Electronics > Projects, Designs, and Technical Stuff
Home Brew Analog Computer System
megajocke:
Cool project! O0 :-+
GK:
Oh no, another audio forum refugee :) How's it going?
GK:
The last batch of 0.1% resistors arrived today and this evening I was finally able to finish loading the prototype Sine/Cosine module PCB and test it out. It worked just as planned. I haven't calibrated it with a voltmeter or linearity tester yet; just tweaked it while viewing the waveforms on the oscilloscope.
Here are some pics of it operating with the 0-100V unipolar triangle wave from the calibration/test oscillator used as an input signal.
To recap, the Sine/Cosine module accepts a positive input signal ranging 0V to 100V representing phase angle, which is scaled to 3.6 degrees per volt, so 100V=360 degrees or two pi radians. The output has a scaling factor of 100, so sin(90) and cos(0) = 100V and sin(270) and cos(180) = -100V. In the cosine mode the module generates a continuous sinewave output from the 100V triangle wave test signal.
Now I have another 8 of the Sine/Cosine boards to complete. I’m keeping a tally of the computers total component count. The PCB’s for the finished Sine/Cosine function chassis alone will contain a grand total of:
2252 resistors.
808 diodes
805 transistors
349 capacitors
51 trimpots
29 voltage reference ICs
27 single op-amps
18 quad op-amps
10 inductors
9 dual comparators
9 555 timers
9 reed relays
9 trimmer capacitors
4 CMOS digital ICs
2 regulator ICs
2 DPDT relays
2 diode bridges
1 quad comparator
1 crystal
robrenz:
Awesome work there GK :-+ Makes me feel electronically inept :'(
GK:
Yeah I'm pretty awesome.
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