PC related schematics

1. 12-Bit Data Acquisition System (PDF)
2. 16 Byte DiY ROM
3. 160 Baud ALDL Hardware Interface
4. 24-Line Parallel Interface (PDF)
5. 3D glasses
6. 4-CHANNEL 8-BIT ANALOG-TO-DIGITAL CONVERTER FOR PC
7. 5V Supply Derives Power From 3-Wire RS-232 Port
8. 7 segment rolling display using PC
9. 8 CHANNEL PARALLEL IN / OUT
10. 8255A - ISA BUS
11. 8255 Expansion of Parallel Port
12. 9 to 9 Pin Nullmodem Cable
13. Apple II/II+/IIe IDE Drive Interface
14. Bar Code Scanner
15. BAYCOM PACKET
16. CD-ROM audio connectors
17. Centronics port D/A converters and low-pass filter
18. Compact Flash to IDE Schematic (PDF)
19. Computer Microphone
20. Computerised Universal Timer (PDF)
21. Connecting computer soundcard to telephone line
22. Control electrical appliances using PC
23. DEMOWEB
24. Dangers and problems of ungrounded PC
25. Digital Signals Decoding Interfaces
26. DS1621 PC thermometer
27. Electrical Equipment Control UsingPC
28. Fax to Modem interface
29. Frequency Measurements Using PC
30. General purpose ISA parallel I-O-card
31. Generating DTMF tones using soundcard
32. Headphone driving circuit for soundcards
33. How to Build a Basic Stamp and PC Relay Controller
34. HAMCOMM MODEM
35. Hf-225 RS232 Interface
36. Hi-Fi PC Speaker System
37. How light pen and light gun works
38. How to connect two CD-ROM drives to one soundcard
39. How to get power from RS-232 port
40. How to get power from PC to your circuits
41. How to read audio CDs using CD-ROM
42. HC-01 Schematic
43. I2C Printer Port Adapter Schematic
44. iLINK INTERFACE (PDF)
45. Interface between Ericsson 6xx/7xx phones and a PC
46. Interfacing the Parallel Port to a 16 Character x 2 Line LCD
47. IrDA - Printer Adapter
48. Irda Serial Receiver
49. ISA
50. ISA Bus - Input Port
51. ISA Bus - Output Port
52. ISOLATED FULL DUPLEX
53. Koračni motor preko računara
54. Laptop Computer Serial Port Power Booster
55. LED Amplifier
56. LPT 25pin / 4pin Connector
57. LPT Port
58. LPT Port 2
59. LPT Port 3
60. LPT Relay Driver
61. Mac Serial Port (RS-422 DIN-8) to RS-232 DB-25
62. Null Printer Adapter
63. Pacsat Modem
64. Parallel Port - 8 Data to 64 Bit Latch
65. Parallel Port Relay Interface
66. Parellel port output
67. Parallel Port Switch
68. PC-Based 7-Segment Rolling Display
69. PC Based Oscilloscope (PDF)
70. PC-Based Digital Storage Oscilloscope
71. PC based Frequency Meter
72. PC-Based LowFER Frequency Synthesizer
73. PC joystick interface
74. PC mouse information
75. PC Parallel and Serial Port Interfacing
76. PC Parallel Port Relay Board (PDF)
77. PC power supply connectors
78. PC Servo Controller
79. PC serial port buffer
80. PC Serial Port Receiver
81. PC speaker volume control
82. PC Stick
83. Pocket Sampler (PDF)
84. Power from RS-232
85. Powering devices from PC parallel port
86. Radio Clock for PC
87. R5000 Computer Interface
88. RS232 Connections, and wiring up serial devices
89. RS232C Level Converter
90. RS-232 Protocol Analyser
91. RS-232 surge protection
92. S-PDIF Interface
93. Sega 3D glass interfacing
94. Serial-Driven Infrared Remote Controller
95. Serial Isolated Input/Output Module (PDF)
96. Serial Infrared Remote Controller
97. Serial Port A/D-converter
98. Serial Port Driven, 16-bit A/D Converter
99. Simple Parallel (Printer) Port Interface
100. Simple PC smartcard reader
101. Simple RS232C Level Converter using Transistors
102. SmartCard PC Emulator
103. SmartCard Programmer
104. Smart Temperature Sensor (PDF)
105. Sound Blaster Microphone Preamplifier
106. Sound Card Interface with Tone Keyer
107. Soundcard tips and facts
108. Stereo Tape Head Preamplifier for PC Sound Card (PDF)
109. Strobo controlling with PC using RS-232 port
110. Universal PC Interface (9 p)
111. Universal PC Interface (25 p)
112. USB to RS232 Dongle
113. WEB Thermometer
114. X10 MR26A Macintosh Serial Cable