Enable lines- agree, I mostly did that because routing was easier that way. I'll look at it.
Current limit-agree, I'll put it on the list
Enable line- not sure. isn't it safer to require +5V to turn the relay on? That way even with no firmware, or bad 7805 or some other fault, you don't get the relay on unless 5V is good and atmega is running.
diodes - I've seen a few comments from other designers that they are not required. They are not shown in the reference schematic on the datasheet. I'm not opposed to including them, I'm just not sure I could fit it into the space available. Perhaps some SMD ones on the back?
teminals-agreed, the green ones are from mouser. I bought them first, and got the better ones later. I mostly used them to differentiate the high current connectors from the low current ones. That won't be necessary with a better silkscreen, and I'll just use the bigger ones.
Current limit-agree, I'll put it on the list
Enable line- not sure. isn't it safer to require +5V to turn the relay on? That way even with no firmware, or bad 7805 or some other fault, you don't get the relay on unless 5V is good and atmega is running.
diodes - I've seen a few comments from other designers that they are not required. They are not shown in the reference schematic on the datasheet. I'm not opposed to including them, I'm just not sure I could fit it into the space available. Perhaps some SMD ones on the back?
teminals-agreed, the green ones are from mouser. I bought them first, and got the better ones later. I mostly used them to differentiate the high current connectors from the low current ones. That won't be necessary with a better silkscreen, and I'll just use the bigger ones.