Pull Up / Pull Down Resistor board

Other Hardware LEDs and Multiplexing
1

Hi everone - first post - Ive found everything else need, but iM looking for A Pull Up / Pull doen (PUD) resistor board.
My applications will use lots of push buttons and LEDs for mimics, all of which need a Pull-up or (occasionally and) pull-down resistor.
Asside from doing this my self using breadboard and solder I can't find anything off-the self anywhere that will save time and effort..
A 16 channel off-the-shelf PUD board would have (for each Audrino iinput/output).

  • input/output pin.
  • 2 pins for connector to I//O device and back.
  • A pin to join a channel to adjacent channel (some outputs have a pull-up and pullown combined for output or NOT output).
    -- Two holes to solder the resistor of my choice in - typically 1k ohmns (pushbutton) or 330 ohmns (3v LED) - though ohms law determined the exact values.
  • A set of 3 pins to host a 2 pin jumper on ( left = signal to ground, right = signal to VCC (typically + 5V.

But I cant find anything, NADA, not a sausage.
Has anybody found an off the self board that can do the job?

2

For switches you can set the pinMode to INPUT_PULLUP and wire the switch between the Arduino input pin and Gnd.
I'm not aware of any general purpose pull up / down resistor boards.
You can get prototype boards laid out like a breadboard:

image
image455×777 74.8 KB

3

The Arduino has built-in pull-up resistors that can be enabled.

(There are now lots of different Arduinos and I'm not sure if they all have it.)

4

Tell us, please - which Arduino?

5

I'm wanting to use the Nano. Not sure about what Arduino Dave is refering too though.

6

This is what I was thinking I woukd have to use.

7

Nano has them built in, check this doc'n. NOTE: There are some conditions where the built-in resistors may not work well, so then an external one would be used, BUT not in parallel.
https://docs.arduino.cc/language-reference/en/functions/digital-io/pinMode/

8

That narrows it down to about seven totally different ones.
Leo..

9

R3 Arduino version.

10

Thanks for this - thats an option for Pull-ups.

11

Yep, that's all you need for switch types.

12

You can get a 9 pin resistor pack, where all the resistors have a common lead. Connect this lead high and all the resistors are pull up resistors. Connect it low and they all pull down.

See this page:-
https://uk.farnell.com/bourns/4609x-101-272lf/resistor-network-2k7/dp/9356959?iscrfnonsku=true

Note in the U.S. Farnell are known under the name Newark.

Other values of resistor are available.

Also other types of resistor configurations are available like the picture below:-

Resistor packs
Resistor packs1652×1350 370 KB

The type of resistors I posted a link to are of the 101 design.

13

Thanks for this - simplifies things.

14

Internal pull-ups are, to my knowledge, standard on all boards. There are a number of boards that support internal pull-downs. Below is a search through the installed board packages on my system for input_pulldown.

"C:\Users\bugge\AppData\Local\Arduino15\packages\arduino\hardware\esp32\2.0.18-arduino.5\cores\esp32\esp32-hal-gpio.h"
"C:\Users\bugge\AppData\Local\Arduino15\packages\arduino\hardware\mbed_giga\4.2.4\cores\arduino\api\Common.h"
"C:\Users\bugge\AppData\Local\Arduino15\packages\arduino\hardware\mbed_giga\4.2.4\cores\arduino\as_mbed_library\pinmode_arduino.h"
"C:\Users\bugge\AppData\Local\Arduino15\packages\arduino\hardware\mbed_giga\4.2.4\variants\GENERIC_STM32H747_M4\pinmode_arduino.h"
"C:\Users\bugge\AppData\Local\Arduino15\packages\arduino\hardware\mbed_giga\4.2.4\variants\GIGA\pinmode_arduino.h"
"C:\Users\bugge\AppData\Local\Arduino15\packages\arduino\hardware\mbed_nano\4.2.4\cores\arduino\api\Common.h"
"Arduino15\packages\arduino\hardware\mbed_nano\4.2.4\cores\arduino\as_mbed_library\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_nano\4.2.4\variants\ARDUINO_NANO33BLE\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_nano\4.2.4\variants\NANO_RP2040_CONNECT\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_nicla\4.2.4\cores\arduino\api\Common.h"
"Arduino15\packages\arduino\hardware\mbed_nicla\4.2.4\cores\arduino\as_mbed_library\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_nicla\4.2.4\variants\GENERIC_STM32H747_M4\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_nicla\4.2.4\variants\NICLA\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_nicla\4.2.4\variants\NICLA_VISION\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_opta\4.2.4\cores\arduino\api\Common.h"
"Arduino15\packages\arduino\hardware\mbed_opta\4.2.4\cores\arduino\as_mbed_library\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_opta\4.2.4\variants\GENERIC_STM32H747_M4\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_opta\4.2.4\variants\OPTA\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_portenta\4.2.4\cores\arduino\api\Common.h"
"Arduino15\packages\arduino\hardware\mbed_portenta\4.2.4\cores\arduino\as_mbed_library\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_portenta\4.2.4\variants\GENERIC_STM32H747_M4\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_portenta\4.2.4\variants\PORTENTA_H7_M7\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\mbed_portenta\4.2.4\variants\PORTENTA_X8\pinmode_arduino.h"
"Arduino15\packages\arduino\hardware\megaavr\1.8.8\cores\arduino\api\Common.h"
"Arduino15\packages\arduino\hardware\renesas_uno\1.4.1\cores\arduino\api\Common.h"
"Arduino15\packages\arduino\hardware\samd\1.8.14\cores\arduino\api\Common.h"
"Arduino15\packages\CubeCell\hardware\CubeCell\1.5.0\cores\asr650x\Arduino.h"
"Arduino15\packages\CubeCell\hardware\CubeCell\1.5.0\cores\asr650x\cores\ASR_Arduino.h"
"Arduino15\packages\CubeCell\hardware\CubeCell\1.5.0\cores\asr6601\base\ASR_Arduino.h"
"Arduino15\packages\esp32\hardware\esp32\3.2.0\cores\esp32\esp32-hal-gpio.h"
"Arduino15\packages\esp32-bluepad32\hardware\esp32\4.1.0\cores\esp32\esp32-hal-gpio.h"
"Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266\Arduino.h"
"Arduino15\packages\heltec-esp32\hardware\esp32\3.0.2\cores\esp32\esp32-hal-gpio.h"
"Arduino15\packages\m5stack\hardware\esp32\2.1.4\cores\esp32\esp32-hal-gpio.h"
"Arduino15\packages\MegaCoreX\hardware\megaavr\1.1.3\cores\coreX-corefiles\api\Common.h"
"Arduino15\packages\SparkFun\hardware\apollo3\2.2.1\cores\arduino\mbed-bridge\core-api\api\Common.h"
"Arduino15\packages\teensy\hardware\avr\1.59.0\cores\teensy3\core_pins.h"
"Arduino15\packages\teensy\hardware\avr\1.59.0\cores\teensy4\core_pins.h"
"Arduino15\packages\teensy\hardware\avr\1.59.0\libraries\RadioHead\RHutil_pigpio\RasPi.h"
"Arduino15\packages\teensy\hardware\avr\1.59.0\libraries\RadioHead\STM32ArduinoCompat\wirish.h"

You need some background knowledge to know to which boards this list applies.

Grumpy_Mike's resistor arrays is more universal :+1:

15

The classic Nano v3 has built-in pull up, even on the first six analogue pins.
There is no reason to use external resistors with switches.
Just enable the interal pullup in setup() with pinMode(pin, INPUT_PULLUP);
and wire the switch between pin and ground.
The pin now reads LOW when the button is pushed
Leo..

16

Great information Thanks.