DDD888 发表于 18-2-2018 08:51
我想实现机械开关不焊接在电路板pcb上,这样如果键盘机械开关坏了，我只要将坏的拿掉，插上好的就行了,我想 ...
这个是原理图
https://github.com/ErgoDox-EZ/docs/blob/master/ErgoDox%20EZ%20Schematic.pdf
根据我另一半的结论，我没有自己做，我网上订购了个现成的,就这个https://ergodox-ez.com/，先买一部分，花了nzd370
我给我的很热的无线路由器加的电风扇:loveliness:
内部的连接
这个可能是澳洲本地最好的一个电子电工爱好帖。:good
我买了rigol 1054z
https://s.taobao.com/search?q=rigol+1054z&imgfile=&commend=all&ssid=s5-e&search_type=item&sourceId=tb.index&spm=a21bo.2017.201856-taobao-item.1&ie=utf8&initiative_id=tbindexz_20170306
打算拿到手后就升级到带宽100兆:lol
DDD888 发表于 4-4-2018 19:10
我买了rigol 1054z
https://s.taobao.com/search?q=rigol+1054z&imgfile=&commend=all&ssid=s5-e&search ...
没明白，100MHZ的示波器可以测试什么？和带宽100mbps有什么关系？
QWERTYASDFG 发表于 5-4-2018 10:44
没明白，100MHZ的示波器可以测试什么？和带宽100mbps有什么关系？
我只知道越大越好啦:lol
DDD888 发表于 5-4-2018 12:19
我只知道越大越好啦
哦，我以为之间有什么特别的关系。示波器可测试的频率范围也不是越大越好，我理解测试高频的方法只是设备里通过降频，把高频信号转换成低频来测试的。如果直接测试高频信号，线路板之间的屏蔽隔离是比较麻烦的技术问题。打个比方说，如果买个车上下班用的话，为了追求速度去买个火箭，不一定更好用。
我的显微镜
DDD888 发表于 16-4-2018 16:16
我的显微镜
光学还是电子的？如果光学的倍数太大，视角就会太小，而且变形也比较厉害。用来观察还行，用来操作因为焦距太短，无法在镜片和零件之间放入任何设备。感觉单片镜的放大倍率在5-10倍左右的还不错。再高就不太好用了。多片镜的因为需要减少畸变情况，会选用较小的镜片，而损失较多的光通量，也不方便观察和操作。电子的虽然没有这个问题，但要想获得比较高的放大倍数，需要高清晰度的感光芯片。否则放大以后图像清晰度不够。高清芯片非常不便宜。
本帖最后由 DDD888 于 17-4-2018 19:13 编辑
QWERTYASDFG 发表于 17-4-2018 14:08
光学还是电子的？如果光学的倍数太大，视角就会太小，而且变形也比较厉害。用来观察还行，用来操作因为焦 ...
raspberrypi 3 + https://www.ebay.com/itm/Raspberry-Pi-Camera-Module-5-Megapixel-OV5647-Sensor-Adjustable-focus-Kit/261382553063?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
镜头和观察物的距离有六厘米左右，应该算还可以
我的示波器
今天，我用了下新买的示波器，非常好用:loveliness:
中国产的东西，质量堪忧啊。连续两次中招，都是虚焊，我擦
本帖最后由 DDD888 于 19-4-2018 07:39 编辑
lummar 发表于 18-4-2018 22:46
中国产的东西，质量堪忧啊。连续两次中招，都是虚焊，我擦
但不是中国产的示波器价格太贵啦,另外你也不知道标的是美国公司的牌子，产地可能就是中国
https://www.tek.com/oscilloscope/tbs1000-digital-storage-oscilloscope
DDD888 发表于 19-4-2018 07:36
但不是中国产的示波器价格太贵啦,另外你也不知道标的是美国公司的牌子，产地可能就是中国
https://w ...
是的。现在貌似什么都脱离不了中国。中国的东西价格还算可以，勉强够用，不过如果要是人工焊接，质量就参差不齐。我说的两个虚焊都是温度过高，焊锡发白。一看都是不合格的焊点。不过奇怪的是居然还支撑了好几年。如果没有虚焊，寿命会是几何？
DDD888 发表于 26-10-2017 05:43
我买了块可以让我调节输出电压的元件https://www.ebay.com/itm/LTC3780-Automatic-lifting-pressure-Consta ...
刚刚看了下spec，板子本身貌似是带15A保险丝的。你这个看样子是板子有问题
lummar 发表于 19-4-2018 20:20
刚刚看了下spec，板子本身貌似是带15A保险丝的。你这个看样子是板子有问题
高手啊
我买来一接，短路冒烟吓死我，我以为我接线错误，所以没有向卖家要退货，现在是坏的在那空放着
lummar 发表于 19-4-2018 20:06
是的。现在貌似什么都脱离不了中国。中国的东西价格还算可以，勉强够用，不过如果要是人工焊接，质量就参 ...
我买的第一个日本的kenwood的几十年用过的旧的示波器，运到我家的时候，输入信号没有波形，卖家说一切都好，我拆开机器一看，原来是连输入信号的电阻拖开了，所以我焊好后就可以正常使用了，现在和新的示波器一起用，但显然新的数字示波器太好用了
DDD888 发表于 20-4-2018 06:50
我买的第一个日本的kenwood的几十年用过的旧的示波器，运到我家的时候，输入信号没有波形，卖家说一切都 ...
运输过程中暴力装卸太普遍了:(
电子设备基本都一样，买新不买旧。新的往往更好更便宜
我用fpga连r2r电阻数字转模拟输出信号在我的示波器上
本帖最后由 DDD888 于 21-4-2018 12:18 编辑
lummar 发表于 20-4-2018 20:12
运输过程中暴力装卸太普遍了
电子设备基本都一样，买新不买旧。新的往往更好更便宜
是的，但小米路由器除外
我原先买了小米的2根天线的觉得挺好，就又买了小米的四根天线的，结果四根天线的用了一年坏了，拆开一看，两根天线的有贴很大的铁片在背后作散热，四根的竟然没有大的散热片，垃圾
-----------------------------------------------------
当初买旧的示波器是感觉旧的便宜，新的算上运费税收太贵了，这次碰巧可以从中国带过来，就买个新的啦
我写的verilog代码
module top (
inputclk,
output LED1,
output LED2,
output PIO1_02,
output PIO1_03,
output PIO1_04,
output PIO1_05,
output PIO1_06,
output PIO1_07
);
reg data1 = 1'b1;
reg counter;
reg index;
reg result;
reg state;
assign LED1 = state;
assign LED2 = data1;
assign PIO1_02 = result;
assign PIO1_03 = result;
assign PIO1_04 = result;
assign PIO1_05 = result;
assign PIO1_06 = result;
assign PIO1_07 = result;
assign index = counter;
assign state = counter;
always @(posedge clk) begin
counter <= counter + 1;
case(index)
0: result <= 32;
1: result <= 35;
2: result <= 38;
3: result <= 41;
4: result <= 44;
5: result <= 47;
6: result <= 50;
7: result <= 52;
8: result <= 55;
9: result <= 57;
10: result <= 59;
11: result <= 60;
12: result <= 62;
13: result <= 63;
14: result <= 63;
15: result <= 63;
16: result <= 63;
17: result <= 63;
18: result <= 63;
19: result <= 63;
20: result <= 62;
21: result <= 60;
22: result <= 59;
23: result <= 57;
24: result <= 55;
25: result <= 52;
26: result <= 50;
27: result <= 47;
28: result <= 44;
29: result <= 41;
30: result <= 38;
31: result <= 35;
32: result <= 32;
33: result <= 29;
34: result <= 26;
35: result <= 23;
36: result <= 20;
37: result <= 17;
38: result <= 14;
39: result <= 12;
40: result <= 9;
41: result <= 7;
42: result <= 5;
43: result <= 4;
44: result <= 2;
45: result <= 1;
46: result <= 1;
47: result <= 0;
48: result <= 0;
49: result <= 0;
50: result <= 1;
51: result <= 1;
52: result <= 2;
53: result <= 4;
54: result <= 5;
55: result <= 7;
56: result <= 9;
57: result <= 12;
58: result <= 14;
59: result <= 17;
60: result <= 20;
61: result <= 23;
62: result <= 26;
63: result <= 29;
endcase
end
endmodule
icestick.pcf
set_io --warn-no-port RX 9
set_io --warn-no-port TX 8
set_io LED1 99
set_io LED2 98
set_io LED3 97
set_io LED4 96
set_io LED5 95
set_io clk 21
# # Pmod connector
set_io PIO1_02 78 # Pin 1
set_io PIO1_03 79 # Pin 2
set_io PIO1_04 80 # Pin 3
set_io PIO1_05 81 # Pin 4
set_io PIO1_06 87 # Pin 7
set_io PIO1_07 88 # Pin 8
set_io PIO1_08 90 # Pin 9
set_io PIO1_09 91 # Pin 10
DDD888 发表于 21-4-2018 11:54
是的，但小米路由器除外
小米。。。
从来不在选项之内。。。
任他雷布斯怎么忽悠，不买就是不买
这是八位的D/A
module top (
inputclk,
output LED1,
output LED2,
output PIO1_02,
output PIO1_03,
output PIO1_04,
output PIO1_05,
output PIO1_06,
output PIO1_07,
output PIO1_08,
output PIO1_09
);
reg data1 = 1'b1;
reg counter;
reg index;
reg result;
reg state;
assign LED1 = state;
assign LED2 = data1;
assign PIO1_02 = result;
assign PIO1_03 = result;
assign PIO1_04 = result;
assign PIO1_05 = result;
assign PIO1_06 = result;
assign PIO1_07 = result;
assign PIO1_08 = result;
assign PIO1_09 = result;
// 47.2khz
assign index = counter;
// 5.87khz
//assign index = counter;
// 23hz
//assign index = counter;
assign state = counter;
always @(posedge clk) begin
counter <= counter + 1;
case(index)
0: result <= 128;
1: result <= 131;
2: result <= 134;
3: result <= 137;
4: result <= 141;
5: result <= 144;
6: result <= 147;
7: result <= 150;
8: result <= 153;
9: result <= 156;
10: result <= 159;
11: result <= 162;
12: result <= 165;
13: result <= 168;
14: result <= 171;
15: result <= 174;
16: result <= 177;
17: result <= 180;
18: result <= 183;
19: result <= 186;
20: result <= 188;
21: result <= 191;
22: result <= 194;
23: result <= 196;
24: result <= 199;
25: result <= 202;
26: result <= 204;
27: result <= 207;
28: result <= 209;
29: result <= 212;
30: result <= 214;
31: result <= 216;
32: result <= 219;
33: result <= 221;
34: result <= 223;
35: result <= 225;
36: result <= 227;
37: result <= 229;
38: result <= 231;
39: result <= 233;
40: result <= 234;
41: result <= 236;
42: result <= 238;
43: result <= 239;
44: result <= 241;
45: result <= 242;
46: result <= 244;
47: result <= 245;
48: result <= 246;
49: result <= 247;
50: result <= 249;
51: result <= 250;
52: result <= 250;
53: result <= 251;
54: result <= 252;
55: result <= 253;
56: result <= 254;
57: result <= 254;
58: result <= 255;
59: result <= 255;
60: result <= 255;
61: result <= 255;
62: result <= 255;
63: result <= 255;
64: result <= 255;
65: result <= 255;
66: result <= 255;
67: result <= 255;
68: result <= 255;
69: result <= 255;
70: result <= 255;
71: result <= 254;
72: result <= 254;
73: result <= 253;
74: result <= 252;
75: result <= 251;
76: result <= 250;
77: result <= 250;
78: result <= 249;
79: result <= 247;
80: result <= 246;
81: result <= 245;
82: result <= 244;
83: result <= 242;
84: result <= 241;
85: result <= 239;
86: result <= 238;
87: result <= 236;
88: result <= 234;
89: result <= 233;
90: result <= 231;
91: result <= 229;
92: result <= 227;
93: result <= 225;
94: result <= 223;
95: result <= 221;
96: result <= 219;
97: result <= 216;
98: result <= 214;
99: result <= 212;
100: result <= 209;
101: result <= 207;
102: result <= 204;
103: result <= 202;
104: result <= 199;
105: result <= 196;
106: result <= 194;
107: result <= 191;
108: result <= 188;
109: result <= 186;
110: result <= 183;
111: result <= 180;
112: result <= 177;
113: result <= 174;
114: result <= 171;
115: result <= 168;
116: result <= 165;
117: result <= 162;
118: result <= 159;
119: result <= 156;
120: result <= 153;
121: result <= 150;
122: result <= 147;
123: result <= 144;
124: result <= 141;
125: result <= 137;
126: result <= 134;
127: result <= 131;
128: result <= 128;
129: result <= 125;
130: result <= 122;
131: result <= 119;
132: result <= 115;
133: result <= 112;
134: result <= 109;
135: result <= 106;
136: result <= 103;
137: result <= 100;
138: result <= 97;
139: result <= 94;
140: result <= 91;
141: result <= 88;
142: result <= 85;
143: result <= 82;
144: result <= 79;
145: result <= 76;
146: result <= 73;
147: result <= 70;
148: result <= 68;
149: result <= 65;
150: result <= 62;
151: result <= 60;
152: result <= 57;
153: result <= 54;
154: result <= 52;
155: result <= 49;
156: result <= 47;
157: result <= 44;
158: result <= 42;
159: result <= 40;
160: result <= 37;
161: result <= 35;
162: result <= 33;
163: result <= 31;
164: result <= 29;
165: result <= 27;
166: result <= 25;
167: result <= 23;
168: result <= 22;
169: result <= 20;
170: result <= 18;
171: result <= 17;
172: result <= 15;
173: result <= 14;
174: result <= 12;
175: result <= 11;
176: result <= 10;
177: result <= 9;
178: result <= 7;
179: result <= 6;
180: result <= 6;
181: result <= 5;
182: result <= 4;
183: result <= 3;
184: result <= 2;
185: result <= 2;
186: result <= 1;
187: result <= 1;
188: result <= 1;
189: result <= 0;
190: result <= 0;
191: result <= 0;
192: result <= 0;
193: result <= 0;
194: result <= 0;
195: result <= 0;
196: result <= 1;
197: result <= 1;
198: result <= 1;
199: result <= 2;
200: result <= 2;
201: result <= 3;
202: result <= 4;
203: result <= 5;
204: result <= 6;
205: result <= 6;
206: result <= 7;
207: result <= 9;
208: result <= 10;
209: result <= 11;
210: result <= 12;
211: result <= 14;
212: result <= 15;
213: result <= 17;
214: result <= 18;
215: result <= 20;
216: result <= 22;
217: result <= 23;
218: result <= 25;
219: result <= 27;
220: result <= 29;
221: result <= 31;
222: result <= 33;
223: result <= 35;
224: result <= 37;
225: result <= 40;
226: result <= 42;
227: result <= 44;
228: result <= 47;
229: result <= 49;
230: result <= 52;
231: result <= 54;
232: result <= 57;
233: result <= 60;
234: result <= 62;
235: result <= 65;
236: result <= 68;
237: result <= 70;
238: result <= 73;
239: result <= 76;
240: result <= 79;
241: result <= 82;
242: result <= 85;
243: result <= 88;
244: result <= 91;
245: result <= 94;
246: result <= 97;
247: result <= 100;
248: result <= 103;
249: result <= 106;
250: result <= 109;
251: result <= 112;
252: result <= 115;
253: result <= 119;
254: result <= 122;
255: result <= 125;
endcase
end
endmodule
感觉用面包板太麻烦了，干脆就将电阻固定下来
我将我新买的主板换到坏的lg电视机上，但开出来的图像是旋转180度，请教大家，这如何解决啊？谢谢:loveliness:
DDD888 发表于 22-4-2018 10:01
我将我新买的主板换到坏的lg电视机上，但开出来的图像是旋转180度，请教大家，这如何解决啊？谢谢:loveline ...
我根据该录像解决了屏幕翻转问题
https://www.youtube.com/watch?v=reUEi6laRnA
https://www.askvg.com/secret-service-codes-for-sony-and-lg-tv/