nº911

Bar with 3 mini incandescent bulbs, supply USB 5V

nº903

Simple astable multivibrator for RGB led, supply 2xLR03.

nº910

Slot machine with 2 RGB leds. Jackpot self-flashing RGB led is activated whenever color combination is either Red-Red, Green-Green or Blue-Blue, supply 3V

nº909

Blinking pair of incandescent light bulbs with 1 MOSFET, supply USB 5V.

nº908

Roulette with RGB led, supply 3V

nº907

Loop with 10 leds with variable timing controlled by self-flashing RGB led, supply 3V

nº906

MW radio receiver with 2 transistors, USB +5V supply voltage

nº905

Portable AM reflex radio receiver; only ferrite antenna; no ground connection; 2 bipolar transistors; loudspeaker output; supply 3V

nº904

Inductance meter 47uH-10mH for oscilloscope by impedance halving method, supply 3V

nº902

"Knight Rider" led effect with 1 bipolar transistor, supply 12V.

nº901

Simple analog multiplying circuit: PROD=M1xM2 with M1,M2 between 0,00 and 1,00; supply 9V.

nº900

Timing for the simple transistor astable multivibrator running in 2 possible modes.

nº899

Simple flashing controller for Christmas lights, supply 230Vac/50Hz.

nº898

Experimental TRF audion MW radio receiver: 1 transistor; loudspeaker output; about 10m wire antenna(and ferrite antenna) and PE connection. Receives during daylight MW Antena 1 with 630KHz carrier at about 30Km distance from transmitter; supply 24V.

nº897

Self-quenching oscillator with 1BJT, supply 2xNiMH.

nº896

Minimalist alarm siren: 1 resistor + 1 BJT + 1 blue led + 2 capacitors + 1 loudspeaker, supply 9V

nº895

Minimalist multivibrator for dual(red/green) led : 2 transistors + 1 trimmer potentiometer + 1 capacitor, supply 2xNiMH.

nº894

Simple voice changer with 4 transistors, supply 2xNiMH.

nº893

Sound effect "deep breathing" with 4 transistors, supply 9V.

nº892

Yellow led driven by 1 bipolar transistor operates in 2 modes: irregular flickering or always on; supply 2xNiMH.