5V to 12V STEP UP INVERTERGBP £2.6091 In Stock[0223]https://www.exxosforum.co.uk/atari/store2/#0223
Designed to fit H4 & H5 series motherboards to provide approximately 12V when only using a 5V only power supply. It is designed to plug into the auxiliary floppy power connector and can deliver up to 250mA. Available until stock is exhausted.