Root/cntr/cntr.sch

Source at commit 81ab679fbd94c263068019ce9084cc7bfb4b9518 created 9 years 1 month ago.
By Werner Almesberger, The parasitic capacitance of the three probe input pins and R1 formed a quite formidable low-pass filter that almost completely eliminated the 1 MHz signal.
1EESchema Schematic File Version 2 date Wed Aug 25 06:34:07 2010
2LIBS:power
3LIBS:device
4LIBS:conn
5LIBS:c8051f320
6LIBS:mini_usb_b
7LIBS:cntr-cache
8EELAYER 24 0
9EELAYER END
10$Descr A4 11700 8267
11Sheet 1 1
12Title ""
13Date "25 aug 2010"
14Rev ""
15Comp ""
16Comment1 ""
17Comment2 ""
18Comment3 ""
19Comment4 ""
20$EndDescr
21Wire Wire Line
22    8850 4000 8850 3800
23Wire Wire Line
24    8850 3800 8650 3800
25Connection ~ 9450 1650
26Wire Wire Line
27    9450 1650 9450 1850
28Wire Wire Line
29    3700 3050 3950 3050
30Wire Wire Line
31    5850 3200 5000 3200
32Wire Wire Line
33    9100 5700 9100 5900
34Wire Wire Line
35    9200 4200 9200 4400
36Wire Wire Line
37    9200 3100 9200 2900
38Wire Wire Line
39    9200 2900 8650 2900
40Wire Wire Line
41    9100 1850 9100 1650
42Connection ~ 7800 1650
43Wire Wire Line
44    7800 1650 7800 1850
45Wire Wire Line
46    7650 1850 7650 1650
47Wire Wire Line
48    7500 1850 7500 1650
49Connection ~ 4950 3650
50Wire Wire Line
51    4950 4200 4950 3650
52Connection ~ 3950 3650
53Wire Wire Line
54    5850 3050 5650 3050
55Wire Wire Line
56    5300 6200 5300 5550
57Wire Wire Line
58    5300 5550 5500 5550
59Wire Wire Line
60    5500 5550 5500 6200
61Wire Wire Line
62    6750 6200 6750 4650
63Wire Wire Line
64    3950 4700 3950 4900
65Wire Wire Line
66    3350 4700 3350 4900
67Connection ~ 3650 3200
68Wire Wire Line
69    3650 4200 3650 3200
70Wire Wire Line
71    4550 4600 4550 4800
72Wire Wire Line
73    5850 3500 4550 3500
74Wire Wire Line
75    2500 3500 2700 3500
76Connection ~ 1150 3200
77Wire Wire Line
78    1350 3200 1150 3200
79Wire Wire Line
80    1150 3650 1350 3650
81Wire Wire Line
82    1350 3050 1150 3050
83Wire Wire Line
84    1150 3500 1350 3500
85Connection ~ 1150 3500
86Wire Wire Line
87    1150 3050 1150 3850
88Connection ~ 1150 3650
89Wire Wire Line
90    2500 3650 2700 3650
91Wire Wire Line
92    2700 3650 2700 3850
93Wire Wire Line
94    2500 3200 4150 3200
95Wire Wire Line
96    4950 4600 4950 4800
97Wire Wire Line
98    3350 4200 3350 3350
99Connection ~ 3350 3350
100Wire Wire Line
101    3650 4700 3650 4900
102Wire Wire Line
103    6900 4650 6900 6200
104Wire Wire Line
105    5850 3350 4300 3350
106Wire Wire Line
107    4300 3350 4150 3200
108Wire Wire Line
109    2500 3350 4150 3350
110Wire Wire Line
111    4150 3350 4300 3200
112Wire Wire Line
113    3950 3050 3950 4200
114Wire Wire Line
115    4550 3500 4550 4200
116Wire Wire Line
117    5850 3800 5650 3800
118Connection ~ 5650 3650
119Wire Wire Line
120    5650 3650 5650 6200
121Connection ~ 5650 3800
122Wire Wire Line
123    7500 1650 8400 1650
124Connection ~ 7650 1650
125Wire Wire Line
126    9100 2350 9100 2750
127Wire Wire Line
128    9100 2750 8650 2750
129Wire Wire Line
130    8900 1650 10250 1650
131Connection ~ 9100 1650
132Wire Wire Line
133    9200 3600 9200 3800
134Wire Wire Line
135    10050 2050 10050 1850
136Wire Wire Line
137    10050 1850 10250 1850
138Wire Wire Line
139    4300 3200 4500 3200
140Wire Wire Line
141    2500 3050 3200 3050
142Wire Wire Line
143    3950 3650 5850 3650
144Wire Wire Line
145    9450 2550 9450 2350
146$Comp
147L GND #PWR01
148U 1 1 4C71BB6C
149P 8850 4000
150F 0 "#PWR01" H 8850 4000 30 0001 C CNN
151F 1 "GND" H 8850 3930 30 0001 C CNN
152    1 8850 4000
153    1 0 0 -1
154$EndComp
155$Comp
156L GND #PWR02
157U 1 1 4C71BAB2
158P 9450 2550
159F 0 "#PWR02" H 9450 2550 30 0001 C CNN
160F 1 "GND" H 9450 2480 30 0001 C CNN
161    1 9450 2550
162    1 0 0 -1
163$EndComp
164$Comp
165L VR VR4
166U 1 1 4C71BA9B
167P 9450 2100
168F 0 "VR4" V 9530 2100 50 0000 C CNN
169F 1 "5V6" V 9450 2100 50 0000 C CNN
170F 2 "0603" H 9450 2100 60 0001 C CNN
171    1 9450 2100
172    -1 0 0 -1
173$EndComp
174$Comp
175L R R4
176U 1 1 4C71B3DC
177P 4750 3200
178F 0 "R4" V 4830 3200 50 0000 C CNN
179F 1 "0" V 4750 3200 50 0000 C CNN
180F 2 "0603" H 4750 3200 60 0001 C CNN
181    1 4750 3200
182    0 1 -1 0
183$EndComp
184$Comp
185L R R5
186U 1 1 4C71B3D9
187P 3450 3050
188F 0 "R5" V 3530 3050 50 0000 C CNN
189F 1 "0" V 3450 3050 50 0000 C CNN
190F 2 "0603" H 3450 3050 60 0001 C CNN
191    1 3450 3050
192    0 1 -1 0
193$EndComp
194$Comp
195L GND #PWR03
196U 1 1 4C71B2DD
197P 9100 5900
198F 0 "#PWR03" H 9100 5900 30 0001 C CNN
199F 1 "GND" H 9100 5830 30 0001 C CNN
200    1 9100 5900
201    1 0 0 -1
202$EndComp
203$Comp
204L PWR_FLAG #FLG04
205U 1 1 4C71B2DB
206P 9100 5700
207F 0 "#FLG04" H 9100 5970 30 0001 C CNN
208F 1 "PWR_FLAG" H 9100 5930 30 0000 C CNN
209    1 9100 5700
210    1 0 0 -1
211$EndComp
212Text Label 9750 1650 0 60 ~ 0
213PROBE
214$Comp
215L GND #PWR05
216U 1 1 4C71B1E2
217P 10050 2050
218F 0 "#PWR05" H 10050 2050 30 0001 C CNN
219F 1 "GND" H 10050 1980 30 0001 C CNN
220    1 10050 2050
221    1 0 0 -1
222$EndComp
223NoConn ~ 7050 4650
224NoConn ~ 7200 4650
225NoConn ~ 7350 4650
226NoConn ~ 7500 4650
227NoConn ~ 7650 4650
228NoConn ~ 7800 4650
229NoConn ~ 8650 3650
230NoConn ~ 8650 3500
231NoConn ~ 8650 3350
232NoConn ~ 8650 3200
233NoConn ~ 8650 3050
234$Comp
235L CONN_1 P6
236U 1 1 4C71B116
237P 10400 1850
238F 0 "P6" H 10480 1850 40 0000 L CNN
239F 1 "CONN_1" H 10400 1905 30 0001 C CNN
240F 2 "PAD_120x60" H 10400 1850 60 0001 C CNN
241    1 10400 1850
242    1 0 0 -1
243$EndComp
244$Comp
245L CONN_1 P5
246U 1 1 4C71B10C
247P 10400 1650
248F 0 "P5" H 10480 1650 40 0000 L CNN
249F 1 "CONN_1" H 10400 1705 30 0001 C CNN
250F 2 "PAD_120x60" H 10400 1650 60 0001 C CNN
251    1 10400 1650
252    1 0 0 -1
253$EndComp
254NoConn ~ 5850 2900
255$Comp
256L R R2
257U 1 1 4C71B08A
258P 9100 2100
259F 0 "R2" V 9180 2100 50 0000 C CNN
260F 1 "100k" V 9100 2100 50 0000 C CNN
261F 2 "0603" H 9100 2100 60 0001 C CNN
262    1 9100 2100
263    -1 0 0 1
264$EndComp
265$Comp
266L R R1
267U 1 1 4C71B06B
268P 8650 1650
269F 0 "R1" V 8730 1650 50 0000 C CNN
270F 1 "1k" V 8650 1650 50 0000 C CNN
271F 2 "0603" H 8650 1650 60 0001 C CNN
272    1 8650 1650
273    0 -1 -1 0
274$EndComp
275NoConn ~ 7350 1850
276NoConn ~ 6750 1850
277NoConn ~ 6900 1850
278NoConn ~ 7050 1850
279NoConn ~ 7200 1850
280NoConn ~ 5850 2750
281$Comp
282L C8051F320 U1
283U 1 1 4C71AEC6
284P 7250 3250
285F 0 "U1" H 6250 4450 60 0000 C CNN
286F 1 "C8051F320" H 7250 3250 60 0000 C CNN
287F 2 "LQFP32" H 7250 3250 60 0001 C CNN
288    1 7250 3250
289    1 0 0 -1
290$EndComp
291Text Label 2700 3350 0 60 ~ 0
292D+
293Text Label 2700 3200 0 60 ~ 0
294D-
295$Comp
296L GND #PWR06
297U 1 1 4C6408C7
298P 4550 4800
299F 0 "#PWR06" H 4550 4800 30 0001 C CNN
300F 1 "GND" H 4550 4730 30 0001 C CNN
301    1 4550 4800
302    1 0 0 -1
303$EndComp
304$Comp
305L GND #PWR07
306U 1 1 4C6408C5
307P 4950 4800
308F 0 "#PWR07" H 4950 4800 30 0001 C CNN
309F 1 "GND" H 4950 4730 30 0001 C CNN
310    1 4950 4800
311    1 0 0 -1
312$EndComp
313$Comp
314L GND #PWR08
315U 1 1 4C6408BA
316P 5650 3050
317F 0 "#PWR08" H 5650 3050 30 0001 C CNN
318F 1 "GND" H 5650 2980 30 0001 C CNN
319    1 5650 3050
320    0 1 1 0
321$EndComp
322$Comp
323L GND #PWR09
324U 1 1 4C6408AD
325P 9200 4400
326F 0 "#PWR09" H 9200 4400 30 0001 C CNN
327F 1 "GND" H 9200 4330 30 0001 C CNN
328    1 9200 4400
329    1 0 0 -1
330$EndComp
331$Comp
332L GND #PWR010
333U 1 1 4C6408A3
334P 5300 6200
335F 0 "#PWR010" H 5300 6200 30 0001 C CNN
336F 1 "GND" H 5300 6130 30 0001 C CNN
337    1 5300 6200
338    1 0 0 -1
339$EndComp
340$Comp
341L GND #PWR011
342U 1 1 4C64089F
343P 2700 3850
344F 0 "#PWR011" H 2700 3850 30 0001 C CNN
345F 1 "GND" H 2700 3780 30 0001 C CNN
346    1 2700 3850
347    1 0 0 -1
348$EndComp
349$Comp
350L GND #PWR012
351U 1 1 4C640899
352P 1150 3850
353F 0 "#PWR012" H 1150 3850 30 0001 C CNN
354F 1 "GND" H 1150 3780 30 0001 C CNN
355    1 1150 3850
356    1 0 0 -1
357$EndComp
358$Comp
359L GND #PWR013
360U 1 1 4C640896
361P 3950 4900
362F 0 "#PWR013" H 3950 4900 30 0001 C CNN
363F 1 "GND" H 3950 4830 30 0001 C CNN
364    1 3950 4900
365    1 0 0 -1
366$EndComp
367$Comp
368L GND #PWR014
369U 1 1 4C64088F
370P 3650 4900
371F 0 "#PWR014" H 3650 4900 30 0001 C CNN
372F 1 "GND" H 3650 4830 30 0001 C CNN
373    1 3650 4900
374    1 0 0 -1
375$EndComp
376$Comp
377L GND #PWR015
378U 1 1 4C64088A
379P 3350 4900
380F 0 "#PWR015" H 3350 4900 30 0001 C CNN
381F 1 "GND" H 3350 4830 30 0001 C CNN
382    1 3350 4900
383    1 0 0 -1
384$EndComp
385Text Label 5500 6000 1 60 ~ 0
386GND
387Text Label 6900 6000 1 60 ~ 0
388C2D
389Text Label 5650 6000 1 60 ~ 0
390VBUS
391Text Label 6750 6000 1 60 ~ 0
392C2CK
393$Comp
394L VR VR3
395U 1 1 4C64034D
396P 3950 4450
397F 0 "VR3" V 4030 4450 50 0000 C CNN
398F 1 "5V6" V 3950 4450 50 0000 C CNN
399F 2 "0603" H 3950 4450 60 0001 C CNN
400    1 3950 4450
401    -1 0 0 -1
402$EndComp
403$Comp
404L VR VR2
405U 1 1 4C640343
406P 3650 4450
407F 0 "VR2" V 3730 4450 50 0000 C CNN
408F 1 "5V6" V 3650 4450 50 0000 C CNN
409F 2 "0603" H 3650 4450 60 0001 C CNN
410    1 3650 4450
411    -1 0 0 -1
412$EndComp
413$Comp
414L VR VR1
415U 1 1 4C6402FB
416P 3350 4450
417F 0 "VR1" V 3430 4450 50 0000 C CNN
418F 1 "5V6" V 3350 4450 50 0000 C CNN
419F 2 "0603" H 3350 4450 60 0001 C CNN
420    1 3350 4450
421    -1 0 0 -1
422$EndComp
423$Comp
424L R R3
425U 1 1 4C6402F2
426P 9200 3350
427F 0 "R3" V 9280 3350 50 0000 C CNN
428F 1 "68" V 9200 3350 50 0000 C CNN
429F 2 "0603" H 9200 3350 60 0001 C CNN
430    1 9200 3350
431    -1 0 0 -1
432$EndComp
433$Comp
434L LED D1
435U 1 1 4C6402EE
436P 9200 4000
437F 0 "D1" H 9200 4100 50 0000 C CNN
438F 1 "LTST-C190KTKR" H 9200 3900 50 0000 C CNN
439F 2 "0603" H 9200 4000 60 0001 C CNN
440    1 9200 4000
441    0 -1 1 0
442$EndComp
443$Comp
444L CONN_1 P1
445U 1 1 4C640203
446P 5500 6350
447F 0 "P1" H 5580 6350 40 0000 L CNN
448F 1 "CONN_1" H 5500 6405 30 0001 C CNN
449F 2 "PAD_120x60" H 5500 6350 60 0001 C CNN
450    1 5500 6350
451    0 1 1 0
452$EndComp
453$Comp
454L CONN_1 P4
455U 1 1 4C640202
456P 6900 6350
457F 0 "P4" H 6980 6350 40 0000 L CNN
458F 1 "CONN_1" H 6900 6405 30 0001 C CNN
459F 2 "PAD_120x60" H 6900 6350 60 0001 C CNN
460    1 6900 6350
461    0 1 1 0
462$EndComp
463$Comp
464L CONN_1 P3
465U 1 1 4C640200
466P 6750 6350
467F 0 "P3" H 6830 6350 40 0000 L CNN
468F 1 "CONN_1" H 6750 6405 30 0001 C CNN
469F 2 "PAD_120x60" H 6750 6350 60 0001 C CNN
470    1 6750 6350
471    0 1 1 0
472$EndComp
473$Comp
474L CONN_1 P2
475U 1 1 4C6401FE
476P 5650 6350
477F 0 "P2" H 5730 6350 40 0000 L CNN
478F 1 "CONN_1" H 5650 6405 30 0001 C CNN
479F 2 "PAD_120x60" H 5650 6350 60 0001 C CNN
480    1 5650 6350
481    0 1 1 0
482$EndComp
483$Comp
484L C C1
485U 1 1 4C6401B3
486P 4550 4400
487F 0 "C1" H 4600 4500 50 0000 L CNN
488F 1 "100nF" H 4600 4300 50 0000 L CNN
489F 2 "0603" H 4550 4400 60 0001 C CNN
490    1 4550 4400
491    1 0 0 -1
492$EndComp
493$Comp
494L C C2
495U 1 1 4C6401AA
496P 4950 4400
497F 0 "C2" H 5000 4500 50 0000 L CNN
498F 1 "1uF" H 5000 4300 50 0000 L CNN
499F 2 "0603" H 4950 4400 60 0001 C CNN
500    1 4950 4400
501    1 0 0 -1
502$EndComp
503NoConn ~ 2700 3500
504$Comp
505L MINI_USB_B CON1
506U 1 1 4C609C5C
507P 1900 3350
508F 0 "CON1" H 1900 3850 60 0000 C CNN
509F 1 "MINI_USB_B" H 1900 2850 60 0000 C CNN
510F 2 "miniUSB_B" H 1900 3350 60 0001 C CNN
511    1 1900 3350
512    -1 0 0 -1
513$EndComp
514$EndSCHEMATC
515

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