S si2030 Member Feb 24, 2012 #1 Hi all, Really simple question here. I was wondering what the combination of two transistors next to the 10k resistor on the left of the diagram was... is it an SCR? Seems that its drawn slightly wrong for an SCR... I am not sure of this though.. Could you also tell me how it works with this component. View attachment 61402 Kind regards Simon Last edited: Feb 24, 2012
Hi all, Really simple question here. I was wondering what the combination of two transistors next to the 10k resistor on the left of the diagram was... is it an SCR? Seems that its drawn slightly wrong for an SCR... I am not sure of this though.. Could you also tell me how it works with this component. View attachment 61402 Kind regards Simon
ronsimpson Well-Known Member Most Helpful Member Feb 24, 2012 #3 It is a Darlington transistor. The two transistors act as one with very high current gain. https://en.wikipedia.org/wiki/Darlington_transistor
It is a Darlington transistor. The two transistors act as one with very high current gain. https://en.wikipedia.org/wiki/Darlington_transistor