Tag Archive for "2 IN and 2 OUT DTMF"

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GSM Remote Control – 2 IN and 2 OUT DTMF
Part 1 – Introduction
Excellent to remotely control via GSM the activation of engines, lightening or watering systems and alarm systems. It sends commands through SMS as well as with DTMF dual tones and allows you to check if they were...
- Posted 10 years ago
- 0
GSM Remote Control – 2 IN and 2 OUT DTMF
Part 2 – Schematic
Let’s now look into the schematic diagram; in it you can note the usual Microchip microcontroller governing the GSM/GPRS module activity, controlling the logical condition of the two opto-isolated inputs and managing the two relays. Moreover, the...
- Posted 10 years ago
- 4
GSM Remote Control – 2 IN and 2 OUT DTMF
Part 3 – Assembly
On the construction perspective, the remote control does not present many difficulties, just the obvious ones that appear when working with circuits requiring superficial assembly components. As usual, there is a PCB with double plating where...
- Posted 10 years ago
- 0
GSM Remote Control – 2 IN and 2 OUT DTMF
Part 4 – SMS Command
The set of commands of this remote is divided into two categories: the SMS ones and the DTMF tones. The former are simply summarized in the corresponding table, since they are the same as the ones described...
- Posted 10 years ago
- 0

NEXTION: the touch screen
LCD color and high-performance touch screens can work with...
- Posted 1 month ago
- 0
12V Light Control Switch
Simple circuit able to automatically activate a load (lamps, etc.)...
- Posted 2 months ago
- 0
2 Channel DC Motor Driver Module
This DRV8833 dual H-bridge motor driver is the substitution of...
- Posted 2 months ago
- 0
Driver 1 DC 6-27V – 43 A motor
Driver for bidirectional control of a DC motor with a...
- Posted 2 months ago
- 0
1.44 Inch Color TFT Module ST7735
This is a 1.44″ IPS LCD full-color display with a...
- Posted 2 months ago
- 0
uChip: Arduino Zero compatible in a narrow DIP-16 package (headers NOT SOLDERED)
A very small narrow-DIP-sized, Arduino Zero compatible USB dev board...
- Posted 2 months ago
- 0
uChip: Arduino Zero compatible in a narrow DIP-16 package (headers already soldered)
A very small narrow-DIP-sized, Arduino Zero compatible USB dev board...
- Posted 2 months ago
- 0
UVC Strip with 4 UVC LED
Rigid bar with 4 UVC LEDs ideal to sterilize and sanitize surfaces...
- Posted 2 months ago
- 0

Getting Started with the ESP32
This article is a getting started guide for the ESP32...
- Posted 11 months ago
- 0
PCB CAD, A SELECTION GUIDE
Getting to know and evaluate the software offer for PCB,...
- Posted 2 years ago
- 0
The world of GIThub
Let’s learn all the aspects of the most renowned...
- Posted 2 years ago
- 0

Here are the Winners from the 3Drag 3d printing contest
Here we are, eventually the contest has come to an...
- Posted 6 years ago
- 0
Updates from the 3Drag 3dprinting contest: Roland Hoffert’s Hacks
Roland Hoffert, from www.eytec.de, submitted us this 3Drag (Velleman K8200...
- Posted 6 years ago
- 0
Updates from the 3Drag 3dprinting contest: Karl Seiss’s Hack
Karl Seiss from Austria made a very clever hack to...
- Posted 6 years ago
- 0
Updates from the 3Drag 3dprinting contest: Fa)(a from Giacomo Falaschi
Giacomo Falaschi sent us his Falla3D new printer project: you...
- Posted 6 years ago
- 0

The Open Source community united against Covid-19
On March 11, WHO (World Health Organization) officially declared the...
- Posted 6 months ago
- 0
Coronavirus: Now Is The Time For Solidarity
The moment we are living, in China before and all...
- Posted 7 months ago
- 0
5 Types of Industrial Flowmeter
In an industrial setting, the use of flow meters...
- Posted 7 months ago
- 0
The Best Gadgets for Seniors That Will Help Improve Their Everyday Lives
The majority of adults would, for the most part, rather...
- Posted 1 year ago
- 0

Arduino ISP (In System Programming) and stand-alone circuits
We use an Arduino to program other ATmega without...
- Posted 9 years ago
- 224
Arduino GSM shield
This is a very low...
- Posted 10 years ago
- 218
Localizer with SIM908 module
The device is based on a GSM/GPRS module with...
- Posted 8 years ago
- 185
GSM GPS shield for Arduino
Shield for Arduino designed and based on the module...
- Posted 8 years ago
- 181
Small Breakout for SIM900 GSM Module
Some post ago we presented a PCB to mount...
- Posted 9 years ago
- 115