Light Logic And Much More

August 22, 2022

I finally have a circuit that works best for controlling a Tesla Coil powered Nixie via Light Logic. The use of a relay between the LL gate and the display tube is needed as the relay provides the HARD ground required to switch the Nixie digits. The LL CdS cells just do not like the high rf voltages from the Tesla coil. Two LL gates in parallel are also needed to control the large automotive relay I am using for this experiment.

August 18, 2022

Wow, a long title but it says it all so let's dive right into it. I take a wire and loose couple it near the secondary of the Tesla Coil. That wire feeds high voltage to the anode of the nixie tube. The tube cathodes are switched by the output of the Light Logic sequencer.  There is still a lot of work and investigation to do but this set-up does prove enough to me that it works. The digits in the video flash by quickly so appear blurred but the digits are cycling 0 through 6.

The blurring is also being caused by the CdS cells do not completely stop the path of the HV RF in the circuit so the digits not selected tend to glow a bit. I am already looking into adding a relay in the control circuit.