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  1. HarryA1

    LC tank circuit with HV driver

    Your first two jpegs (FSR and NST) are not showing up?
  2. HarryA1

    Question storage elecronic devices and aluminum electrolytic capacitor

    see: https://antiqueradios.com/forums/viewtopic.php?t=444008 https://www.electro-tech-online.com/threads/question-capacitors-storage.167038/
  3. HarryA1

    Who is caching electronics-lab?

    It is back. On first loading this site I see: members 94524 and 1 reply for this topic. On refreshing see members 94526 and replies 2.
  4. HarryA1

    Who is caching electronics-lab?

    That  works . I see the number of members at 94,524 before and after refreshing at the browser.
  5. HarryA1

    Who is caching electronics-lab?

    I noticed that Firefox was caching this site. For example coming here today I see member a count of 94,515. If I force the browster to refresh I get a count of 94,520.  I have dorked around with the Firefox browser to find how or where it was caching the site; to no avail. I tried Opera and Edge...
  6. HarryA1

    How do I choose the right MOSFET for a high-efficiency inverter circuit?

    Conduction loss is larges loss in a MOSFET, it occurs when the MOSFET is in the 'on' state and current flows through its channel. It's calculated using the formula: P = Current^2 × Rds. Also switching losses occur during switch the transistor on and off. Look it this calculator and you will...
  7. HarryA1

    USB-Microphone

    How do you transfer data from the buffer to a USB interface?
  8. HarryA1

    help me to install aux output/line out

    Can you pick a signal off the speakers? Perhaps use a three wire connector-jack that disconnects the speakers when you plug it in. The grounds at the speakers are required by the simulator.
  9. HarryA1

    Superimpose Current Into Another Circuit Line?

    You would need to supply a schematic for anyone to help you. What is "2008"?
  10. HarryA1

    5.1 Optical Input to I²C Conversion for Audio System

    I2C is for data transmission not for audio.
  11. HarryA1

    ebike charger

  12. HarryA1

    Question HDDs + case usb

    One would expect the heads to be parked (off the platters) if not actively in use. If it still works then it must be okay?
  13. HarryA1

    Question electrolytic capacitors in devices

    see: electrolytic-capacitors-in-electronic-devices
  14. HarryA1

    Two Spark Gaps In Series?

     Given two gaps in series both gaps would have to fire simultaneously. Say the narrow gap fired first; where would the electrons come from? What do you mean by not regular needed milliseconds? I built  a CDI for a chainsaw. At 1800 rpm it worked fine, at 3600 rpm it would blow the 10 ampere...
  15. HarryA1

    I want to build an electronic circuit

     The TLV9002 output at 25C is 67.8 mv; to get 4v one would need an amplifier gain of 58.99 At 50C the output is 3.27v ; to get 12 volts one would a gain of 3.66 I think a log amplifier would work here. "Log amps are non-linear, analog amplifiers that produce an output that is the logarithm of...
  16. HarryA1

    Can ignition coil voltage be increased? How!

    Perhaps you will something useful from these two circuits; although somewhat dated. If you are interested I will try to redo the second later.
  17. HarryA1

    M88CS6001 datasheet

    https://www.alldatasheet.com/view.jsp?Searchword=M88CS8001-S000
  18. HarryA1

    Bluetooth activated relay

    There is some good information on using Arduino boards and Bluetooth in the Arduino Cookbook. It can be download free from; Cookbook  One can use a Bluetooth enabled  PC for testing I believe. The pairing address from the table saw would be needed I gather. The Arduino board to the vacuum...
  19. HarryA1

    Capacitor Charging with HV Pulses

    I will message you a temp email address. You could  try  sending me an email with your  LTspice  .asc file as an attachment. I could play with it. If I can figure how to do messaging. 
  20. HarryA1

    Capacitor Charging with HV Pulses

    Try this. On your schematic window click on a blank area. Select Edit Simulation CMD then in the popup dialog box select AC Analysis. Select Linear or Decade(?) . Then I used: 500, 30k, 50k. Next click on the signal symbol and set then AC voltage to some value.  On running the simulation I got a...
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