If the application doesn’t demand a wide control range and low hysteresis, a simple variable light control may be designed using quadrac devices, such as the Littelfuse Q6008LTH1LED or Q6012LTH1LED ...

The Alternistor QUADRAC series is claimed to be an ideal, lower-cost alternative to the option of buying discrete diacs to assemble in conjunction with gated triacs. The device ...

Pre-regulators at the input of power supplies minimize losses. This version uses optical feedback from an LED and light-dependent resistor instead of the more common optically ...