Sellers at Tesco are third party sellers we have invited to sell on Tesco direct. These are companies we’ve selected to provide you with a wider range of products to choose from in one place. They are a mixture of well-known high street retailers and specialist retailers who operate online. Plus, you earn Clubcard points on all seller orders.
Seller deliveries & returns
Delivery times and costs vary by seller - further details are shown on the product pages and at checkout.
If Click & Collect is available from a seller, it will also show on the product page and at checkout.
The delivery and return of seller items is managed by each seller. For further details, or if you have a question about the delivery or return of a seller product, please use the Seller directory to find the seller’s ‘help’ page.
The PCB should be exposed using our UV exposure box and a circuit overlay transparency. Exposure time will be from 8 to 15 minutes. Mix together 0.5 litres approximately with one teaspoonful of sodium hydroxide (available from most chemists) and pour into a tray (CH38R). Gently rock the exposed PCB in the tray until the unwanted photo resist is dissolved away. Etch the board in a bath of ferric chloride and after rinsing, expose the PCB in the UV box for a further 10 minutes. Wash off all the remaining etch resist in a tray of sodium hydroxide solution. Sizes available: