price.

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Six way Switch Using IC1 40106N

hire is simple circuit of six-way switch using IC1 40106N. The 40106 is a versatile CMOS IC containing six Schmitt trigger inverters. It can be used to implement a set of alternating –action switches with hard ware contact bounce suppression.

Six-way Switch Circuit Diagram :



Aside from one gate of the IC, all you need for each switch is a pushbutton, a resistor and two capacitors. It works as follows. The 1 μF capacitor at the output is charged or dis-charged via a 1 MΩ resistor, depending on the output level of the inverter.

Pressing the button causes the input level of the gate to change, which in turn causes the output level to toggle. The 10 nF capacitor determines the output state after the supply voltage is switched on. You can connect it to the supply voltage rail or the ground rail as required. If you hold the button pressed, the output signal will be a square wave with a frequency determined by the RC time constant, which is approximately 1 second.

You may experiment with the component values if you wish.

Author : Kees van het Hoff - Copyright : Elektor

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Voltage Inverter Using Switch Mode Regulator

This circuit uses a step-up switch-mode regulator, which is usually used to produce a positive supply, to generate a regulated negative output voltage. The device used here is the MIC4680 from Micrel (www.micrel.com), but the idea would of course work with similar regulators from other manufacturers. 

Because of coil L1, which performs the voltage conversion by the intermediate storage of energy in the form of a magnetic field, the output is effectively isolated from the input. We can therefore connect the right-hand side of L1 to ground rather than to the positive output without causing a large current to flow. Then we connect the ground pin of the regulator IC and all the components connected to it as the negative voltage output, isolated from ground.

The components on the output side of the regulator are connected as usual: flywheel diode D1, coil L1 and the voltage divider formed by R1 and R2. These last two components set the output voltage, according to a formula given in the data sheet. Example component values for the MIC4680 used here are given in the table. The input voltage should lie within the permitted range for the regulator used, and must in any case be at least as great in magnitude as the desired output voltage (here +5 V or +12 V), so that the step-down regulation technique can wor.

It is important to take care when building this circuit to mount the regulator using an insulator, since generally the GND pin of the device is connected to the heatsink tab. Also, the ON/OFF control input cannot be driven using a normal logic signal, since the regulator’s ground reference is the output voltage rather than ground itself. If the ON/OFF function is required, a level shifter or optocoupler must be used.

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Car Parking Sensor circuit Using Infra Red LED

This circuit can be used for an assist in parking the car near the garage wall backing up Pls. LED D7 illuminates Pls bumper-wall distance is about 20 cm., D7 + D6 illuminate at about 10 cm. and D7 + D6 + D5 at about 6 cm. In this manner you are alerted Pls approaching too close to the wall.

Car Parking Sensor circuit

All distances mentioned before can vary, depending on infra-red transmitting and receiving LEDs used and are mostly affected by the color of the reflecting surface. Black surfaces lower greatly the device sensitivity. Obviously, you can use this circuit in other applications like liquids level detection, proximity devices etc.

Note:

• The infra-red Photo Diode D2, should be of the type incorporating an optical sunlight filter: these components appear in black plastic cases. Some of them resemble TO92 transistors: in this case, please note that the sensitive surface is the curved, not the flat one.
• Avoid sun or artificial light hitting directly D1 & D2.
• If your car has black bumpers, you can line-up the infra-red diodes with the (mostly white) license or number plate.
• It is wiser to place all the circuitry near the infra-red LEDs in a small box. The 3 signaling LEDs can be placed far from the main box at an height making them well visible by the car driver.
• The best setup is obtained bringing D2 nearer to D1 (without a reflecting object) until D5 illuminates; then moving it a bit until D5 is clearly off. Usually D1-D2 optimum distance lies in the range 1.5-3 cm.

List Component of Car Parking Sensor circuit:

R1 : 10K
R2,R5,R6,R9 : 1K
R3 : 33R
R4,R11 : 1M
R7 : 4K7
R8 : 1K5
R10,R12-R14 : 1K
C1,C4 : 1µF/63V
C2 : 47pF
C3,C5 : 100µF
D1 : Infra-red LED
D2 : Infra-red Photo Diode (see Notes)
D3,D4 : 1N4148
D5-7 : LEDs (Any color and size)
IC1 : NE555
IC2 : LM324
IC3 : LM7812 

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L200 IC Circuit 3 to 30V Power Supply

 The following picture shown a 3 to 30V power supply circuit diagram using L200 IC made by Anwar von Sroka.It is constructed for the use with 100W transceivers.

The L200 IC which is known as virtually blow-out proof IC for voltage and current programmable regulation, is able for regulating the voltage as well as the current. It should be connected as close as possible to the minus terminal. Here, if you need to see the L200 datasheet.

Download this application datasheet about 3 to 30V Power Supply using L200 IC Circuit by Anwar von Sroka, here: http://www.mydarc.de/dl5dbm/20a_e.pdf

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Stereo amplifier 3W 3W using ic BA5406

IC number is BA5406 IC stereo audio amplifier size 3 watt + 3 watt.The circuit is small and easy to create.Suitable for expanding the use of music in a private room.Or may be used in any trial.
When raising the power supply 12 volts to this circuit.Input the left and the right to access the input pin, to pin 5 and pin 8 of IC.The signal through the C1 and C2 are coupling signal.To prevent DC, to interfere in the circuit.Then the amplifier IC is not a return phase.Exit output, Pin 2 and Pin 11.And the output signal out of each channel, left and right through C9 and C10.Add to block DC and low frequency stability.Then went out to the speakers.The C7 and C8 are connected to pins 3 and pin 10 of IC, respectively.The pin 3 and pin 10 is pin Boot Strap will help to gain a better.The C5 and C6 are connected to pins 6 and Pin 7.A pin Filter, the C5 and C6 serve cut noise from the IC.

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