This came in from Steve, G1KQH, today. It is often cheaper to buy the completed, built modules from China than to buy the parts in the UK! What is the world coming to?
I bought 5 LM317s on PCB with heatsinks for a fiver:
x-LM317-Adjustable-Voltage- Regulator-Step-down-Power- Supply-Buck-Module-Board-/ 221577652687?pt=UK_BOI_ Electrical_Test_Measurement_ Equipment_ET&hash= item33970ea9cf
Why bother building it any longer, that used to be half the fun! The heatsinks would of cost a Quid each over here, never mind the LM317 and the PCB with connectors..
73 Steve G1KQH