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http://www.sigrok.org/wiki/Main_PageThesigrokproject aims at creating aportable, cross-platform, Free/Libre/Open-Source signal analysis software suitethat supports various device types, such aslogic analyzers,MSOs,oscilloscopes,multimeters,LCR meters,sound level meters,thermometers,hygrometers,anemo 阅读全文
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http://www.willar.com/article/article_view.asp?id=463由DC-DC变换集成电路MC34063组成，34063 广泛应用于于DC-DC的电源转换电路中，本电路中的34063 接成升压电路形式，将5V电压升压到12-14.5V，得到编程所需的Vpp电压，R8、R9、R10组成电压取样电路。R11和Q1组成14V VPP电压切换电路Vout(输出电压)＝1.25V（１＋R2／R1）= 1.25V * ( (R1+R2) / R1 )R1=R10+R9=0.56K + 1.8K=2.36KR2=R8=20KVout = 1.25 * ( ( 2.36 阅读全文
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Voltage Translation for Analog to Digital Interface ADChttp://openschemes.com/2010/03/23/zeroplus-logic-cube-review-and-teardown/LAP 16032 has 4.5MBIT... 阅读全文
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http://www.faludi.com/bwsn/xbee-level-shifting/The XBee communication (RX/TX) pins definitelyoperateoff of a 5V signal with the Arduino. We’ve seen this a lot and done this a lot, and it certainly keeps things simple. That said, there’s nothing wrong with adding a level-shifting circuit to deliver 3 阅读全文
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http://www.daycounter.com/Circuits/Level-Translators/Level-Translators.phtmlInterfacing 5V and 3V logic circuits is a common task. 3V logic is preferred to 5V logic because it consumes less power, so most microcontrollers and peripheral devices use the lower voltage logic. However, it is often the c 阅读全文
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http://www.daycounter.com/Circuits/Short-Circuit-Protection/Short-Circuit-Protection.phtmlShort circuit protection is often a desirable feature to add to power amplifiers or power supplies, for both safety concerns and protection of circuitry.The circuit in the schematic below can be used to protect 阅读全文
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http://electronicdesign.com/boards/non-inverting-level-shifter-requires-only-one-op-amp-one-supply-voltageWith portable battery-operated devices continuing to add functionality while shrinking in size, printed-circuit-board real estate becomes increasingly valuable. Single-supply circuitry can help 阅读全文
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SN7407Convert TTL Voltage Levels to MOS LevelsHigh Sink-Current CapabilityInput Clamping Diodes Simplify SystemDesignOpen-Collector Driver for Indicator Lampsand RelaysInputs Fully Compatible With Most TTLCircuitsThese TTL hex buffers/drivers featurehigh-voltage open-collector outputs for interfacin 阅读全文
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http://debugmo.de/2012/02/xvcd-the-xilinx-virtual-cable-daemon/I recently discovered an almost undocumented function in Xilinx ISE: the Xilinx virtual cable driver. It’s basically “a platform cable without a platform cable” (asmarcansaid so nicely) – it allows you use Impact (and Chipscope, and all 阅读全文
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74HC125; 74HCT125Quad buffer/line driver; 3-stateThe 74HC125; 74HCT125 is a quad buffer/line driver with 3-state outputs controlled by the output enable inputs (nOE). A HIGH on nOE causes the outputs to assume a high impedance OFF-state. Inputs include clamp diodes. This enables the use of current l 阅读全文