December 2022

Steve showed a desktop power supply which uses a desk lamp as the power source.

The desk lamp uses two telescopic arms to hold the halogen lamp unit and the lamp distance and angle are adjustable.

Power for the lamp runs up the telescopic arms which are exposed metal, so 12VAC is readily hackable by attaching alligator clips to the metal!

The 12VAC is rectified and the DC is fed into a variable DC buck regulator module.  A 3 digit voltmeter module shows the output voltage.

This can also be connected into a variable regulator module with screen for further voltage settings and also displays the current.

Handy for prototyping circuits on the desk top.

Alex showed us a robot restaurant where the food is delivered to the table by mobile robot devices.  Strangely ordering is done manually 

Alex also did a small screen comparison - Nokia 5110 vs TFT vs OLED .96".

David showed us a joule thief circuit he built for primary schools and also a recovered Cree LED running direct from lion battery 

Wayne talked about picomsc,   The Pi pico running mm basic.