التروكترون والديكاترون - صمام العرض الرقمي - العد الالكتروني .. الإلكترونيات

Troctron and Decatron - Digital Display Valve -
Electronic Counting .. Electronics

Troctron and Decatron

The Troctron contains a central cathode, ten grids, and ten anodes or targets, in addition to ten other paths (20). In this device, grids 1, 3, 5, 7, 9 are connected to a specific circuit, and grids 2, 4, 6, 8 and zero are connected to another circuit. If we assume that the electron beam is at zero, and if the input pulse causes this beam to be cut off, the first grid moves the beam to the target, then the next pulse moves the electron beam a second step until it reaches the final position, which sends it to the tens valve. It is worth noting that the Troctron can count up to 1,000,000 per second. The decatron contains ten cathodes, and ionization in it causes the discharge path to glow (207).

206 - The ten-position trochotron.
207 - The decatron counter.

In it, the individual pins S are connected to each other and fed with the pulses to be counted. These pulses reach the group of pins P through a delay circuit. When a certain pulse is generated near pin 7, the discharge path deviates clockwise and its displacement increases when the delay pulse reaches the adjacent pin P. In the event of a pulse interruption, the discharge path moves to pin 8. The process can be repeated many times as needed.

Digital display valve

Figure (208) shows a valve containing several paths in the form of numbers from zero to 9 arranged together and overlapping within a single common anode. The other ends of the numbers are connected to this valve, to separate pins, and in this valve the discharge process causes the number corresponding to the voltage that causes the discharge to glow.

208 - Numbers start valve.