convertor frecventa/tensiune

[niq_ro]

vreau si eu ceva scheme de convertoare frecventa/tensiune...in afara de LM2907vreau ceva "low cost" ..ceva cu 555.. de exemplu

[niq_ro]

cred ca ma pot folsi de schema de la http://www.electronics-tutorials.com/de ... ometer.htm

 

A tachometer is simply a means of counting the engine revolutions of an automobile engine. In this suggested idea a NE555 timer is configured as a monostable or one shot. The period of the 555 timer for our car tachometer is determined by the resistor from the 9V regulated supply to pin 7 (50K) and the capacitor from pin 6 and ground (0.1 uF). Time "T" = 1.1 RC or 1.1 X 50,000 X 0.1 X10 -6 = 0.0055 or 5.5 mS (milli-seconds).

[Craciun]

Daca ai putina rabdare iti scanez eu din cartea IPRS.

[niq_ro]

Daca ai putina rabdare iti scanez eu din cartea IPRS.

bineinteles ca am... multumesc anticipat

[Craciun]

Uite aici schema

 

Dar in opinia mea nu exceleaza in perfomante privind precizia si liniaritatea conversiei(dar ai zis low cost).

[niq_ro]

Uite aici schema ftp://hosting.cpt.ro/craciun/conv f-u lm555.jpg

am descarcat poza, merci

Dar in opinia mea nu exceleaza in perfomante privind precizia si liniaritatea conversiei(dar ai zis low cost).

am zis low cost, dar cred ca mai astept un pic sa vad si variante mai performante

[Craciun]

Vezi pe net datasheetul ptr RC4151 de la Fairchild si asta e cam ce ai nevoie (acum nu stiu ptreul!, dar e dedicat ptr ce vrei tu )

[Vizitator bogdanma]

Daca ai idei am eu LM2917-N8 vreo 200 buc

Descarca datasheet-ul si spor la treaba

Uite si link-ul: http://www.selectronic.fr/includes_selectronic/pdf/NS/LM2917_LM2937.pdf