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Reference: RBD-1354
Length: 8 inches/20 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Reference: RBD-0351
Contactless transmission of data and supply energy (no battery needed) Operating distance: Up to 100mm (depending on antenna geometry) RoboticsBD Operating frequency: 13.56MHz Data transfer: 106 kbit/s Data integrity: 16 Bit CRC, parity, bit coding bit counting Anticollision Typical ticketing transaction: <100 ms ( including backup management)...
Reference: 0245
Choose your desire Resistor value from below:
Reference: 0031
3 Types Available (Please select from option) 1. Male to Male 2. Male to Female 3. Female-Female
Reference: RBD-0768
Size: 5mm Color: RED Head Shape: Round Lens Appearance: Transparent
Reference: 1353
Length: 12.5 inches/30 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Reference: RBD-0761
Breadboard friendly Mounting Style: Through Hole Mounting Direction: Vertical
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Free Ship Over 5000 BDT
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No Replacement
ZK-SJ4 is a DC adjustable constant voltage, constant current step down/up power supply module. Adjustable stable output voltage and current, set output current to meet the demand. It can be used as ordinary buck power supply module, charger and LED constant current driver. Support solar charging. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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| General Specification | |
| Product Name: | ZK-SJ4 4A Step Down/Up Power Supply Module |
| Product Number: | ZK-SJ4 |
| Working Voltage: | DC 4.8V-30V |
| Output Voltage: | DC 0.5V-30V |
| Output Current: | 4A (4A need heat sink; 3A is stable for long time) |
| Output Power: | 60W (60W need heat sink;35W is for 3A) |
| Conversion efficiency: | About 94% |
| Working current: | 30mA |
| Under voltage Protection: | Yes(Self-recovery) |
| Anti-backflow Protection: | Yes |
| Short Protection: | Yes |
| Work frequency: | 180KHz |
| Working Temperature range: | -20℃~85℃ |
| Working Humidity range: | 0%-95%RH |
| Size: | 68*37*22mm |
| Heat sink size: | 48*16*10mm |
| Shipment Weight | 0.040 kg |
| Shipment Dimensions | 10 × 7 × 3 cm |
Please allow 5% measuring deviation due to manual measurement.
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1.1>.Connect right input voltage at input terminal;
1.2>.Adjust CV constant voltage potentiometer to set output voltage according to require.
1.3>.Rotate CC potentiometer counterclockwise more than 10 turns at first.
1.4>.Test Output short circuit current by multimeter at 10A or 20A(Connect two Test Probes to output terminal on module)
1.5>.Rotate CC constant current potentiometer clockwise to set output current according to require overcurrent protection value.
1.6>.Test and using(E.g:Module’s maximum output current is 2A if display 2A on multimeter.Red LED indicator will turn on if output reach to 2A.Otherwise LED is OFF.)
1.7>.The output voltage will decrease due to the current sampling resistor at the output. The higher the current, the more the voltage is reduced.
2.1>.Tops:Power module can not be used as charger module if it does not support constant current function.The voltage difference between the battery with insufficient voltage and the charger is very large.Causes excessive charging current even damage the battery.So it need keep charging in constant current mode to reaching a certain level.Then automatically switch back to constant voltage charging.
2.2>.Make sure floating charge voltage and charge current for battery.If the lithium battery’s parameter is 3.7V/2200mAh, then the float charge voltage is 4.2V, and the maximum charging current is 1C, which is 2200mA.
2.3>.Connect right input voltage at input terminal.(Note:Please don’t connect load during set parameter).
2.4>.Test output voltage by multimeter and adjust CC potentiometer to make sure output voltage reach to require floating charge voltage.(If charge a 3.7V lithium battery, adjust the output voltage to 4.2V)
2.5>.Rotate CC potentiometer counterclockwise more than 10 turns at first.
2.6>.Test Output short circuit current by multimeter at 10A or 20A(Connect two Test Probes to output terminal on module)
2.7>.Rotate CC constant current potentiometer clockwise to set output current according to require charge current value.
2.8>.Connect battery at output terminal and start to charging.
3.1>.Make sure LED working current and maximum working voltage.
3.2>.Connect right input voltage at input terminal.(Note:Please don’t connect load during set parameter).
3.3>.Test output voltage by multimeter at output terminal and adjust CV potentiometer to set output voltage to LED’s maximum working voltage.
3.4>.Rotate CC potentiometer counterclockwise more than 10 turns.
3.5>.Test Output short circuit current by multimeter at 10A or 20A(Connect two Test Probes to output terminal on module)
3.6>.Rotate CC constant current potentiometer clockwise to set output current according to require LED working current.
3.7>.Connect LED and test.
1 x Solar Charger Controller Adjustable Step-Up / Down Automatic Power Module.
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The latest price of Solar Charger Controller Adjustable Step-Up / Down Automatic Power Module in Bangladesh is BDT 659 You can buy the Solar Charger Controller Adjustable Step-Up / Down Automatic Power Module at best price from our RoboticsBD or visit RoboticsBD Office.
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Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. |
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Product Images are shown for illustrative purposes only and may differ from the actual product. |
Reference: RBD-0395
Input voltage range: 4V-38V DC Output voltage range: 1.25V-36V DC adjustable. Output current: 0-5A. Output power: 75W. High efficiency up to 96% The built-in thermal shutdown function Built-in current limit function In-Built output short protection function. RoboticsBD
Reference: RBD-0406
Input voltage: 4.5-35V, Output voltage: (3-35V) continuously adjustable (recommended load debugging). Minimum pressure: 1.5V Output current: rated current 2A, 3A maximum Output Power: 15W maximum. RoboticsBD
Reference: RBD-0623
Input voltage range: 6-26V Output voltage: 5.2V (consider the charge line loss, the output is 5.2V or so, the load side is about 5V) Output current: 3A (in the absence of a heat sink device, the stable output current is 2A) Two output Port can charge two devices simultaneously. RoboticsBD
Reference: RBD-0696
Voltage : Input through (USB) DC 5V Output via (DC Round Pin) : DC 12V Color: BLACK Input / Output Current: Maximum Input 0.6 Easier for installation save time and money Easy to use.
Reference: RBD-0916
ROHS approved Mini Solar panel The solar cells are encased and protected by a durable outer poly frame Polycrystalline silicon Max work voltage:5V Max work current: 200ma Dimension: 90mm×90mmx3mm RoboticsBD
Reference: RBD-0917
ROHS approved Mini Solar panel The solar cells are encased and protected by a durable outer poly frame Polycrystalline silicon Max work voltage:5V Max work current: 80ma Dimension: 60mm×60mmx3mm
Reference: RBD-1209
Package type: leaded Package form: top view Radiant sensitive area (in mm2): 7.5 High photo sensitivity High radiant sensitivity Suitable for visible and near infrared radiation Fast response times Angle of half sensitivity: phi = ± 65°
Reference: RBD-1524
Input Voltage(VDC): 4 ~ 40. Output Voltage(VDC): 1.3 ~ 37. Output Current: 2A Rated, ( 3A maximum with heat sink). Switching Frequency: 150 kHz. Input reverse polarity protection. Built-in output short protection function.
Reference: RBD-1545
Input voltage 9~40V Output: 5V Maximum output current 2A Efficiency: 76-90% Material: electronic component
Reference: RBD-1559
Support charging and discharging at the same time Large current Small size High efficiency Support short circuit protection
Reference: RBD-1560
Support charging and discharging at the same time Large current Small size High efficiency Support short circuit protection
Reference: RBD-1646
Input Voltage: 220VAC Output Voltage: 5 VDC. Output Power: 3.5W. Output overload and short circuit protection.
Reference: RBD-1754
It’s efficient up to 93% It can source a good amount of current The maximum output current: 2A Input voltage: 2V-24V DC The maximum output voltage: 5V-28V DC
Reference: RBD-1764
High Power DC-DC Step Down Module Input Voltage: 5-40V DC Output Voltage: 1.2-36V DC Efficiency: 95% Maximum Power: 200W
Reference: RBD-1769
Input Voltage: 4.5V – 28V Output Voltage: 0.8V – 20V Output Voltage Adjustment: On-board potentiometer Output Current: 1.8A (typical), 3.0A (max). Ceramic Capacitor Stable Internal Soft-Start Internally Set Current Limit without a Current Sensing Resistor
Reference: RBD-1771
It’s efficient up to 93% It can source a good amount of current The maximum output current: 2A Input voltage: 2V-24V DC The maximum output voltage: 5V-28V DC
Reference: RBD-1855
Input voltage: 3-40V Output voltage: 1.5-35V(Adjustable) Output current: Rated current is 2A, maximum 3A Switching Frequency: 150KHz Operating temperature:Industrial grade (-40 to +85 ) Conversion efficiency: 92%(highest)
Reference: RBD-2354
Versatile Signal Generator: Supports dual modes (PWM and PULSE) for enhanced flexibility. Wide Frequency Range: Operates from 1Hz to 150KHz with ±2% frequency accuracy. Customizable Outputs: Adjust duty cycle, pulse width, delay, and number of pulses. User-Friendly Interface: LCD display for real-time monitoring and precise adjustments. Compact &...
Reference: RBD-2156
Easy communication with any microcontroller. Tactile type switches. Over 1,000,000 operations per key. Contact rated for 12V dc @ 20mA. Over 1,000,000 operations per key.
Reference: RBD-1575
Part Number: G3MB-202P Power supply:5VDC/160mA Trigger Voltage (VDC):5 Switching Voltage (VAC):240@2A Isolation: Phototriac
Reference: RBD-1134
Easy to Assemble Comes With all Components Operating Voltage: 5VDC Operating Current: 200mA Compatible With Arduino and Raspberry Pi
Reference: RBD-1552
Working Frequency: 868 MHz Distance: 8000m RF IC: SX1276
Reference: RBD-3577
This 8-Channel Optocoupler Isolator Module is a high-performance voltage level converter that safely converts signals from industrial PLC systems (24V) to TTL levels (5V), making it ideal for microcontroller and low-voltage logic interfacing. Designed with photoelectric isolation, it ensures signal integrity while protecting your microcontroller or...
Reference: RBD-0345
802.11 b/g/n Standards Wi-Fi Direct (P2P), soft-AP 1MB Flash Memory Integrated low power 32-bit CPU could be used as an application processor A-MPDU & A-MSDU aggregation & 0.4ms guard interval Wake up and transmit packets in < 2ms Standby power consumption of < 1.0mW (DTIM3) RoboticsBD
Reference: RBD-2496
Brand: DFRobot
Operating Voltage: 3.3 – 5V Maximum Operating Current: ≤370 mA (5V) Communication: I2C/UART I2C Address: 0x64 Fixed Command: 121 Self-learning function
Reference: RBD-2092
Product Type: LED Shape: Round LED 5mm DIP type Color: pink yellow-green (high brightness) Lens type: white mist Standard Forward Voltage:3.0-4 .5 V
Reference: RBD-3267
The 100A High-Power MOSFET Module is a heavy-duty power management solution, designed to control high-current loads up to 100A while operating at voltages from 5V to 26V. Its compact and durable design ensures stable and efficient performance in industrial, automotive, and high-power electronics applications.
Reference: RBD-3312
The u-blox NEO-6M module is a low cost easy to use GPS module that includes a built-in antenna
Reference: RBD-2725
Onboard LM386 Chip. 200 multiplier benefits circuit design. On-board speaker wiring Block. On-board 10K variable resistor, you can adjust the volume of the enlarged. Onboard power indicator.
Reference: RBD-0741
Frequency Range: 433 MHZ ASK /OOK modulation mode Super anti-power interference Low-power sleep less than 1uA Low self-radiation Small size Frequency stability and reliability Various international testing standards
Reference: RBD-2340
2-channel PWM pulse frequency and duty cycle adjustable signal generator module Generates square and rectangular waveforms for experiment and development Frequency range: 1Hz to 150KHz, adjustable in three precision levels Features serial port control with customizable PWM settings via commands Compact design (44x30x11mm) with 5–30V DC operating voltage
Reference: RBD-2704
Convert voltage signals (0-5V) to industry-standard current signals (4-20mA) for control systems. Isolated design ensures safe operation and minimizes electrical noise interference. Wide operating voltage range (12-24V) for compatibility with various power supplies. Easy to use with clear LED indicators and simple connections.
Reference: RBD-1399
Operating Voltage: 12V DC Two separate LEDs for On/Off indication of the Relay Triggering input voltage 3.3V – 5V 4) Back EMF protection Equipped with high-current relay 10A@250VAC / 10A@30VDC It can control both AC and DC appliances such as Solenoids, Motors, lights, fans, etc High-quality screw terminals (Terminal Block) provided (C, NC, NO) for quick...
Reference: RBD-2566
With this High-Power MOSFET module you can easily use the double mosfet through the separate connections for power supply, switch pins and signal pins.The LED on the module indicates whether the MOSFET is switched on. This board is particularly useful for controlling a large LED strip (one color) or a motor (in one direction) by using. PWM.
Reference: RBD-0386
1 Hz output pin SQW. 32 KHz output pin 32K. RoboticsBD Voltage Supply: 2.2 V ~ 5.5 V (for RTC). Time Format: HH: MM: SS (12/24 hr). Date Format: YY-MM-DD-dd. DS 3231 based RTC with 2032 Battery Holder. RoboticsBD Battery is not included Note: Batteries not included.
Reference: RBD-2314
8-bit WS2812B 5050 RGB LED Development Board with built-in full-color driver Individually addressable LEDs for customizable lighting effects Daisy chain support for cascading multiple boards in a series Operates at 4-7V DC with a recommended 5V supply for optimal performance Compact straight PCB design for decorative and notification lighting projects
Reference: RBD-2224
Voltage – 250V Easy PCB mounting Good consistency Widely acclaimed
Reference: RBD-0663
Power supply voltage(VCC): 2.0, 3, 5.5 V. Output high VOH: 0.8VCC V Output low VOL: 0.3VCC V Response time (touch mode) : 60 mS Response time (low power mode) : 220 mS Can replace the traditional touch of a button Four M2 screws positioning holes for easy installation RoboticsBD
Reference: RBD-0410
Supply voltage: 6V-15V Chip: X9C103S Dimensions : 28 x 14 x 4 (LxWxH) mm. RoboticsBD 10K span potentiometer. Potentiometer center tap between the 0-10k slide in total 100 (potentiometer wiper typical impedance 40 ohms)
Reference: RBD-2554
Type: Operational Amplifier Test Board Material: PCB Size: Approx. 92 x 57 x 17mm / 3.62 x 2.24 x 0.67in Working Voltage: DC 12V Working Current: >100mACompatible Op-Amp Models: Single Op-Amp: LM741, LF356, NE5534, TL071, TL081, OP07, and other standard package single op-amps. Dual Operational: LM358, NE5532, TL072, TL082, MC1458, RC4558, OP275, AD827,...
Reference: RBD-1916
IC Chip: MAX3232 Operating Voltage: 3.3-5.5V It can be used to program STC MCU, NXP MCU, Renesas MCU, STM32 MCU, N+-2EC MCU Pre-assembled compact size board Suitable for use with most microcontrollers Operates up to 250 kbit/s
Reference: RBD-1722
Antenna Size : approx. 26 x 26 x 9 (LxWxH) mm. Module Size : approx. 26 x 36 x 4 (LxWxH) mm. Net weight : approx. 16 gm. Gross weight : approx. 17 gm. Mounting : approx. 3 mm. The default baud rate : 9600.
Reference: RBD-2041
Model : KY-040. Type : Incremental Encoder. Cycles per revolution (CPR) : 20. Working voltage : 0 – 5V. Material : PCB + Brass. Mounting Nut Thread diameter: 6.6mm Weight : 10 gm.
Reference: RBD-2057
Access multiple interfaces simultaneously Serial Communication Smaller Volume Wide Range of applications You can access the sample code and documents for this product by visiting your order history page.
Reference: RBD-3165
The ADS1115 ADC Module is a high-precision, 16-bit analog-to-digital converter designed for applications requiring accurate and reliable signal conversion. Compact and efficient, this module offers wide input voltage support, low current consumption, and versatile input options. With an integrated programmable comparator and onboard reference voltage, it...
Reference: RBD-2358
Compact 433 MHz wireless transceiver module with CC1101 core for stability. Supports FSK, OOK, ASK, and MSK modulation with up to 500kbps data transfer rate. Reliable transmission up to 350m in open sight with +11dBm output power. Low power consumption: Sleep current as low as 2uA, ideal for battery-powered applications. Programmable frequency allocation...
Reference: RBD-0387
All SD SPI pins output, MOSI, SCK, MISO, and CS. Support 5V/3.3V input. This module can handle 2GB SD cards. Size:4.7 x 3.1 cm. LED indicator. SD Card Holder. RoboticsBD Onboard 3.3V regulator (AMS1117-3.3) for +5v to 3.3V generation. 3.3V is also available as output.
Reference: RBD-0247
Resistance: 330 Ohm Tolerance: 5% Max. Working Voltage: 250V Temperature Coefficient of Resistance: 50PPM/°C
Reference: RBD-1855
Input voltage: 3-40V Output voltage: 1.5-35V(Adjustable) Output current: Rated current is 2A, maximum 3A Switching Frequency: 150KHz Operating temperature:Industrial grade (-40 to +85 ) Conversion efficiency: 92%(highest)
Reference: RBD-2100
Comparator chip LM393 makes module readings stable. Operating voltage 3.3V-5V. Fast Response Time Sensitivity adjustable Detects a flame or a light source of a wavelength in the range of 760nm-1100 nm. Detection range: up to 100 cm. Adjustable detection range. Detection angle about 60 degrees, it is sensitive to the flame spectrum.
Reference: RBD-0573
Rated voltage: 5V DC Reduction Ratio: 64:1 Step Angle: 5.625° /64 Frequency: 100Hz Self-positioning Torque: >34.3mN.m Friction torque: 600-1200 gf.cm Pull in torque: 300 gf.cm
Reference: RBD-1501
6 pins. JDEC compliant. Molded notch for proper orientation. Easy to insert and remove ICs.
Reference: RBD-1178
Size: 5mm Emitted Color : UV View Angle: About 20 - 25 degree. Luminous Intensity: 800mcd-2500mcdSuperbright Ultra Violet LED UV Lamp 5mm 2500mcd 365NM
Reference: RBD-0916
ROHS approved Mini Solar panel The solar cells are encased and protected by a durable outer poly frame Polycrystalline silicon Max work voltage:5V Max work current: 200ma Dimension: 90mm×90mmx3mm RoboticsBD
Reference: RBD-0094
The Arduino Uno R3 High-Quality Edition Arduino UNO in Bangladesh Micro-controller : ATmega328. Operating Voltage : 5V. Input Voltage (recommended) : 7-12V. Digital I/O Pins : 14 (of which 6 provide PWM output). Analog Input Pins : 6. The Arduino Uno R3 High-Quality Edition embodies superior craftsmanship and meticulous attention to detail, resulting in...
Reference: RBD-0768
Size: 5mm Color: RED Head Shape: Round Lens Appearance: Transparent
Reference: RBD-0022
This is the HC-SR04 ultrasonic distance sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit. There are only four pins that you need to worry about on the HC-SR04: VCC (Power),...
Reference: 0031
3 Types Available (Please select from option) 1. Male to Male 2. Male to Female 3. Female-Female
Reference: RBD-0020
Model: SG90 Weight: 9 gm Operating voltage: 3.0V~ 7.2V Servo Plug: JR Stall torque @4.8V : 1.2kg-cm Stall torque @6.6V : 1.6kg-cm Note: Product images/ Components brand may vary from actual product as our stock rotates.
Reference: RBD-0917
ROHS approved Mini Solar panel The solar cells are encased and protected by a durable outer poly frame Polycrystalline silicon Max work voltage:5V Max work current: 80ma Dimension: 60mm×60mmx3mm
Reference: RBD-2335
The Arduino Uno R3 Standard-Quality EditionMicro-controller : ATmega328.Operating Voltage : 5V.Input Voltage (recommended) : 7-12V.Digital I/O Pins : 14 (of which 6 provide PWM output).Analog Input Pins : 6We are pleased to present a more cost-effective version of the Arduino Uno R3, a widely acclaimed and versatile platform for electronics prototyping...
