I have put together a circuit to take mains 230vac down to 5vdc for use in phone chargers, USB hubs etc.
I plan to replace the LT1085-12 and LT1084-5 with cheaper versions, such as BA17805T etc. I'm using the 12vdc regulator to smooth the current before using the second regulator to reduce to 5vdc. However, is the second one necessary (ltspice shows a fairly wavy voltage output without the second one)?
I'm fairly new to electronics, so may have missed something.
I plan to replace the LT1085-12 and LT1084-5 with cheaper versions, such as BA17805T etc. I'm using the 12vdc regulator to smooth the current before using the second regulator to reduce to 5vdc. However, is the second one necessary (ltspice shows a fairly wavy voltage output without the second one)?
I'm fairly new to electronics, so may have missed something.