It's hard to make a big sensation from something that does a seemingly simple thing, but I have to say I'm really happy with it - it does what it does and does it well! 

However, that does mean you have to give it a great big "think" to improve it. I've had suggestions like changing the resistor values to improve the bias level of the LM393, since the range of the comparator actually isn't GND to VCC like you'd expect but only GND to VCC-1.5V. Luckily that didn't even involve changing the PCB. 

Hopefully I can at improve it a bit more without adding to the cost - it really is supposed to be as cheap as possible. 

But speaking of PCB - I haven't even ordered it yet, since I'm hoping to order it together with my new #ABN6502 SBC R1 PCB's(they need a few of the actual R1 features moved to the PCB instead of floating in free air :)) 

For now I've moved it to a tiny little breadboard and featured it in my new video about running BASIC - the Simply Universal Modem play's a big part as I couldn't save and load without it. And it actually worked perfectly the first time!

Check it out! :D