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…
================== W A R N I N G ! ! ==================== Li-Ion batteries are very dangerous if not handled properly. Use them only with proper protection circuits and chargers. DO NOT OVER CHARGE / BURN / OPEN Li-Ion Bats Using any of the informations available on esp8266-projects.com is on your 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…
Just a quick one about new goodies found in the MailBox : External protective envelope Envelope in Bulgarian language:) Have you ever heard about Bulgaria? Is a country in southeastern Europe, member of the European Union, NATO, and the Council of Europe. And why are we interested about? It’s a Read more…
New version here: http://esp8266-projects.org/2015/03/internal-adc-esp8266/
Now, with a nice and powerful 12 bit DAC working on our ESP8266 CBDB Board ( see Part 1 ) let’s test it to the limit a little bit. As you will see from the Oscilloscope and DMM images below, MCP4726 DAC Output it’s nice, smooth and stable. Not bad Read more…