Thanks so much for your reverse engineering diagram of the IR switch from the smart home kit!
I finally can use the IR switch now! I bought this kit in 2014 and could never use it...
I replaced the one capacitor from 680 nF to 330 nF as you explained and it worked 100% OK.
A few years ago I bought a European alternative IR switch, a so called standby kill-switch for TV make ETM. This switch had a standard time delay after switching ON of one minute which stopped me from using it.
Today I found out that the typical USA male and female plugs could easely be removed from the original Littlebits housing.(they are mounted on a circular separable part) and that the ETM version had the same plastic parts, however with European plugs !
I mounted the ETM female and male plug parts into the Littlebits housing. Then I could not close the housing, the plug parts werer too high, appr 5 mm. Then I removed the so called kidsproof protection inside the female plug part, decreasing the height with this 5 mm.
The wiring colors were different.
input AC red
output AC black
common AC white
input AC white
output AC red
common AC black
Then I could close the housing and it worked ! Thanks Frank!