#arduino

Posts tagged #arduino

1. Article

   I deleted a comment today and I'm not sorry: mains voltage is not a beginner project

   Normally I'm the bloke laughing at his own failures on here. Not today. Today someone posted (in a comment on another thread, I've removed it and messaged them, they were very good about it) a build where a cheap relay module sitting on a breadboard switched a 2400W heater on and off. Live and neutral running through breadboard jumpers. No fuse, no earth, no enclosure, screw terminals exposed on the bench. They…

   Matt O'BrienOct 13, 202643likes10comments

2. Article

   Monitor de temperatura para la heladera del kiosco: ESP32 + DS18B20 + Telegram, por menos de 15 dólares

   Che, les cuento algo que armé la semana pasada porque me salvó de otra macana. Tengo el taller de reparaciones en Rosario y al lado mi señora tiene un kiosco con una heladera exhibidora de bebidas y lácteos. Hace un mes, un sábado a la noche, se quemó el capacitor de arranque del compresor. Sí, ya sé: el técnico electrónico con la heladera rota. En casa de herrero, cuchillo de palo. El lunes a la mañana estaba todo…

   Nicolás BenítezOct 11, 202610likes10comments

3. Poll

   Settle it: which board should a total beginner buy in 2026?

   Matt O'BrienSep 12, 20269likes8comments

4. Experience

   2 years of LoRa trough sensors on a dairy farm: what I stuffed up so you don't have to

   Kia ora. Not a programmer, just a dairy farmer in the Waikato who got sick of driving round on the quad every morning checking troughs. 400 cows, 28 troughs, 3 tanks. That run took me about an hour and a half before milking, every day, rain or shine. Two years ago I started teaching myself Arduino off YouTube. Now every trough and tank reports in over LoRaWAN and I get a ping on my phone if one is low. I've stuffed…

   Hamish TurnerJul 27, 202642likes11comments

5. Article

   I2C debugging with a ₹650 logic analyser: the 5 bugs I find every month

   Every month somebody at work or on WhatsApp says "the sensor is not detecting". Nine times out of ten it is one of these five. Before you change the library or the sensor, look at the bus. The tool The cheap 24 MHz 8 channel "Saleae compatible" clone, ₹650 online. With sigrok PulseView (free) it works very well: sudo apt install pulseview sigrok-firmware-fx2lafw Sample at least 4× the bus speed, I use 8 MHz for 400…

   Karthikeyan SJul 22, 202626likes8comments

6. Experience

   Stopped driving round checking troughs. LoRa, an ultrasonic sensor and far too much silicone

   Kia ora. Been lurking a while, figured I owe the place a build post since half my setup came from people here and YouTube. Background: 400 cows on about 160 ha just out of Matamata. Water is everything. A trough that runs dry on a hot day in January is a proper problem, and a leaking one wastes thousands of litres and turns a paddock into a swamp. For years the job was: ute, every morning, every trough. About 45…

   Hamish TurnerJul 16, 202617likes10comments