Building a high quality photogate

Ladino, Luis Alejandro | 2019

In this paper we present a method to construct a simple, sturdy and inexpensive photogate to be used in elementary physics laboratories. The great advantage of the proposed design is that it has no transmitter-receiver alignment related problem at all and the receiver is nicely encapsulated which prevents any spurious light triggering the photogate electrical circuit. The design can be easily modified to build larger photogates than those currently on the market.