Month: November 2017

2 Channel Relay Shield for Arduino UNO Circuit and PCB layout

2 Channel Relay Shield for Arduino UNO Circuit and PCB layout

2 Channel Relay shield for Arduino UNO can be used in several applications like remote control, on/off AC or Dc load and any circuits which required isolated high current and high voltage. Relay 1 connected to Digital pin D2 and Relay 2 can be controlled through D12 of Arduino PIN. Both relay has optocoupler in input for isolation which protect Arduino from any EMI noise and complete isolation between high volt/current at relay outputs.  Relay shield required separate 12V DC. Two LED indicate the Relay operations. J1,J2 provided In case single supply for relay and Arduino required.

  • Input: 12 VDC @ 84 mA
  • D2 and D12 Arduino connected to Relay inputs
  • Solder PCB Jumper J1 and J2 if Shield and Arduino need common supply
  • High TTL Signal Required to Trigger the Relay
  • Output: Two SPDT relay
  • Relay specification: 5 A @ 230 VAC
  • Trigger level : 2 to 12 VDC
  • Header connector for connecting power and trigger voltage
  • LED on each channel indicates relay status
  • Power Battery Terminal (PBT) for easy relay output connection

 

 

 

 

 

17 Channel Optically Isolated I/O Shield for Arduino Uno Using LOC111, PC817,6N137 Opto-couplers

17 Channel Optically Isolated I/O Shield for Arduino Uno

The shield enables you to  interface many things to Arduino Uno , all I/O are optically isolated, The shield consist  8 Channel low speed outputs which can be used for on/off applications. 3 Channel high speed outputs frequency up to 10 MHz using 6N137. 4 Channel slow inputs using PC817 opto-coupler. One high speed input frequency up to 10 MHz using 6N137, and one analog voltage input using LOC111 IC. Board provided with multi option isolated i/o line to integrate multiple sensors and other things.

Features

  • Supply 5V DC
  • 8 Low Speed Outputs for On/Off Slow Operations Using PC817
  • Slow Outputs Connected to Digital Pins D2,D3,D4,D5,D6,D7,D12,D13
  • 3 Channel High Speed Outputs Frequency Upto 10Mhz Using 6N137 Optocoupler
  • 3 High Speed Outputs Connected to PWM Pins D9,D10,D11
  • 4 Channel Low Speed Inputs Connected to Analog Pins A1,A2,A3,A4 (PC817)
  • 1 Channel High Speed Input Connected to Digital Pin D8 Frequency Up to 10Mhz
  • 1 Channel Analog Voltage Input 0 To 5V 

 

PDF Schematic

 

 

 

 

 

LM386 SMD AUDIO AMPLIFIER CIRCUIT

The Tiny Audio Amplifier MODULE  is a good choice for battery operation. It is based on  LM386 IC, useful in various applications like robotics, science projects, intercom, FM radio and many more.

  • Power Supply 6V-9V
  • 300mW Output @ 8Ohms Load
  • On Board Potentiometer for Audio Level Adjust
  • Header Connecter for Supply, Signal in and Speaker
  • On Board Power LED
  • Input: Standard Audio Signal