Hemal Electronics

Hemal Electronics

Grant Road, Mumbai, Maharashtra


Humidity Sensor

Wholesale Trader of a wide range of products which include dht-11 humidity sensor, raspberry pi 4 black compact abs case, bc 847b smd npn transistor and 40 pin zif socket.

DHT-11 Humidity Sensor

  • DHT-11 Humidity Sensor
  • DHT-11 Humidity Sensor
  • DHT-11 Humidity Sensor

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Approx. Rs 100 / UnitGet Latest Price

Product Details:

Minimum Order Quantity10 Unit
Working voltage3.3 V - 5 V
Storage Temperature-25 ~ +130 Degree C
Weight38 g
Model NumberDHT-11
Humidity20-90% RH +- 5% RH

Features a calibrated digital signal output with the temperature and humidity sensor complex. Its technology ensures the high reliability and excellent long-term stability. A high-performance 8-bit microcontroller is connected. This sensor includes a resistive element and a sense of wet NTC temperature measuring devices. It has excellent quality, fast response, anti-interference ability and high cost performance advantages.

Each DHT11 sensors features extremely accurate calibration of humidity calibration chamber. The calibration coefficients stored in the OTP program memory, internal sensors detect signals in the process, we should call these calibration coefficients. The single-wire serial interface system is integrated to become quick and easy. Small size, low power, signal transmission distance up to 20 meters, making it a variety of applications and even the most demanding applications. The product is 4-pin single row pin package. Convenient connection, special packages can be provided according to users need.

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Raspberry Pi 4 Black Compact ABS Case

  • Raspberry Pi 4 Black Compact ABS Case
  • Raspberry Pi 4 Black Compact ABS Case

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Approx. Rs 150 / UnitGet Latest Price

Product Details:

Size/Dimension8 x 6 x 3 cm
Weight36 g
Current Rating200 mA
Voltage110 to 220 V
PhaseSingle Phase
Frequency50 to 60 Hz

This is a newly arrived very lightweight ABS case for Raspberry Pi 4 models. It is unassembled only 3-piece Smooth matt finished black ABS plastics case which provides adequate protection for your Pi and access to all the ports. The case is compatible with all the latest launched Raspberry pi 4 Models. It is very easy to assemble and de-assemble with accurately designed locking notches and 4 small screws to lock the case.

This case looks very premium with a round edge and accurate opening to each port of Pi 4. At the side, the case has a GPIO slot from which you can route GPIO and CSI ribbon cable and a cut-out to provide the ease the micro SD card insertion and removal.

Additionally, this case comes with three different aluminum heat sinks with adhesive tape for CPU SoC chip, Ethernet chip, and USB driver Chip and a rubber grip at the bottom. Exactly over the processor chip, there is a Cooling Fan slot and at the opposite side of USB ports, there is a nicely designed ventilation grill to provides ventilation to your pi for continuous operation.  This ABS Case for PI 4 is also designed so that you can see the Pi status LEDs clearly, and you need not put any effort into fitting the pi inside the case, it fits the pi accurately just like the mobile phone cover.

Specifications and Features:
  • Only 3-piece ABS case with access to all Ports on pi 4
  • Compatible for All variants of the Raspberry pi 4 Model B
  • Easy to assemble and highly durable material
  • Slots to route GPIO and CSI ribbon cable
  • Cut-out for micro SC card at the bottom panel locking screw holes and anti-slip rubber feet at the back.

Package Includes:
  • 1 x Acrylic Case for Raspberry PI 4 Model B with cooling Fan Slot
  • 3 x Heat Sink (for CPU, Ethernet, and USB chip)
  • 1 x Rubber Grips set
  • 1 x Screw Set

  • Raspberry Pi 4 board or Cooling fan is not included in the package.

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BC 847B SMD NPN Transistor

  • BC 847B  SMD NPN Transistor
  • BC 847B  SMD NPN Transistor
  • BC 847B  SMD NPN Transistor

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Approx. Rs 0.50 / PieceGet Latest Price

Product Brochure

Product Details:

Part NumberBC 847B
Transistor TypeNPN
Mounting TypeSurface Mount
Maximum Operating Frequency100 MHz
Maximum Operating Temperature+150 degree C
Maximum Power Dissipation200 mW
Pin Count6
Minimum Operating Temperature-65 degree C
Maximum Collector Emitter Saturation Voltage0.3 V
Number of Elements2 per Chip
Maximum Base Emitter Saturation Voltage0.755 V
Transistor ConfigurationIsolated
Maximum Collector Base Voltage50 V
Maximum Collector Emitter Voltage45 V
Maximum DC Collector Current100 mA
Maximum Emitter Base Voltage5 V

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40 Pin ZIF Socket

  • 40 Pin ZIF Socket
  • 40 Pin ZIF Socket
  • 40 Pin ZIF Socket

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Approx. Rs 75 / PieceGet Latest Price

Product Details:

Minimum Order Quantity25 Piece
Number of Pin40 Pin
Model NumberFZ0441
Size6 X 3 X 3 cm
Gross Weight0.031 kg

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