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Use this relay board with your Arduino, Raspberry Pi or your custom micro-controller projects!

• Each Relay has LED indication when ON
• SPDT Relays with terminal block outputs.
• Relay Coil voltage: 5 VDC
• Power Requirement: 5 VDC
• 10A 250V AC / 10A 30V DC

• 1 x Four channel 5V DC Relay Module

• Interfacing with a relay : https://tutorials-raspberrypi.com/raspberry-pi-control-relay-switch-via-gpio/

This lovely little (14.2mm) seven segment display provides excellent segment uniformity and is highly visible up to seven meters away. It's ultra bright, and provides great readability even in bright ambient light!

It has four digits and a decimal point on each digit, designed for numeric output, so you can use it to add a clock, timer or counter into your next project.

These displays are multiplexed, common-cathode. What that means it that you can use a 74HC595 or just 8 microcontroller pins if you can spare them to control the 8 anodes (7-seg decimal) at about ~15mA each, and then connect NPN transistors or a TPIC6B595 to the cathodes to sink the 8*20mA = ~120mA maximum per digit.

This is an ultra bright RED colour.

Specifications

• 100mcd
• 14.2mm (0.56") digit height
• Color: red (630nm)
• Common cathode display
• Maximum power dissipation per segment: 66mW
• Maximum pulse peak forward current per segment (1/10th duty cycle, 0.1ms pulse width): 100mA
• Maximum forward current per segment: 20mA
• Maximum reverse voltage: 5V
• Maximum reverse current: 20µA
• Typical forward voltage: 2.1V at 20mA
• Maximum forward voltage: 2.5V at 20mA
• Operating temperature range: -30°C - 70°C
• Typical luminous intensity: 20mcd

Use Four Letter pHAT to display... four letter words. Not that sort!

Pi ZERO and case not included!

Four Letter pHAT has four 14-segment displays that you can use to display text, numbers, and a host of other characters. Its LEDs are a beautiful retro green, just like you old digital alarm clock. They're driven by the HT16K33 chip over I2C.

It's perfect as a readout for your projects, displaying temperatures, times, etc. and becomes really useful when combined with some of our other boards like Enviro pHAT or Explorer pHAT to display their sensor values.

Features

• Four 14-segment displays with green LEDs
• HT16K33 driver chip
• Compatible with Raspberry Pi 3, 2, B , A , Zero, Zero W
• Python library
• Female header and display pins require soldering

Software

Our handy one-line installer will install the Four Letter pHAT Python library for you. We've included a bunch of examples too, to show off what you can do with Four Letter pHAT; things like a clock, a countdown timer, or CPU activity monitor.