January 2015

Tiny Tim Stereo Amplifier (Part 1); PortaPAL-D (Part 2); SiDRADIO - more modes; Raspberry Pi B+ review; Fritzing software review; Circuit Surgery - triacs. More details...

 

April 2015

Rubidium Frequency Standard; 10A 230V Universal Motor Speed Controller (Part 2); USB-RS232C Interface; Teach-In 2015 (Part 3); PIC n MIX larger LPLC display. More details...

 

July 2015

L-O-O-O-N-G Gating Times for the 12-digit High Res. Counter; Threshold Voltage Switch; Touch-Screen Digital Audio Recorder (Part 2); PIC n MIX oscilloscope; More details...

 

October 2015

Digital FX Processor for Guitars & Musical Instruments; Opto-Theremin (Part 2); Courtesy LED Lights Delay for cars; PIC n MIX LPLC oscilloscope; More details...

February 2015

Teach-In 2015 (Part 1); Tiny Tim Stereo Amplifier (Part 2); PortaPAL-D (Part 3); Audio Delay for PA Systems; PIC n MIX - adding PWM; Circuit Surgery - stopper resistors; More details...

 

May 2015

Low-Cost Precision 10V Reference; Deluxe Fan Speed Controller for shaded pole motors; RGB LED strip controller; Teach-In 2015 (Part 4) : Noise & Distortion. More details...

 

August 2015

Nirvana Valve Sound Simulator; Resistor-Capacitor Decade Substitution Box; TempMaster Thermostat Mk3; Teach-In 2015 (Part 7) Heatsinks, power. More details...

 

November 2015

Currawong Valve (Tube) Amplifier (Pt. 1); 48V Dual Phantom Power Supply; Programmable Mains Remote Timer; Teach-In 2015 (Pt 10): power supplies. More details...

March 2015

10A 230V Speed Controller (Part 1); Stereo Echo & Reverb Unit; Teach-In 2015 (Part 2); Tiny Tim Stereo Amplifier (Part 3); Audio Out; Circuit Surgery - constant current sources; More details...

 

June 2015

Touch-Screen Digital Audio Recorder (Part 1); Burp-Charger for batteries; 50 Years of the 2N3055; Teach-In 2015 (Part 5): Filters and tone controls; PIC n MIX Faster LCDs; Audio Out More details...

 

September 2015

Opto-Theremin (Part 1); Wideband, Active Differential 'scope Probe; Mini 10W Class-D Audio Amplifier; Audio Out; Teach-In 2015: Power amplifier design. More details...

 

December 2015

High-energy Multi Spark CDI for performance cars; Time-Domain Reflectometry Dongle for 'scopes; Currawong Valve (Tube) Amplifier (Part 2) More details...