| ??? 02/25/03 19:17 Read: times |
#40071 - RE: Connecting an LED to an 8052 Responding to: ???'s previous message |
This gets round several objections
1.) The load is off at reset. 2.) The supply to the load can be as high as practical (with a flywheel diode this works with relays too)That means it can feed several LEDs in series. 3.) The first transistor can be driven from +5 and the second from +12, and provides a little more isolation to the CPU. Steve |



