Hi BKKCoins
Klondike k16 board design is ready(i want order few PCBs)? Which design is more preferable (qfn or not?)?
And about k1 (v 0.1) You said that it is better to replace 74AUP1G02GW with a 74AUP2G02, but in last update of BOM for K1 at github NOR Gate is 74AUP1G02GW. Which is better to install?
Thank You!
QFN and SS both perform the same. It depends which one you can get. The SS ran out a while ago and there was QFN until just a day or two ago. It could be a while before they are easy to find again.
I haven't updated the K1 files yet. The new board revision will use the 2G02 but it's not pin compatible so you can't place that on the old board.
Here's a brief list of changes I'm doing for the K1:
- replace NOR gate with DUAL NOR gate
- add Schmitt inverter package
- chg PIC to QFN
- add thermistor for temperature sensing
- add 2 holes for mounting a heat sink
- Make both LEDs flashable (tied to PIC pins)
- make I2C non-thru hole SMD header type pads
- use 2mm board thickness for USB compatibility
- specify an alternate reg and inductor allowing 3A power (not for USB 2.0 ports)
I think i can fix klondike v0.1 (NOR Gate issue) using little add-on pcb. Place on it 100 Ohm resistor, footprint for 2G02, and conect it all, like in k16 schematic?. What about Schmitt inverter package? it is need? Maybe also place it on add-on pcb?