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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by niq_ro

  1. niq_ro

    LEDs for vehicle?

    for cars, you must calculate 2 cases, minim voltage (12,6V) and maximum voltage (14,5V), curent max. 20mA (minim recomandated is 7mA) and tension at LED's depend by..colour - red: 2V - yellow/orange: 2,2V - green: 3,3V - white/blue: 3,5 some example with group of LEDs for use at cars can...
  2. niq_ro

    Potentiometer link to linear actuator

    read atashed document... in this are some usefull links (is in roumanian language, but.. are schematics)
  3. niq_ro

    help!!!

    at http://english.cxem.net/home/home63.php ( http://english.cxem.net/home/home63-1.gif ) is a shematic for "British Ploce car Alarm"... you can use my pbc for this...
  4. niq_ro

    Charger for 2-3Ah 12v SLA

    for a simple charger with: - LM317 see **broken link removed** - LM7805 see **broken link removed** for a "smart" charger with LM317 see **broken link removed**
  5. niq_ro

    i need ideas for building a speedmeter ....

    You can use a LM2917 (2907 - see http://www.niqro.lx.ro/LM2907.htm ) and a digital meter (with a 7106) or.. use a frequencemeter but with a different frequncy at base time (see **broken link removed** )
  6. niq_ro

    7 seg counter+pulsating circuit

    4026 is made in CMOS technology and must connect every used inputs (clock in, reset, etc) at ground (GND/-) or + thru resistors (100..470k) and unused inputs directly at GND or V+ (see https://www.electro-tech-online.com/custompdfs/2006/01/cd4026b.pdf ) PS: for each 4026 outputs (a,b,c, d, e...
  7. niq_ro

    schematic for Pioneer SA-510

    can you scan and e-mail me? [email protected] thx
  8. niq_ro

    ST 1300 datasheet

    :oops: :oops: :oops: sorry, is ST13007 and it is use in compuer power supply https://www.st.com/stonline/books/pdf/docs/5263.pdf
  9. niq_ro

    9V battery charger

    look a **broken link removed** is simple :wink: with a LM7805, a red LED and a resistor current charge is recomadated to be 18mA and time of charge 10-12 hours
  10. niq_ro

    ST 1300 datasheet

    I have few transistor ST 1300 but I don't know their characteristical... :(
  11. niq_ro

    Touch switch

    look at **broken link removed** are there a few senzor
  12. niq_ro

    NiMH Recharger

    look at **broken link removed** :wink:
  13. niq_ro

    FM receiver

    You can use IC TDA7000 made bay Philips; at www.semiconductors.philips.com/pip/TDA7000.html can see the datasheet
  14. niq_ro

    door lock schematic

    finally I find a good schematic for a door lock :shock: **broken link removed** and is named "inchidere centralizata" :wink: and at **broken link removed** is a schematic for conecting a alarm with incorporated central door lock and a external (original) central door locking
  15. niq_ro

    Beat LED

    any NPN transistor, eg: BC107, 2N2222, BD135, 137, 139
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