Je me suis inspiré de la vidéo de Bertrand, Electro-Bidouilleur, EB_#143 Construction: Un Déchargeur de Condensateur
La seul différence est que j’ai rajouté un pont de diode pour permettre de déchargé les condensateurs dans se soucié de la polarité, car je n’avais pas de LED bicolore…
A small gadget to monitor the power supply and enclosure temperature of your Raspberry.
My Raspberry Pi server host a OpenVPN service, Onion Pi Tor proxy access point, and EasyIOT.
The power supply come from a old Pc, and the enclosure from a plexi-glass slab.
It’s based on Arduino, so there is no schematic, sketch is available here, it’s just a Atmega328P with a DS1820 temperature sensor,
analoginput A0 is used to monitor Vcc power supply through a voltage divider.
I2C interface for LCD2x16 is wired to A4/A5 pin. You will need <LiquidCrystal_I2C.h>, <OneWire.h> libraries.
You can defined the threshold in the code, to monitor Vcc value, more or less than 5 volts for example, that the same for temperature.
Alert will be displayed on the screen, also a digitalwrite() (choice what pin you want), can drive a fanless, LED, relay to off the power-supply, or drive a Raspberry I/O pin (emergency power-off, email alert …)
Again, a FM radio project based on Si4703 breakout board with Arduino, for your bench-work, bathroom … you can listen your programmed favorites radio station, build’s very simple, The breakout provides access to SDIO and SCLK for I2C communication while RST can be used for easy resetting. I use Arduino 3.3v@8Mhz, audio output is wired to Mini PAM8403 5V 2Channel USB Power Audio Amplifier with volume Control board, (1$ on ebay), a simple push button is dedicated to change station quickly by a simple « press », Continuer la lecture de Si4703 small simple FM radio with Arduino
This is an easy way to power an highly brightness LED for 10 hours, some parts are recycled or was buy from ebay for 1$ or less …
– Solar panel 5v – 0.5A (ebay)
– 5V Mini USB 1A TP4056 Lithium Battery Charging Board (ebay)
– LM2596 DCDC Converter (ebay or dx.com)
– A Li-On 3.7V batteries (recycled from old phone)
– A photo-resistor, 10k pot meter, 1K resistor pull down, highly brightness 10mm LED (white warm), cables, and small box…
Continuer la lecture de Revive an old garden lamp with a solar panel
