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- Building a DAC:
- ---------------
- Well...although there are many different ways to build yourself a DAC,
- I'm only going to demonstrate 1 way...the simplest and cheapest way <g>.
-
- Ingredients:
- 1 25 pin male D type plug
- 8 resistors, in ratios of approximately 1:(2:4:8:16:32:64:128), such as
- 5k1Ω, 10kΩ, 20kΩ, 39kΩ, 82kΩ, 160kΩ, 330kΩ, 620kΩ
- a 390Ω resistor
- a 100nf capacitor to smooth the signal out
- some insulated wire to connect it all up
- something to build the circuit on, such as some stripboard
- a socket for the output to connect it to your amplifier
- an amplifier
-
- Instructions:
- 100nf
- ┌─█├───>signal to amp
- │ ┌────>ground to amp
- │ │
- 390Ω▒▒▒
- ┌────┬─────┬─────┬─────┬─────┬─────┬─────┤ │
- 5k1Ω▒ 10Ω▒ 20kΩ▒ 39kΩ▒ 82kΩ▒160kΩ▒320kΩ▒640kΩ▒ │
- ┌┴────┴─────┴─────┴─────┴─────┴─────┴─────┴─┴┐D plug
- └┬────┬─────┬─────┬─────┬─────┬─────┬─────┬─┬┘
- pin number 2 3 4 5 6 7 8 9 25
-
- Build the circuit, as shown above, and connect it to your amplifier
- (maybe active walkman-style speakers, or a stereo system), plug it into
- your parallel port and tell DOMINATION that you have a Mono/1 DAC on
- whatever parallel port you plugged it into. You can build two of these,
- and then tell DOMINATION that you have a Stereo/2 DAC if you want stereo
- explosions <g>. More ways to build better DAC's are available in the
- file 'hardware.doc' that comes with Mark J Cox's MODPLAY program,
- and his Stereo-on-1 and DAC's that use a ZN426E chip sound better,
- but are harder to build. When you have built and tested this DAC you
- should put it in a case to prevent it from short-circuiting, and possibly
- damaging your computer.