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public text v1 · immutableBC547 x2
BC557
3x 1nF
2x 10nF
2.7pF
12pF
1M resistor
4K7
2K2
47K
2x 330R
ULN2803
Relays
Q1 J201 N-channel JFET
R1 3.0M ohm 1/4-watt 5% resistor
R2 2.2K ohm 1/4-watt 5% resistor
R3 6.8K ohm 1/4-watt 5% resistor
R4 51K ohm 1/4-watt 5% resistor
C1 4.7 uF electrolytic capacitor
C2 10 uF electrolytic or tantalum capacitor