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phone busy

Phone Busy Indicator


This simple circuit gives a clear indication when the phone is use - handy for those who still need dial-up for Internet access.


clock module

Tiny Real Time Clock (RTC) I2C module - DS1307 AT24C32 TE187


An article on a DS1307 based I2C module which can be used with Arduino programmable microcontrollers. These seem to be sold with non-rechargeable batteries, but charging circuitry for rechargeable batteries, which means some work is needed to improve the battery utilization.


BBC News - Technology RSS feed

Dark Overlord hacker pleads guilty
22/09/2020 10:46 AM
Microsoft buys Fallout creator Bethesda for $7.5bn
21/09/2020 05:08 PM
TikTok deal under new threat as Trump insists on total US control
21/09/2020 03:46 PM
Twitter investigates racial bias in image previews
21/09/2020 11:43 AM
Amazon criticised over 'Black Lives Don't Matter' caps
21/09/2020 11:34 PM
WeChat: Judge blocks US attempts to ban downloads of Chinese app
20/09/2020 07:03 PM
The tech putting the beef into Australian cattle farming
21/09/2020 05:08 AM
Airbus looks to the future with hydrogen planes
21/09/2020 06:39 PM
Internet: Old TV caused village broadband outages for 18 months
22/09/2020 08:10 AM
TikTok: Trump says Oracle deal for video app 'has my blessing'
20/09/2020 06:44 AM

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