Working last days on the driver for MAX7219 8 digit display module I found that dtostrf() ESP8266 STDLIB function is not working properly for values containing “0”‘s after dot, like: 1.0256,1.00256, etc. With the quick written test code from below and the collaboration of the great guys from Arduino.cc Forum Read more…
As you know from my previous Article I got recently some nice MAX7219 8 Digit Display Modules. Had a lot fun fun with them, looks a nice and stable solution so I’m thinking to use them as Display for one of my future projects. Meanwhile I was also playing with Read more…
UPDATE!! UPDATE !! New released MPDMv4 (MAINS Power Dimmer) Driver Board ! ————————————————————————————————————————– WARNING!! You will play with LIVE MAINS!! Deadly zone!! If you don’t have any experience and are not qualified for working with MAINS power I will not ecourage you to play arround! —————————————————————————————————————————- Remember the story Read more…
As you remember from our previous article about DS3231 RTC Module, we have identified onboard an EEPROM chip, a 32k AT24C32 one. It is independent from the RTC circuit and conected on the I2C bus, perfect companion for a Data Logger System 🙂 AT24C32 EEPROM The AT24C32 provides 32,768 Read more…
I was asked if MCP9008 Temperature sensor can be replaced with the less precise but widely available LM75 one. The answer is YES, it can be done without any problems, actually they can share same slot on CBDB Dev Board without any hardware changes, just choose your desired I2C address Read more…
Today subject might look a trivial one but is not. At all. I will try to keep it as easy to understand as possible without too much “behind the scene” theory. Contact bounce is a common problem with mechanical and electromecanical switches, relays, solenoids, etc. Switch contacts are Read more…
New goodies hit my MailBox, this time from Singapore : Let’s see what’s inside. Short but nice documentation including, schematics, pinout, configuration: YES! It’s a new breadboard adapter for ESP-07 or ESP-12 ESP8266 WiFi module, designed by Baoshi a box containing the module nice packed in antistatic bag. Read more…
One of the desired and also needed things in many projects is the availability of a local display to be able to directly see messages, values, results, etc. What we will need to be able to easy interface it with ESP8266 module is a 3V logic level compatible one and Read more…
——————————— NEW UPADTE —————————————- Added also a new example for a 0-5V input range with Voltage divider and LSB calculation, “the easy way”: ESP8266 internal ADC 2 – the easy way example ———————————- UPDATE ————————————– For a ADC Input Frontend with Auto-range capabilities in the 0-40V Input range take a look Read more…
It’s time for TIME!I was delaying this article about RTC’s despite de fact that was higly requested with the hope that the ordered DS3231 modules will arrive in time. Didn’t happen, so, until they will hit my MailBox I am presenting you an alternate solution, an RTC chip used before Read more…