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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

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Twitter investigates racial bias in image previews
21/09/2020 11:43 AM
Amazon criticised over 'Black Lives Don't Matter' caps
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20/09/2020 07:03 PM
The tech putting the beef into Australian cattle farming
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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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