Maker Factory ELECTRONICS EXPERIMENTS BOX Manual page 178

Circuit 155: LF phase shifter 90°
Setup information
Install the transistor, the six resistors and the three electrolytic capacitors as shown in Fig. 2.155. The nine
jumper wires come next. Check the placement on the board again and only then connect the battery.
Experiment
Our circuit here will delay the passage of LF signals causing a phase shift of about 90°. When this signal is
mixed with the original signal, we have got the well-known Phaser Effect.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.155.
180
Components required:
1 x 2N3904 transistor,
1 x 100 Ω resistor,
2 x 2.2 kΩ resistors,
1 x 22 kΩ resistor,
2 x 100 kΩ resistors,
1 x 1 μF electrolytic
capacitor, 2 x 10 μF
electrolytic capacitors,
1 x breadboard, 1 x 9V
battery with clip con-
nector.
Fig. 2.155: LF phase shifter
90 degrees