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PUD HAT (Pull-Up/Down Resistor HAT)

Product Code:MMP-0897

Ex.Tax £7.92

Availability: 157

PUD HAT (Pull-Up/Down Resistor HAT)
PUD HAT (Pull-Up/Down Resistor HAT)
PUD HAT (Pull-Up/Down Resistor HAT)
Questions1 Answers1 | Expand All
What is the middle set of connectors for?
I want to daisy chain off another board. If I use the middle connector does it bypass the resistors?
  • The pins on "JP2" are where you plug your devices/sensors into. These pins are current limited, they have a 1k resistor inline. This protects the Raspberry Pi from sinking/drawing too much current.

    You can bypass these current protection resistors by plugging into the pins on "JP1" though (not recommended)

    Both JP1 and JP2 are pulled up or down (depending on jumper configuration)

    ModMyPi LTD
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Whether you're pulling-up or pulling-down, there's no need to frown! With the PUD HAT from ModMyPi, adding multiple pull-up or pull-down resistors to your Raspberry Pi project is easy! The PUD HAT is an expanded version of the smaller PUD board.

If you want to detect an "output" with your Raspberry Pi, like a button being pressed or a motion sensor detecting movement, we can configure our Raspberry Pi's GPIO pin as an "input". That input pin can be in three states (known as Tri-State logic); "high", when 3.3V is applied, "low", when the pin is connected to 0V, and "floating" when the state is undefined. Floating voltages are troublesome in electronics as the input can either read high or low depending on various fluctuations in electrical noise. Like a gate flapping open and closed in the wind, someone needs to lock the gate closed, or wedge it open. If you leave it flapping, it's likely to hit someone on their bottom on the way through!

Like our gate, the best way to avoid a floating input is to "tie" your input pin either high or low to create a default state. This is usually achieved through the use of a pull-up or pull-down resistor, either connecting our input pin via a resistor to the Pi's 3.3V to achieve a 3.3V high state, or the GND line to achieve 0V low state.

Our PUD HAT takes the messy wiring out of adding a pull-up or pull-down resistor to your circuit. Simply wire up the sensor output to the single pin on the PUD HAT and add a shunt jumper to either pull up (u) or down (d)! Therefore when you apply a signal voltage from your sensor or switch, the Pi is easily able to sense into which logic state the pin has been pulled! No more trouble from floating I/O's, the PUD HAT adds a jumper configurable pull-up or pull-down 10kΩ resistor to 26 of the Pi's GPIO pins.

The product comes fully assembled with our push-fit "plug & play" Single Shroud HeaderSocket Header, and 14mm HAT Mounting Kit, so there's no soldering required.
The PUD HAT Features:
  • Add a pull-up or pull-down resistor to your GPIO with the swap of a jumper!
  • Compatible with all Raspberry Pi Models Inc. A+/B+/2/3/3B+ & Zero/ZeroW
  • HAT compliant layout is easy to integrate into any Raspberry Pi Project
  • Uses SMT Socket Header & 40 Pin Extra Tall "Single Shroud" Header
  • Includes 14mm Mounting Kit
  • Fully Assembled - No Soldering Required
  • In-line 1kΩ current limiting resistors on each GPIO
  • 10kΩ pull-up or pull-down resistors on each GPIO
  • All 26 GPIO pins can be configured independently 
  • Includes 26 x 2 Pin Shunt Jumpers & 1 x PUD HAT
  • Jumper configurable pull-up or pull-down resistor on pins:
    • 3 (BCM 02)
    • 5 (BCM 03)
    • 7 (BCM 04)
    • 29 (BCM 05)
    • 31 (BCM 06)
    • 26 (BCM 07)
    • 24 (BCM 08)
    • 21 (BCM 09)
    • 19 (BCM 10)
    • 23 (BCM 11)
    • 32 (BCM 12)
    • 33 (BCM 13)
    • 8 (BCM 14)
    • 10 (BCM 15)
    • 36 (BCM 16)
    • 11 (BCM 17)
    • 12 (BCM 18)
    • 35 (BCM 19)
    • 38 (BCM 20)
    • 40 (BCM 21)
    • 15 (BCM 22)
    • 16 (BCM 23)
    • 18 (BCM 24)
    • 22 (BCM 25)
    • 37 (BCM 26)
    • 13 (BCM 27)
  • To pull pin up, connect the jumper across "u" and the center pin
  • To pull pin down, connect the jumper across "d" and the center pin


How to use the ModMyPi PUD HAT

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