#garfield Logs

Nov 21 2024

03:13 PM polprog: rue_mohr: ok, ill update the project to kicad 8 then
03:54 PM polprog: rue_mohr: updated the project, implemented the errata
03:55 PM polprog: i also ordered 10 PCBs at my local group buy service. i wonder when will they come
09:42 PM rue_mohr: cool, post results eh? I want to see!
09:43 PM rue_mohr: I recommend pre-loading the PLCC pads with solder using a hand iron, then putting the board on a clothes iron with the chip in place, using a heat gun to bump the temp enough to make it 'sit' in the solder, then carefully transporting the board to a cool surface (use needle nose pliers to grab it between the hole and the edge)
09:43 PM rue_mohr: so, PLCC first
09:44 PM rue_mohr: make sure the PLCC is ....
09:44 PM rue_mohr: I should just write a doc and put it in the repo
09:44 PM rue_mohr: who am I kidding, your the only other person in the world who is going to assemble this
09:45 PM rue_mohr: make sure the plcc is soldered down ok, then put the crystal and crystal caps on. solder in the reset button and the pullups under it, do the power LED *, and the 74373 under the ROM
09:46 PM rue_mohr: burn the blink rom, it blinks all of port 1
09:48 PM rue_mohr: put a white or blue (low current) LED on any pin of port 1 (to ground), you do not need a current limiting resistor because all of port 1 is just pullup resistors in the chip. drop the ROM in the pcb holes (no socket) and apply pressure in any direction to make the pins contact, while applying power. The LED should flash, if it does, "all" the connections are ok,
09:48 PM rue_mohr: finish the board, socket last
09:48 PM rue_mohr: (the soics are hard to install nicely with the socket in the way)
09:48 PM rue_mohr: (socket and header last)
09:49 PM rue_mohr: polprog, ^^^ please confirm you got that
09:53 PM Tom_L: i think i used the clothes iron to desolder some stuff once
10:28 PM rue_mohr: yup, my iron is a bit cold, I have to use it for a thermal break and combine it with a heat gun
10:29 PM rue_mohr: you modded an oven, where are your notes on that one
10:29 PM rue_mohr: I tried a few times