Username EF82
Member Since June 15, 2020

EF82's Public Circuits:

Now showing circuits 21-40 of 57. Sort by

Colpitts 6Mhz

Colpitts 6Mhz PUBLIC

Trying to match a CL schematic with a real circuit build.

by EF82 | updated December 21, 2020

Booster 1v5 to 5v

Booster 1v5 to 5v PUBLIC

A regulated 5v, 15mA supply from a 1v5 cell.

by EF82 | updated December 21, 2020

Optocoupler half-duplex

Optocoupler half-duplex PUBLIC

Using 2 LEDs to make an optocoupler. High brightness red LEDs have useful photoelectric responses which enable bi-directional half-duplex operation.

by EF82 | updated December 21, 2020

Curve Tracer p-channel MOSFET

Curve Tracer p-channel MOSFET PUBLIC

by EF82 | updated December 21, 2020

FET stage gain

FET stage gain PUBLIC

How does voltage gain vary with gate bias?

by EF82 | updated December 21, 2020

FET phase-shift oscillator

FET phase-shift oscillator PUBLIC

A first attempt at putting FET gain control in an RC phase shift oscillator.

by EF82 | updated December 21, 2020

Curve Tracer N-channel JFET

Curve Tracer N-channel JFET PUBLIC

by EF82 | updated December 21, 2020

Amplitude modulator

Amplitude modulator PUBLIC

by EF82 | updated December 21, 2020

Colpitts 8MHz Xtal

Colpitts 8MHz Xtal PUBLIC

by EF82 | updated December 21, 2020

8MHz LC oscillator

8MHz LC oscillator PUBLIC

by EF82 | updated December 21, 2020

Curve Tracer NPN BJT

Curve Tracer NPN BJT PUBLIC

by EF82 | updated December 21, 2020

Night Light Controller

Night Light Controller PUBLIC

A small light for night time illumination. A pulsed LED makes efficient use of the battery. Re-charging is via solar panel or USB.

by EF82 | updated November 17, 2020

JFET biassing

JFET biassing PUBLIC

by EF82 | updated November 07, 2020

Feedback loop step change

Feedback loop step change PUBLIC

by EF82 | updated October 26, 2020

I vs V graphing

I vs V graphing PUBLIC

by EF82 | updated October 20, 2020

Diode based AC voltage divider

Diode based AC voltage divider PUBLIC

Makes use of the small-signal AC impedance of a diode to create a variable AC voltage divider. Information for Q&A forum...

by EF82 | updated October 16, 2020

Prototype model for "Germanium" BJT

Prototype model for "Germanium" BJT PUBLIC

First attempt at simulating a Ge PNP transistor. Mainly concentrating on the low voltage Vbe junction.

by EF82 | updated September 07, 2020

DC/DC booster 430mV to 2.5V

DC/DC booster 430mV to 2.5V PUBLIC

Boosts a 430mV supply to drive 2 red LEDs in series, using a blocking oscillator. Uses a prototype sim of a small-signal "Germanium" BJT.

by EF82 | updated September 07, 2020

Miller effect with 2N3904

Miller effect with 2N3904 PUBLIC

Looking at the Miller effect in the context of bandwidth, using two configurations of BJT amplifier.

by EF82 | updated September 07, 2020

Average power by integration

Average power by integration PUBLIC

Integrating over SINE cycles to find average power and RMS.

by EF82 | updated September 04, 2020