hello. i have a question about pairing voltage with application.
i have a source of 12V and i need to work with a fuzz face pedal distorsion with germanium transtistors and the the pedal should get 9v.
what is the best solution for this?
i thought about a voltage regulator or a voltage divider + opamp as voltage follower.
the best solution would be the voltage divider but i'm considering a walkaround. any pro/cons?cheers
i have a source of 12V and i need to work with a fuzz face pedal distorsion with germanium transtistors and the the pedal should get 9v.
what is the best solution for this?
i thought about a voltage regulator or a voltage divider + opamp as voltage follower.
the best solution would be the voltage divider but i'm considering a walkaround. any pro/cons?cheers
Attachments
the AC128 ( that i'm supposed to use ) has
Maximum Collector-Base Voltage |Vcb|: 32 V
Maximum Collector-Emitter Voltage |Vce|: 16 V
Maximum Emitter-Base Voltage |Veb|: 10 V
Maximum Collector-Base Voltage |Vcb|: 32 V
Maximum Collector-Emitter Voltage |Vce|: 16 V
Maximum Emitter-Base Voltage |Veb|: 10 V
Should work on 12V ok, but if it bothers you, add four series diodes to the power supply.
A decoupling capacitor wouldn't hurt, either.
A decoupling capacitor wouldn't hurt, either.
If the 12v is at least 12 then a 7809 would be perfect (or 7805 and a 3v3 or 3v9 Zener to create a 9v reg by using the Zener to lift the ground pin of the reg).
If the 12 volts is clean and stable then you could just add a series 3v Zener to the rail to drop some voltage.
If the 12 volts is clean and stable then you could just add a series 3v Zener to the rail to drop some voltage.
the voltage supplied is stable and i planned some 100nf and 47uf capacitors too.
i didn't consider a 3v drop from a zener. i like it more than 4 series diodes even if they should work in a similar way.
so i could use all of the mentioned options.
i see the pro to use a 7809 but should i really go for that instead of the diode solution? (which is better then v.divider+v.follower).
why would you choose one or the other?
i didn't consider a 3v drop from a zener. i like it more than 4 series diodes even if they should work in a similar way.
so i could use all of the mentioned options.
i see the pro to use a 7809 but should i really go for that instead of the diode solution? (which is better then v.divider+v.follower).
why would you choose one or the other?
You could have dropouts from a three terminal regulator if the 12V source is not very stiff.
Or use a low drop out type, such as LM2940. With series diode(s) you are guaranteed
that dropouts will never happen.
Or use a low drop out type, such as LM2940. With series diode(s) you are guaranteed
that dropouts will never happen.
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