I always use a stall because urinals are gross.. they need to start putting this in their stalls too!

I swear no more tinkering or adding features.. I haven't even got the rev 2 boards from JLC yet!

This will almost certainly be the release version though. Now it can measure the current being used and the i2c header is there to connect a small OLED display

Finally got the HUSB238 to work... turns out they die if connected to a live USB-C port but the power pin isnt powered!

Now to program that STM8 to do all the useful stuff. I SO wish i'd broken out the serial TX/RX on the bloody thing

Do we know who was responsible for this ? :D

and the voltage at SIG looks like this

Here it is. The 5V voltage source and Rp represent inside the computer. The line labelled SIG would come from the fire button.

Basically R3/C1 form the timing circuit... when C1 is charged enough, Q1 conducts making Q2 conduct until C1 discharges. Q2 effectively completes the circuit to ground.

Here's how I did it on an Issue Two. I used UF4004 instead of BA158 because they were easier to get at the time. As long as they are "fast" or "ultrafast" rectifier diodes they will work fine

Thats enough PCBing for today I think. Now to get one made and see if I can get some code running on it.

I took pictures of how crappy mine is !
The circular pcb is the lamp ballast - when I first got it, it had the remnants of the old wires on it! I cleaned it up and hot glued it in place

Im thinking about rebuilding the whole thing in a project box

Some pictures I took at the time

This must be their ancestors

hm, probably not enough IO's on that arduino pro mini board, but you can use a shift register such as a 74HC595 to drive the segments. This is what I did in my bench PSU. There are two shift registers because it has two 4-digit displays.

Looks like theyre not fully complying though - here in the UK we see this

could be worse!

For transparency, here's my first ever recap job - done with nothing but an Antex CS iron on my own machine. I couldn't find a 22uF SMD cap in my collection so I did this as a TEMPORARY measure :)

Yes.... i think i'll like it here...

(if anyone gets this text we can be friends :) )