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Posts Tagged ‘real time clock’

App note: Intelligent lighting controller measures ambient light and tracks time

Sunday, June 23rd, 2019

Implementation on ambient light and time tracking luminaires controller from MAXIM Integrated, Link here This reference design explains how to design an intelligent lighting controller that senses and measures the ambient light level with an ambient light sensor (ALS). Equipped with a real-time clock (RTC), the controller also knows when...

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Posted in app notes | No Comments »

A look inside the DS3231 real-time clock

Thursday, August 10th, 2017

Pete posted an article taking a closer look at Maxim's DS3231 real-time clock: Fortunately, Maxim also offers the DS3231, which is advertised as an “Extremely Accurate I2C-Integrated RTC/TCXO/Crystal”. This chip has the 32kHz crystal integrated into the package itself and uses a built-in temperature sensor to periodically measure the temperature...

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Posted in Chips, reversed | No Comments »

Using a $2 DS3231 RTC & AT24C32 EEprom from eBay

Friday, January 15th, 2016

From the comments on our 'Using DS1307 and DS3231 real-time clock modules with Arduino' post, Edward Mallon writes: I’ve been putting the $1 DS3231 boards through their paces for quite a while now…and they have been performing well. More details at Edward Mallon's blog. Via the comments.

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Posted in hacks | 8 Comments »

App note: Debugging stand-alone real-time clock/calendar-based applications

Saturday, March 15th, 2014

Here's an application note from Microchip:  Debugging stand-alone real-time clock/calendar-based applications  (PDF!) An increasing number of applications require Real-Time Clock/Calendar (RTCC) devices. Microchip’s RTCC’s (I2C™ and SPI) are feature-rich devices that incorporate EEPROM, Time/Date registers, Time-Stamp registers, alarm modules, SRAM, a watchdog timer, and event detect modules, making them useful in...

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Modified Arduino DS1307RTC library that also works for MCP7940N

Monday, December 23rd, 2013

Ray writes, "When your project needs a real-time clock (RTC), don't you hate that the popular DS1307 costs several dollars? I recently came across Microchip's MCP7940N, which is an inexpensive alternative to DS1307. On the hardware side it is pretty much a drop-in replacement (although Microchip recommends adding several extra...

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Posted in Arduino, code, components | 6 Comments »

Using Bus Pirate to program I2C RTC

Wednesday, December 11th, 2013

[embed]http://www.youtube.com/watch?v=eWoG4V59R0M[/embed] @FrozenElecBlog tweeted,  "Just published a video about the Bus Pirate -- love this thing!!!"

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Posted in Bus Pirate | No Comments »

RTCSetup – Real Time Clock setup tool

Sunday, December 1st, 2013

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Posted in code, open source, tools | 1 Comment »

Chip note: MCP7941X I2C RTCC with EEPROM, SRAM, Unique ID and Battery Switchover

Saturday, March 19th, 2011

Microchip's MCP79411 general purpose I2C™Compatible real-time clock/calendar (RTCC) is highly integrated with nonvolatile memory and advanced features including a battery switchover circuit for backup power, a timestamp to log power failures and digital trimming for accuracy. It can use a low-cost 32.768 kHz crystal or other clock source and the...

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Posted in Chips, documentation, PIC | 1 Comment »

Recent Comments

  • Joe Desbonnet: Ya, I can recommend the low melting point solder. I used brand 'ChipQuik' and it's amazingly easy to use.
  • Jerome: I need a new BusPirate for the Fablab ;) Many thanks!
  • Max: Seems like an unexpectedly violent way to remove the chip indeed. A hot air station should of course do the job just fine, but in...
  • jose: Part removal described here is pure butchery, the cheapest hot air station will do a fast and clean job removing the QFP, heat air to...
  • Cody: Yes please