Logic Soj Ntsuam Nrog Kev Tshawb Pom Pulse: 8 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Qhov ob TRANSISTOR LOGC PROBE qhia los ntawm jazzzzz

www.instructables.com/id/Two-Transistor-Logic-Probe/

yog qhov yooj yim - tab sis tsis yog ruam - nws ua haujlwm tau zoo txiav txim siab qib kev xav ntawm TTL thiab CMOS. Qhov ob TRANSISTOR LOGC PROBE

• tsis ua haujlwm ntawm ntau dua 500kHz thiab
• 1ms tsis tuaj yeem pom.

Kauj Ruam 1: Tshawb Pom Pulses

Ib lub voj voog uas muaj MOSFET, ob lub diodes, ob lub capacitors ib qho LED thiab cov resister daws qhov teeb meem no.

Yog tias qhov kev sojntsuam pom tus mem tes LED yuav ci rau 1 thib ob. Cov xov xwm zoo: nws yuav kuaj pom tus mem tes nkaus xwb mus rau 100ns.

Kauj Ruam 2: Nws Ua Haujlwm Li Cas

Qhov nce ntawm cov mem tes thauj ob lub capacitors ntawm C1 - D3 - C2. Qhov hluav taws xob ntawm C2 nce ntau ntau dua li ntawm C1. Qhov hluav taws xob ntawm C2 yog lub qhov rooj hluav taws xob ntawm MOSFET. MOSFET qhib thiab LED teeb tuaj.

Lub capacitor C1 raug tso tawm los ntawm qhov xau tam sim no ntawm diode D3. MOSFET hloov tawm thaum C2 raug tso tawm.

Ntog ntog ntawm lub teeb liab tawm C1 tawm ntawm diode D2.

Lub sijhawm tsis zoo txiav txim siab vim nws nyob ntawm diode D3. Tej zaum nws yuav tsim nyog hloov pauv cov capacitors: tsis muaj C2 thiab/lossis C1 = 100pF. Tus tiv thaiv ntawm 20MΩ tuaj yeem daws qhov teeb meem tab sis nws tsis yooj yim los yuav.

Kauj Ruam 3: Kuaj Lub Ntsuas Ntsuas Ntsuas ntawm Lub Rooj Mov Mov

Daim duab qhia pom lub plawv dhia ntsuas ntawm sab xis.

LED yuav luag tag. Tias yog vim li cas lub Circuit Court yog rhiab heev. Peb yuav tsum muab lub resistor nruab nrab ntawm cov tswv yim thiab hauv av.

Txuas cov tswv yim mus rau qhov zoo, teeb lub LED rau ib pliag. Lub sijhawm no nyob ntawm tus capacitor C2. Lub Circuit Court tseem ua haujlwm yam tsis muaj C2. Cov LED teeb pom kev luv dua. Qhov ua rau yog lub qhov rooj capacitance ntawm MOSFET.

Yog tias muaj cov pa taws ntawm qhov nkag ntawm lub teeb LED txhua lub sijhawm. Ntawm qhov zaus qis dua 1Hz nws nyem.

Nws tseem teeb ntawm 20Mhz.

74HC00 nyob rau sab laug tsim cov noob luv luv.

Kauj Ruam 4: Xeem Pulse luv heev

Peb xav tau lub tshuab hluav taws xob tsim hluav taws xob luv luv.

Peb siv ob lub NAND rooj vag ntawm 74HC00. Lub qhov rooj IC2A hloov pauv lub tswv yim T. Lub qhov rooj thib ob tsis yog ((tsis yog T) thiab T). Txhua qhov yog 1. Lub qhov rooj IC2A xav tau qee lub sijhawm los tsim nws cov txiaj ntsig. Yog T yog 0 thiab hloov mus rau 1 ces IC2A yog lub sijhawm luv tseem 1 thiab lub rooj vag IC2B tau txais lub sijhawm luv luv 1 ntawm ob qho kev nkag mus. IC2B tsim qhov luv 0 qhov ntsia hlau loj. Qhov spike no yog thaj tsam ntawm 10ns.

Ib tus kws tshaj lij ntsuas phom yuav kuaj pom qhov nce siab ntawm 10ns tab sis yog peb li. Peb tuaj yeem ncab qhov ntsia hlau ntsia hlau siv lub capacitor C2 = 100pF ntawm qhov tso tawm ntawm IC2A. Tom qab ntawd qhov ntsia hlau loj yog li 200ns.

Peb cov ntsia hlau ntsia pom cov ntsia hlau loj ntawm 200ns.

Kauj Ruam 5: Txhim Kho Ob Qhov Transistor Logic Soj Ntsuam

Jazzzzz logic sojntsuam

www.instructables.com/id/Two-Transistor-Log…

tuaj yeem txhim kho.

Peb ntxig ib qho ntxiv resistor thiab zener (D1).

Lub zener txwv qhov hluav taws xob rau 3.3V. Then cov LEDs yeej tsis dim ntawm qhov siab tshaj 4V. Lub zener txhim kho kev nrhiav pom ntawm LOW.

U0 = Uz - Uled - Ube = 3.3V - 2.2V - 0.6V = 0.5V

Qhov no yog nyob ntawm thaj tsam ntawm 0.4V txog 0.8V ntawm TTL Tsawg. Qhov hluav taws xob ntawm ntsuab LED yog 2.2V.

Qib siab nyob ntawm qhov hluav taws xob ntawm LED liab thiab yog

U1 = Uled + Ube = 1.8V + 0.6V = 2.4V.

Nov yog TTL Qib Siab.

Lub zener ntawm 3.3V yog qhov tseem ceeb. Yuav siv ZF3.3, BZX79-C3V3, 1N5226B lossis 1N4728A ca.

Kauj Ruam 6: Muab Nws Ua Ke

Yog tias peb muab lub ntsuas ntshav mem tes thiab lub transistor logic sojntsuam ua ke peb tau txais cov lus sojntsuam muaj txiaj ntsig. LED4 tsis tau tsuas yog tso los tiv thaiv LED3 tiv thaiv kev rov qab polarity tab sis los qhia qhov no.

Cov txheej txheem ntawm kev tshawb fawb logic tau tsim rau BC337 thiab BC327. Lub tiaj tiaj ntawm cov transistors nyob ntawm lub pc pc. 2N4401 thiab 2N4403 yuav ua haujlwm ib yam tab sis tus pinning tau thim rov qab. Yog li lawv yuav tsum tau muab ntxig nrog puag ncig.

Qhov kev sojntsuam logic yog tsim rau ntawm lub rooj tsavxwm vero thiab muab tso rau hauv lub raj yas ntsws.

Kauj Ruam 7: Cov txiaj ntsig

Logic sojntsuam

• yog cheep heev, tsuas yog qee xees
• ua haujlwm ntawm 3V txog 12V

• kuaj pom TTL thiab CMOS qib

  • Tsawg @ 3.3V = 0.5V
  • Tsawg @ 5.5V = 0.7V
  • Siab @ 3V rau 12V = 2.2V
• yog tiv thaiv tiv thaiv rov qab voltage mus txog 12V thiab
• input voltage -12V rau +12V

• paub

  • Tsawg/Siab (ntsuab/liab LED) txog 100kHz @ 3.3V thiab 500kHz @ 5V
  • ib zaug pulses nqis mus rau 200ns
  • zaus mus txog 20MHz (xiav LED)

• thim

  • cov khoom siv tam sim no tsawg dua 7mA @ 5V
  • cov tswv yim tam sim no tsawg dua 25µA
• muaj peev xwm tawm tswv yim txog 150pF.

Kauj Ruam 8: Cov Lus Qhia Ntxiv

Koj tuaj yeem tau txais cov ntaub ntawv ntau ntxiv (hauv German) ntawm kev tshawb fawb logic

Ib qho yooj yim heev sojntsuam 2 LEDs thiab 2 tus tiv thaiv:

• Logic sojntsuam kuaj pom 10ns:

  praktische-elektronik.dr-k.de/Projekte/Log…

• Yuav ua li cas txhawm rau txhawm rau txhawm rau:

  praktische-elektronik.dr-k.de/Praktikum/Dig…