Arduino alarm system with delay at startup
I put a keyboard for activate and deactivate an alarms system with Arduino board and PIR sensor. My schematic is: and sketch is alarm_system_2a.ino ! My alarm work in next steps: – after power...
Category: Arduino
Accesspoint – Station Communication without Broken Link Between Two ESP8266 MCUs
I find article named Accesspoint – Station Communication Between Two ESP8266 MCUs and I tested because need just 2 development board with ESP8266 and power supply for them. After few tests, I discover broken...
Toy Elevator
My friend Tom made a toy house with elevator… and I writted an Arduino sketch for toy elevator with 3 stations. First, I design schematic: This schematic has: 3 buttons 3 limit switch 3...
Clock with adjust, thermometer & voltmeter on KTM-S1201 lcd display
In an old article from my Romanian blog I test an vintange lcd 12-digit 7-segment named KTM-S1201 who use UPD7225 driver… Now I made an adjusting clock with DS18B20 thermometer an 20V DC voltmeter....
Adjusting clock on 128×64 monochrome display (ST7920)
Using 128×64 monochrome display with ST7920, I made an adjusting RTC clock based on Arduino board. I use this schematic for my clock: Part for adjusting clock is from Doz’ Blog. I use u8glib...
Control Arduino board with Python graphic interface
I want to control outputs Arduinop board thru graphic interface, so I study and a simple solution is to use Phyton (see about this programming language at https://en.wikipedia.org/wiki/Python). For install and configure Python 2.7.x, I...
Solve problem with “511” at W5100 Ethernet shield
I have an W5100 Ethernet shiled who work ok in home network, but notwork in other network, so I search about this problem and find solution. In my case, manufacturer put a wrong value...
RTC clock with manual adjust & alarm, thermometer & higrometer using Arduino
I use led display named LFD080AAG-103-01 (4-digit 7-segment common cathode) For RTC clock I use DS1307 homemade module, but works without changes with DS3231 module. For thermometer and higrometer it use DHT11 sensor, but with a...
0-30V/0-7A Power Supply Unit with LM723 and Arduino volt & ampermeter
Dragos, known under albasete name from elforum (romanian electronic forum) made an useful power supply unit. Schemtic used by albasete is Original schemtic is from Reber electronic site (3A NAPAJALNIK NASTAVLJIV OD 1V DO 27V article). Also, I found same data in article 1V-27V...
Homemade Arduino (Arduiniq ver.3.0)
If you need to use Arduino shield on your projects must use an Arduino Uno or Arduino Mega boards or made your Arduino style development board. Schematic and board was designed using (Autodesk) Eagle PCB...
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