I haven't done it but I only hear good reports on this forum. It's actually a SM74611 smart diode from Texas Instruments. You can buy them online or go to themagnetoguys.co.uk who supply one on a pcb with wires attached.
To be clear, it is a smart diode that detects voltage difference and switches on a FET dropping very little forward voltage. Many people use a normal diode which will drop 0.5-0.6 volts between the dynamo and the other side. This is acceptable but will dissipate more power and therefore need to be heat sinked, you may as well use the smart diode.
To be clear, it is a smart diode that detects voltage difference and switches on a FET dropping very little forward voltage. Many people use a normal diode which will drop 0.5-0.6 volts between the dynamo and the other side. This is acceptable but will dissipate more power and therefore need to be heat sinked, you may as well use the smart diode.