Abstract: The Token Sensing Photodetector Actuated Electronic Control and Timing Device (TSPAECTD) is a self contained unit which can control the activation and time of operation of any electrical appliance, device, machine or process to which it is connected. This control is effected by means of detecting the authenticity of a colored translucent object (token) inserted into the apparatus housing. The apparatus is electronically adjusted to detect only an object or token having a particular combination of size, shape, color, hue, reflectivity and light absorbancy. The TSPAECTD includes an improved photodetector circuit containing at least two monochromatic light sources and corresponding photodetectors aligned as pairs. Each pair is connected to a comparator integrated circuit containing four comparator subcircuits.