DC 6-24 Vin to 5V 3A USB output Buck Step Down Converter module rpi zero 1 * DIY Digital Clock

1 * DIY Digital Clock Kit

normally closed (NC) and the common terminal (COM) is disconnected after 0-24 seconds (this time can be adjusted according to your needs) relay is switched off after the bell

as for Arduino UNO or any microcontroller with a serial port module

and DC output dual output

timers and alarms

DC 6-24 Vin to 5V 3A USB output Buck Step Down Converter module rpi zero 1 * DIY Digital ClockThis mini DC DC step down voltage converter module support 6 24V voltage input and 5V 3A output with input polarity reverse protection and output over voltage protection, short circuit protection. It adopts synchronous rectification technology to ensure ultra high power conversion up to 97. 5% to take full use of your input power. It is ideal for providing a regulated 5V USB output to charge your iPhone, Android phone, tablet, or any other USB powered