Vertical Sync

A project log for Tube Television Tennis

'Pong' made with Vacuum Tubes

256byteram256byteram 08/20/2014 at 14:280 Comments

I scrounged enough working valves (barely) to get vertical sync and positioning working, just while I wait for things to come through the post. The valve count has risen to seven. This is just to prove to myself the idea will work in some way. Getting a decent picture out of the diode logic that connects everything is tricky, as can be seen by the vertical line that follows the paddle. There was much fiddling with resistor values.