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Index 436

820e computer motherboard circuit diagram 09

Published:2011/10/26 1:51:00 Author:Ecco | Keyword: computer motherboard

820e computer motherboard circuit diagram 09
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820e computer motherboard circuit diagram 08

Published:2011/10/26 1:49:00 Author:Ecco | Keyword: computer motherboard

820e computer motherboard circuit diagram 08
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820e computer motherboard circuit diagram 07

Published:2011/10/26 1:49:00 Author:Ecco | Keyword: computer motherboard

820e computer motherboard circuit diagram 07
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820e computer motherboard circuit diagram 06

Published:2011/10/26 1:48:00 Author:Ecco | Keyword: computer motherboard

820e computer motherboard circuit diagram 06
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820e computer motherboard circuit diagram 05

Published:2011/10/26 1:48:00 Author:Ecco | Keyword: computer motherboard

820e computer motherboard circuit diagram 05
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820e computer motherboard circuit diagram 04

Published:2011/10/26 1:47:00 Author:Ecco | Keyword: computer motherboard

820e computer motherboard circuit diagram 04
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820e computer motherboard circuit diagram 03

Published:2011/10/26 1:47:00 Author:Ecco | Keyword: computer motherboard

820e computer motherboard circuit diagram 03
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555 timer circuit for darkroom 3

Published:2011/10/18 3:44:00 Author:Ecco | Keyword: 555, darkroom , timer circuit

555 timer circuit for darkroom 3
As the figure 17-16 shown, the timing circuit is composed of two branches of 555, IC1 forms a timer, IC2 is a second signal metronome. AN1 is the timer button, clicking the AN1, 555 sets, J pulls in, light exposure lamp H1 is lit, safelight H2 is off. K1 is regular file, when the C1 (or C2) is charged to more than 2/3 threshold level, the 555 resets, J releases. H1 is off, H2 is lit, exposure ended. IC2 and RP2, R4, R5, C4 etc. form astable multivibrator, adjusting the RP2 can make the oscillation be 1Hz. The output of it drives red LED lighting by VT1. (View)

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RS232C Pin and diagonal connection

Published:2011/10/18 3:44:00 Author:Ecco | Keyword: Pin , diagonal connections

RS232C Pin and diagonal connection

FG, SG-Frame Ground- the ground wire connected to the machineTXD, SD-Transmitted Data- data output line RXD, RD-Received Data-data input line RTS, RS-Request to Send- Request to Send dataCTS, CS-Clear to Send data- it responds to other permission and tells the other party that it can send. DSR, DR-Data Set Ready- it can inform the machine is in standby state.DTR, ER-Data Terminal Ready- Data Terminal is informed on standby state.CD, CD-Carrier Detect-carrier detection, which is used to confirm receipt of the Modem carrierSG, SG-Signal Ground-Signal ground line (The signal line is the zero standard line) (View)

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Self-made AVRISP download rom recorder

Published:2011/10/18 3:39:00 Author:Ecco | Keyword: Self-made , AVRISP, download , rom recorder

Self-made AVRISP download rom recorder
Comparing with an ISP download cable with 74LS244 parallel port, the line and principles of this AVRISP is slightly more complicated. But it has advantages:the serial port's download performanceis more stable than a parallel port, it needs 8 seconds to complete by testing 16k program, and its speed is also fast when it is improved 3.6-firmware. In addition, to the users who are short for parallel port, it is a good choice. (View)