Basic Voltage-Controlled Amplifier

I’ve been looking at the theoretical principles that govern the voltage-controlled amplifier (VCA) recently and came across some simple VCA designs that caught…

Differential Amplifier w/ Cathode Follower

This is a circuit designed for a classroom project whereby the instructions were to “improve” a differential amplifier circuit. The differential amplifier design…

mellotronium 2.0: rebuild

after our move to Oregon two months ago, i’m finally getting back to a spot where i can do more building and experimentation.…

MOSFET vs. BJT

a good rule of thumb pulled from this forum thread (http://www.electro-tech-online.com/general-electronics-chat/39339-mosfet-vs-bjt.html): Need a switch to be fully-on fully-off and carry lots of current…

PT2399 with BJT preamp

here’s a short clip of the delay circuit that i intend to convert to a stomp box. i’m still working out the kinks…