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1 Products availableDiodes
1 Products availableWe offer a complete product range of DC Power Supply Kits, Water Level Indicator DIY Assembled Tested Kits, Dancing LED Tested Kits, Transformer DIY Assembled and Tested Kits Power Supply and AUDIO PLAYBACK BOARD
In most of our microcontroller based products we need 5v regulated power supply. Voltage fluctuations may result in undesirable effect on an electronic system, so to maintaining a steady constant voltage is necessary according to the voltage requirement of a system. Here we provide simple voltage regulator circuit using 7805 IC.
7805 is a voltage regulator integrated circuit. It is a member of 78xx series of fixed linear voltage regulator ICs. Which restricts the voltage output to 5V. It comes with provision to add heatsink.The maximum value for input to the voltage regulator is 35V. It can provide a constant steady voltage flow of 5V for higher voltage input till the threshold limit of 35V. If the voltage is near to 7.5V then it does not produce any heat and hence no need for heatsink. If the voltage input is more, then excess electricity is liberated as heat from 7805. Pin 1 is input voltage that has to be applied, pin 2 is ground and pin 3 is output regulated voltage. Diode 1N4007 prevents negative voltages to the 7805 IC. C1& C2 provides filtered output. When regulated voltage coming to the output terminal LED will glow. This circuit can connect any of power supply sections if regulated 5v is needed.
A water level indicator is used to indicate the level of water in an over head tank. This keeps the user informed about the water level at all times and avoids the situation of water running overflow. Four LEDs to indicate the 4 different water level positions through BC547.
S1, S2, S3 and S4 are the four probes for different positions of water tank. When any of the probes touches the water circuit will be closed and voltage coming to the base of the transistor(the base current Ib get increased by current passing through the water), LED goes ON. So easily we can understand water in the tank is in corresponding water position. 100k Resistor is used to pull-down the base of the transistor(Not to produce false result). If direct Vcc voltage coming into the base of the transistor, It may affect the transistor(So 1k is provided series to the base to limit the base current to micro amperes ).
Astable Multivibrator circuit is a simple multivibrator which has no stable state. It has two LED, which will flashing with a time period. NE555 oscillator is used for generating the free running waveforms whose output will be adjustable by varying the external RC network.
NE555 is a Timer IC, which is connected in an astable multivibrator mode. In NE555, 8thpin & 1stpin is connected to Vcc & Ground. The 4thpin is Reset pin which is active low and is connected to Vcc to avoid accidental resets. 5th pin is the Control Voltage pin which is not used, so to avoid high frequency noises it is connected to a capacitor C2 whose other end is connected to ground. Usually C2 = 0.01F. The Trigger (pin 2) and Threshold (pin 6) inputs are connected to the capacitor C1 which determines the output of the timer. 2nd& 6thPin are connected together allowing the circuit to re-trigger itself. During each cycle, capacitor C1 charges up through both timing resistors, R1 and R2 but discharges itself only through resistor, R2 as the other side of R2 is connected to thedischargeterminal, pin 7. Finally circuit works as a free running multivibrator. It has astable outputs (Pin 3). Diode 1N4007 is used for preventing the negative voltages while discharging the Capacitor C1. In Output, If LED1 is ON then LED2 is OFF and vice versa.
t1=0.693(R1+R2)C1 (Capacitor charging time)
t2=0.693R2C1(Capacitor discharging time)
T=t1+t2(Total time period)
A good regulated AC to DC power supply circuit is essential for any electronic products. Microcontrollers require a 5V DC supply, so the AC 230V needs to be converted into 5V DC using the step-down converter in their power supply circuit.
Circuit consists of 4 parts: Step down transformer, bridge rectifier, capacitor filter and voltage regulator IC. The transformer step downs the high voltage AC to a low voltage AC. W10 (Bridge rectifier) internally consists of four diodes which are connected in the form a bridge. We know that the diode is an uncontrolled rectifier which will conduct only forward bias and will not conduct during the reverse bias. Output of the W10 will get 15v DC. 15V DC can be regulated into 5V DC using 7805 IC, but before this, it is required to obtain pure DC power. The output of the W10 bridge rectifier is a DC consisting of ripples also called as pulsating DC. This pulsating DC can be filtered using a capacitor filter for removing the ripples. The Capacitor input increases from zero to a peak value and, while the supply voltage decreases from peak value to zero, capacitor starts discharging. This charging and discharging of the capacitor will make the pulsating DC into pure DC.
7805 is a voltage regulator integrated circuit. It is a member of 78xx series of fixed linear voltage regulator ICs. Which restricts the voltage output to 5V. It comes with provision to add heatsink.The maximum value for input to the voltage regulator is 35V. It can provide a constant steady voltage flow of 5V for higher voltage input till the threshold limit of 35V. Again Filter circuit is added to eliminate remaining ripples. When Output 5v is came, LED will glow. This circuit can connect any of power supply sections if regulated 5v is needed.
MG996R / MG996 Metal Gear High Torque Servo
High value, general purpose, standard size servo with high torque. Easily used with the Arduino Servo library.
Features :
Operating Voltage : 4.8-6.0V
PWM Input Range: Pulse Cycle 202ms, Positive Pulse 12ms
STD Direction : Counter Clockwise / Pulse Traveling 1500 to 1900sec
Stall Torque : 3 Kgf.cm(41.3 oz/in) at 4.8V, 3.2 Kgf.cm(44 oz/in) at 6V
Operating Speed : 0.2 sec/ 60 at 4.8V, 0.18 sec/ 60 at 6V at no load
Weight : 38g (1.27 oz)
Size : 41.3*20.3*38.7*48.5*10
Plug Available : FUT, JR
Special Feature : Heavy Duty Plastic Gears, Economy Servo
This high performance Li-Ion Battery pack is specifically manufactured to be used Robotics Projects.
The battery has XT terminal connectors for easy removing battery.
The battery has a balance charger port for Safe and efficient charging
Specifications
Advantages over traditional batteries
APR 33A3 is a low-cost high performance single chip Voice recorder and Playback device for 20 to 30 seconds voice recording and playback. This IC has data storage capacity without the use of any microcontrollers. The IC requires minimum components to create a voice recorder. The IC has non volatile flash memory technology with 100K record cycles. So data will not be lost when power off.
Step1-Select the recording mod via connecting jumper.
Step2-Plug in the Mic.
Step3-Power ON(Only 5V).
Step4 Data pins to ground that we want to record Record(Start recording), the voice via Mic or line in.
Mod2 (Playback):-Select the Playback mode via connecting jumper.
Plug in speaker.
Put low voltage into the Data pins (Active Low).
Able to hear(Speaker Out).
The Current Transformer ( C.T. ) is a type of instrument transformer, that is designed to produce an alternating current in its secondary winding which is proportional to the current being measured in its primary. Current transformers are used extensively for measuring current and monitoring the operation of thepower grid.
The L293D is a monolithic integrated high voltage, high current four channel driver designed to accept standard DTL or TTL logic levels and drive inductive loads (such as relays solenoides, DC and stepping motors) and switching power transistors.
Features:
Light weight, small dimension
Super driver capacity
Two enable inputs are provided to enable or disable the device independently of the input signals
2 DC motor/ 4 coil dual phrase stepper motor output
4 standard mounting holes
Specifications:
Driver: L293D
Driver power supply: +7V +36V
Driver peak current: 1.2A
Logic power output Vss: +5 +7V (internal supply +5V)
Max drive power: 5W
Working temperature: -40oC +150oC
Dimension: 50mm x 40mm x 20mm (l x b x h)
Pin configurations:
Double H driver module can drive two DC motors at the same time.
The board has a total of 7 pins.
A Light Dependent Resistor (LDR) or a photoresistor is a device whose resistivity is a function of the incident electromagnetic radiation. Hence, they are light sensitive devices. Photo conductivity is an optical phenomenon in which the materials conductivity is increased when light is absorbed by the material.
LDRs are light dependent devices whose resistance is decreased when light falls on them and that is increased in the dark. When a light dependent resistor is kept in dark, its resistance is very high. This resistance is called as dark resistance. We can adjust the dark resistance by pot. We can take the output from this board digital as well as analog value. LDRs have low cost and simple structure. They are often used as light sensors. They are used when there is a need to detect absences or presences of light like in a camera light meter. Used in street lamps, alarm clock, burglar alarm circuits, light intensity meters, for counting the packages moving on a conveyor belt, etc.
FeaturesCan detect ambient brightness and light intensity
Adjustable sensitivity (via blue digital potentiometer adjustment)
Operating voltage 3.3V-5V
Output Type
Analog voltage output -A0
Digital switching outputs (0 and 1) -D0
With fixed bolt hole for easy installation
Small board PCB size: 3cm * 1.6cm
Power indicator (red) and the digital switch output indicator (green)
Using LM393 comparator chip, stable
100% brand new and high qualityWith cold port compensationConvert K, J, N, T or E-type thermocouple signal into digital dataOutput 14Bit dataResolution: 0.25CHighest Temperature: +1800CLowest Temperature: -270CFor K-type thermocouple, temperature range -200C+700C, +/-2C precision
Note:-1.Works with any K type thermocouple2 K thermocouples have about 2C to 6C accuracy4.Internal temperature reading5.3 to 5v power supply and logic level compliant!6.SPI data output requires any 3 digital I/O pins.
Product Name: IMAX RC B3 Pro Compact Balance Charger for 2S 3S 7.4V 11.1V Lithium LiPo Battery.
Description:
100% Brand new and high quality
Quantity: 1pcs
Made of plastic material
Number of batteries: 2-3cells
Input voltage: 110-240V AC
Maximum charge current: 1.5A (2S) 1A (3S)
Charging Display: Through three LED lights, red and green
LED indicator shows: Wait: Green, Charging: Red, Full: Green, Fault: Red flashing
Requiring no tools for assembly, spacers/supports snap-in to produce a strong dependable grip. Easily installed and reusable for repairs, spacers/supports lock-fit to the chassis and either lock-fit or tension-fit to the PCB.
It can check 1S-8S lipoly battery, Li-ion, LiMn and Li-Fe batteries, automatically displays the voltage of each cell and the total voltage, reversed polarity protection. It can check out the battery working state at any time to protect the battery from over discharging or over charging.When the voltage is below the standard setting voltage, the alarm will buzz and the red LED light is on. Default is 3.3V, you can change the default voltage.
It can be used for rework, sphere or pin attachment to BGA, PGA and CSP packages, and assemble operations such as Flip Chip attachment to PWB substrates. It is a necessary and helpful tool in BGA reballing.
This breakout board for TIs DRV8825 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2V to 45V and can deliver up to approximately 1.5A per phase without a heat sink or forced air flow (rated for up to 2.2A per coil with sufficient additional cooling).
| Controller | DRV8825 |
| Operating Voltage (logic) | 3-5.25V |
| Operating Voltage(vmot) | 12-24V |
| Max current | 2.5A |
This Module is a carrier board or breakout board for Allegro A4988 Microstepping Driver with Translator and Overcurrent Protection. It operates from 8V to 35V and can deliver up to approximately 1A per phase without a heat sink or forced air flow (it is rated for 2A per coil with sufficient additional cooling).
| Operating voltage : | 8-35v |
| Logic voltage : | 3-5.5v |
| Microstep resolutions : | full, 1/2, 1/4, 1/8, and 1/16 |
| Current Rating : | Upto 2A |
Ramps is short for reprap Arduino mega pololu shield, it is mainly designed for the purpose of using pololu stepper driven board. Ramps can only work when connected to its mother board Mega 2560 and 4988/DRV8825. Owning to its stability in operation and great compatibility with most 3D printer.
Features:
Diameter: 18.4 +0.1 / -0.3 mm (Max. 18.5mm)Height:65.00.2mm (Max. 65.2mm)
Features:-
Astable Multivibrator circuit is a simple multivibrator which has no stable state. It has two LED, which will flashing with a time period. NE555 oscillator is used for generating the free running waveforms whose output will be adjustable by varying the external RC network.
NE555 is a Timer IC, which is connected in an astable multivibrator mode. In NE555, 8thpin & 1stpin is connected to Vcc & Ground. The 4thpin is Reset pin which is active low and is connected to Vcc to avoid accidental resets. 5th pin is the Control Voltage pin which is not used, so to avoid high frequency noises it is connected to a capacitor C2 whose other end is connected to ground. Usually C2 = 0.01F. The Trigger (pin 2) and Threshold (pin 6) inputs are connected to the capacitor C1 which determines the output of the timer. 2nd& 6thPin are connected together allowing the circuit to re-trigger itself. During each cycle, capacitor C1 charges up through both timing resistors, R1 and R2 but discharges itself only through resistor, R2 as the other side of R2 is connected to thedischargeterminal, pin 7. Finally circuit works as a free running multivibrator. It has astable outputs (Pin 3). Diode 1N4007 is used for preventing the negative voltages while discharging the Capacitor C1. In Output, If LED1 is ON then LED2 is OFF and vice versa.
t1=0.693(R1+R2)C1 (Capacitor charging time)
t2=0.693R2C1(Capacitor discharging time)
T=t1+t2(Total time period)
An Dancing LED using Astable Multivibrator is a simple hobby circuit which has no stable states. Its output oscillates continuously between its two unstable states without the aid of external triggering. The time period of each states are determined by Resistor Capacitor ( RC ) time constant.
When the circuit is switched on one transistor will driven to saturation (ON) and other will driven to cutoff (OFF). When a transistor is ON, its collector and emitter act as a short circuit. But when it is OFF they acts as open circuit. So in the above circuit when a transistor is in OFF state its collector will have the voltage Vcc and when it is ON its collector will be grounded.Consider Q1 is ON and Q2 is OFF. During this time Capacitor C2 is charging to Vcc through resistor R2. Transistor Q2 is OFF due to the negative voltage from the discharging capacitor C1 which is charged during the previous cycle. After a time period the capacitor C1 discharges completely and starts charging in reverse direction through R1.When the Capacitor C1 charges to a voltage sufficient provide base emitter voltage of 0.7V to the transistor Q2, it turns ON and capacitor C2 starts discharging. The negative voltage from the capacitor C2 turns off the transistor Q1 and the capacitor C1 starts charging from Vcc through resistor R and base emitter of transistor Q2. Thus the transistor Q2 remains in ON state. As in the previous state, when the capacitor C2 discharges completely it starts charging towards opposite direction through R2. When the voltage across the capacitor C2 is sufficient to turn ON transistor Q1, Q1 will turn ON and capacitor C1 starts discharging.This process continuous and produces rectangular waves at the collector of each transistors.
As a result Output LEDs flashing with charging & discharging time period.
T1=0.693R1C1
T2=0.693R2C2
This clone Arduino Mega2560 Pro board is a small version of the Mega2560 board.
