Computer Headset Adapter Project Parts List
RadioShack order numbers where available
Quan Description Radio Shack #
2 1458 Dual section op-amps 276-038
2 8 pin PCB DIP sockets 276-1995
1 Printed circuit project board 276-159
4 Standoffs 276-195 (set 4)
1 Project metal box enclosure 270-238
1 DPDT (on-on) miniature toggle switch 275-636
1 12 DC around 100 ma wall wart power supply 273-1773
2 3 wire (stereo) 1/8 inch jacks 274-0249 (set of 2)
1 Coax type chassis mount DC connector 274-1583
2 Matching plug for above – one for wallwart and one for 9 volt battery 274-1573 (set of 2)
1 XLR-3 male chassis count connector *
1 ¼ inch mono chassis mount jack with normal through switch 274-255
2 0.005 uf ceramic capacitors 272-130
2 0.01 uf ceramic capacitors 272-131
1 0.1 uf metal (for audio) 272-1053
3 220 uf 25 volt electrolytic 272-1029 or 272-1017
1 100 uf 10 volt electrolytic 272-1028 or 272-1016
1 7805 5 volt DC three pin regulator 276-1770
1 Murata DC to DC converter two voltage output (5 volts in ± 12 volts out) model NKA0512SC *
1 100 to 1000 ohm miniature variable audio taper potentiometer with on/off switch *
1 Suitable knob for above pot *
Resistors (1/2 watt unless noted) – RadioShack numbers are sets of five
2 68 ohm 271-1106
4 4.7 K 271-1124
6 1 K (shown as 470 ohm in schematic but 1 Ks are actually better) 271-1118
1 100 ohm 271-1108
2 33 K 271-1104
1 10 K 271-1126
2 56 K *
(an odd value you can get close enough to 56k by series a 22k (RS 271-1128) and a 33k (RS 271-1129))
(*) Builder may have to sample other sources (Digikey, Mouser etc.) for those parts.
Also: Miscellaneous construction components such as solder lugs, hook-up wire, bus wire, label material, etc.
Schematic
Click on image below for enlarged view
(Click for enlarged view)
