Hi All,
I purchased a small electronics kit for the expressed purpose of learning basic electronics. As fate would have it, the necessity has arisen ahead of the knowledge.
I replaced a home audio processor with a new one that only has a 12v 40mA trigger - vs the previous 250mA. I have a triggered outlet that needs 100mA or greater to turn on an amp and cooling fans.
I see a 2N2222 transistor in my aforementioned kit and played around with building a switch to close the circuit on a 12v 1A source (I was experimenting with a 12v 1A transformer but I planned on replacing with a 300mA model assuming that it would reduce heat) triggered by my 12v 40mA processor trigger but at the very least I'm clueless about the correct resistance values to use on the Base (and collector?).
I tried using a variable resistor on the collector and I could get ZERO volts and ~9v but it appears I could not get full saturation. I've perused the calculations for determining the correct voltage/currents to achieve the desired behavior but I'm fairly certain by the time I figure it out, my new processor will be obsolete! ;-)
I could go the relay route but a digital solution seems so much more elegant, reliable, and I'm sure simple to a knowledgeable person!
Any help would be appreciated.
Craig
I purchased a small electronics kit for the expressed purpose of learning basic electronics. As fate would have it, the necessity has arisen ahead of the knowledge.
I replaced a home audio processor with a new one that only has a 12v 40mA trigger - vs the previous 250mA. I have a triggered outlet that needs 100mA or greater to turn on an amp and cooling fans.
I see a 2N2222 transistor in my aforementioned kit and played around with building a switch to close the circuit on a 12v 1A source (I was experimenting with a 12v 1A transformer but I planned on replacing with a 300mA model assuming that it would reduce heat) triggered by my 12v 40mA processor trigger but at the very least I'm clueless about the correct resistance values to use on the Base (and collector?).
I tried using a variable resistor on the collector and I could get ZERO volts and ~9v but it appears I could not get full saturation. I've perused the calculations for determining the correct voltage/currents to achieve the desired behavior but I'm fairly certain by the time I figure it out, my new processor will be obsolete! ;-)
I could go the relay route but a digital solution seems so much more elegant, reliable, and I'm sure simple to a knowledgeable person!
Any help would be appreciated.
Craig