Havis ChargeGuard Auto Shut-off Timer, the latest version of the original automatic shutdown device, is more than an on/off timer for mobile electronics. It's a unique, easy-to-use, intelligent ...
What is the point of reviewing a cheap timer module, especially if it is based on the ubiquitous 555 timer chip? Recently I got an ‘updated’ version of the common 555 timer relay module. This time it ...
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