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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.

amplifier

  1. A

    How to connect stereo (2 channel) signal to 4 channel analog inputs

    Hi Team, I'm using TAS5414C-Q1 IC for audio amplifier. It has 4 channel analog inputs. I'd like to interface 2 channels from a 3.5 mm jack to these 4 channel inputs. How do I achieve this. Should I parallel the inputs. Is the below pic right way to connect in this regard...
  2. A

    volume/output power control using a knob in TAS5424C-Q1

    Hi Folks, It seems that the gain in the IC TAS5424C-Q1 can be controlled using I2C protocol. But I'd like to keep it simple using a hardware (rotatory knob). Is it possible to control the volume and output power using hardware control such as a rotatory knob generally used in car head units...
  3. throbscottle

    NOS Transistor with brittle leads

    Happy Thursday everybody! I managed to get what is probably a genuine Toshiba 1996 2SA1302 with green epoxy, to repair a PA, and started bending it's leads to match the original which have a semi-circle bent into them, presumably to allow for thermal expansion. They creaked and crackled a bit...
  4. E

    Class D amplifier for arduino

    I was playing about with transistor amplifiers nd I built this class D amplifier intended for use with the arduino ( or any other microcontroller) https://siliconjunction.wordpress.com/2017/02/28/class-d-amplifier-for-the-arduino/ Thanks Matt!
  5. B

    need amplifier circuit for M831 Electronic YZC 131 5kg weighing weight scale pressure sensor load ce

    We need to convert load cell output(millivolt) to (4-20)milliamps to give input to the PLC. Is there any IC or circuit diagram to directly convert millivolt to milliamps?
  6. A

    An audio amplifier for beginners

    Hey guys I just uploaded my tutorial on how to build a simple audio amplifier using an LM386 chip. When using the maximum supply voltage it can reach a power output of roughly 1 watt. Hope you find it useful. Schematic <Mod edit: If you have something to share, please post it here. Do not...
  7. budget minded

    negative terminal corrosion AND now amp's distorting and cutting out with new speakers

    i have a system that consists of a 12 volt 18 amp hour battery, a planet audio BB1200.4 class D 4 channel amp, a JBL GT5-15 sub in free air, and a battery tender charger. at first, i was using proel flash 8p mini PA speakers as mains, but tonight, i hooked up a brand new pair of JBL Northridge...
  8. Z

    Sanyo Denki Amplifier

    Greetings, I have several Sanyo Denki Py2 amplifiers (with BL Super P5 motors) , but dont have the PY-PC Interface Software (PYIF ). If anyone has this software (Ver 1.3 or higher), please share.
  9. S

    Using MMIC RF chip

    Hi all, Having played around with my new DVBT dongle I kind of like the idea of decoding ADSB signals. This is all fine and well but since I am not that close to an airport I see limited traffic. So the next logical step would be to get a LNA between my antenna and dongle, the not so logical...
  10. budget minded

    12v bicycle trailer sound system details

    this isn't exactly an "automotive" etc. application, but it will be a 12 volt system, just lacking an alternator. there are a few issues i need to iron out though. it was originally supposed to be a 36v system, but that created a lot of problems eg. separate batteries for an EQ/crossover or...
  11. J

    H-Bridge Amp for 8Ω Speaker (PWM)

    I am using fairly robust D882 and B772 transistors in my design, so I am wondering if I still need 4 damper diodes to protect the transistors as shown below? (Leaving them out saves a little on space and cost.)
  12. Empusa

    Amplifier problem

    Hello! First of all, i don't have much electronic knowledge, but here it goes. I have a small stereo amplifier with two 3W/4ohm laptop speakers with usb source. When my friend asked me to see what's wrong with it, it was completely dead, which proved to be the audio cable. So i replaced the...
  13. R

    Amplify current to UV-LED

    I have a function generator (Escort EFG 2210) as a source to a UV-LED (LED255J ). The FG delivers about 7.5 Vrms and 30 mA pulse signal. The LED requires closer to 100 mA for optimal emission. The voltage is good enough. I have tried various amplifier circuits, but end up with less current than...
  14. S

    Kenwood aftermarket amplifier problem

    Hello everyone, I am new on the forum. I have a older kenwood kac-7251 2 channel amplifier. It still works great except one problem, it is causing a parasitic drain on my battery. Started about a month ago, I am a auto and diesel technician so I checked parasitic draw, pulled my amp fuse and...
  15. willypa

    Technics SU-VX700 main bord repair(help needed!)

    So, I got my hands on this old Technics amplifier but the left channel is all loud crackle even at min volume while the right channel is clean and functional on all speaker settings (A, B, A+B). I inspected the boards and found 4 components completely burnt out. so much so that it was impossible...

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