2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86841We present a simple and low-cost implementation of a fast electronic coincidence detector based on PECL logic with a TTL-compatible interface. The detector has negligible dead time and the coincidence window is adjustable with a minimum width of 1 ns. Coincidence measurements of two independent sources of Bose-Einstein distributed photocounts are presented using different coincidence window widths.4 pages, 6 figuresInstrumentation and DetectorsOpticstext