Ok, for anyone who has installed yenka and wants to have a closer look at my diagram, here's the file as a download..
Only bugs I can see (so far) are
1/ for some reason, sometimes both chips explode when you load the circuit (prob. the 12v rail powering up...) but I've kinda run out of space on the sheet to draw in a smoothed supply. It works fine if you fix the chips with the spanner icon - they don't blow up twice. Also, Yenka won't let me play with the power lines to the 4017 chips (hidden? they arn't there, and it works without) and the chip type is fixed as a HCS (5 volt cmos) where everything else is 12v.
2/ There isn't an on/off/on switch in the components, so the indicators have separate switches. This means they can be switched on together for "hazard" but get out of phase if you are not quick enough with the switching.
The third (momentary) switch in the middle is the brake pedal. Putting a VR in the 555 circuit should let us adjust sweep rate too (but I couldn't find the potentiometers in yenka)
Have fun!
Only bugs I can see (so far) are
1/ for some reason, sometimes both chips explode when you load the circuit (prob. the 12v rail powering up...) but I've kinda run out of space on the sheet to draw in a smoothed supply. It works fine if you fix the chips with the spanner icon - they don't blow up twice. Also, Yenka won't let me play with the power lines to the 4017 chips (hidden? they arn't there, and it works without) and the chip type is fixed as a HCS (5 volt cmos) where everything else is 12v.
2/ There isn't an on/off/on switch in the components, so the indicators have separate switches. This means they can be switched on together for "hazard" but get out of phase if you are not quick enough with the switching.
The third (momentary) switch in the middle is the brake pedal. Putting a VR in the 555 circuit should let us adjust sweep rate too (but I couldn't find the potentiometers in yenka)
Have fun!