transistor switch

Jenalee K. · 2006-04-24T13:22:13+00:00

To improve my design skills I like to look at the schematics ofcommercial stuff. In those designs I often see transistor switchesconnected as below.. VCC. +. |. .-.. | | RL. | |. '-'. R1 |. ___ |/. Vi--|___|---o----|. | |>. .-. |. | |R2 |. | | |. '-' |. | |. '------o. |. ===. GND. (created by AACircuit v1.28.6 beta 04/19/05 I usually only use R1, why would I need R2?I calculate my R1 this way: R1 = (Vi-Vbe)/(0.1*iLoad)How would R2 affect this?Thanks,Jenalee K.

Apr 24, 2006 20 Replies

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Fred Bloggs 20 years ago

So can silicon power running hot.

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