For Hobbyists & Makers · BJT Amplifier
BJT Amplifier for a PCB trace
Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a PCB trace live below — adjust the inputs and watch it respond, right in your browser.
BJT Common-Emitter AmplifierLive
bias point & gain
Controls
Presets
A transistor amplifies because a tiny base current controls a much larger collector current (Ic = β·Ib). The Q-point on the DC load line sets how much undistorted swing you get; too far and the transistor saturates or cuts off. Educational tool.
Data Inspector
Collector current3.00 mA
V_CE (bias)3.99 V
Voltage gain-4.7 ×
Regionactive ✓
Governing equation
Reading this result: Sitting in the active region with about 4.0 V of V_CE headroom; the gain ≈ -Rc/Re ≈ -4.7×, so shrinking Re trades bias stability for more voltage gain.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
More with BJT Amplifier
Frequently asked questions
- Is this good for hobbyists & makers?
- Yes — this version of "BJT Amplifier for a PCB trace" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.