2
2. Parts list
2.1
Resistors
R1
1K (colour coding brown-black-red-gold)
– supplied from Si5351A Synth kit
R2
3K (colour coding orange-black-red-gold)
R3, R4, R6 4.7K (colour coding yellow-purple-red-gold)
R5
39K (colour coding orange-white-orange-gold)
R7, R8
560-ohm (colour coding green-blue-brown-gold)
2.2
Capacitors
C1, C3
0.1uF ceramic (body marking “104”) – one supplied from Si5351A Synth kit
C2, C4, C5 22uF electrolytic
Cx
Not required or supplied
– see text
2.3
Semiconductors
LED
3mm red LED
Q1, Q3
2N3904 TO92-package NPN transistor
Q2
2N3906 TO92-package NPN transistor
IC1
ATtiny84 microcontroller, 14-pin DIP package
IC2
LM317LZ voltage regulator, TO92-package
– supplied from Si5351A Synth kit
2.4
Miscellaneous
4-way DIP switch, S1
Push button, S2
Printed circuit board, 1.9 x 1.15 inches (48 x 29mm) size
Socket for IC1
Two 10-pin female header sockets
16-pin male header plug
Note: Certain components listed above are not supplied in the ProgRock kit bag, they are in the Si5351A
Synth module kit bag. This is because the recommended way of assembling the ProgRock kit is to build
the noise filter circuit (Q1-Q3) on the ProgRock PCB, instead of the 3.3V regulator circuit on the Si5351A
Synth PCB. In this case, the LM317LZ from the Si5351A Synth kit is used on the ProgRock PCB as a 5V
regulator. The power supply options are discussed further, below.
