Search results

Search Forums New Posts
  1. Martaine2005

    No access?

    I can’t find it, so perhaps he deleted it?. Try looking for the thread again.
  2. Martaine2005

    Introduction

    Hi David and welcome. You can click on the Forums tab. It will open a list of different options. ie, general, LED, microcontroller etc. Then choose the appropriate section. Martin
  3. Martaine2005

    Backyard DIY Auto Repair and Backyard DIY Electronics Repair

    Then we are still talking about an impossible answer. You’re going round in circles. One machinist may take a year to adapt and understand every tool. Another may take 3 years. One may be able to diagnose a faulty £2.50 spark plug while the technician’ diagnoses a faulty £300 coil pack. Your...
  4. Martaine2005

    Backyard DIY Auto Repair and Backyard DIY Electronics Repair

    A machinist is not a mechanic. They understand math and tolerance. An electronics hobbyist is not an electronics engineer. A part time/extra money repair cafe for all the above requires experience in all the above!. But above all, it requires a specific person that has those attributes. A doctor...
  5. Martaine2005

    Backyard DIY Auto Repair and Backyard DIY Electronics Repair

    The three examples you give are so far apart that the individual would have to choose a vocation. Let me try and break down your questions. But first, my experiences. I’ve never had any form of schooling for mechanics. But I can easily strip an engine and repair it. This is because I wanted to...
  6. Martaine2005

    Backyard DIY Auto Repair and Backyard DIY Electronics Repair

    This is only my personal opinion. Others may disagree. But I find electronics theory very hard but the practical side very easy. Your mileage may differ.
  7. Martaine2005

    Backyard DIY Auto Repair and Backyard DIY Electronics Repair

    I would have to answer yes.
  8. Martaine2005

    Backyard DIY Auto Repair and Backyard DIY Electronics Repair

    You’ve asked this question before and had replies. You cannot compare .your intellect with someone else’s. Your practical skill level maybe great but lack theory. Or you maybe great at theory and can’t do practical work. If you already have some understanding of electronics, car repair or home...
  9. Martaine2005

    PS-LX350H Sony Turntable no motor movement

    The LX 250 and the LX 310 are both 12 volts. 0.8A so anything above that should be fine. I’m not sure about the LX 350 though. According to another thread on here, it says “I have a Sony PS-LX350H TURNTABLE. It just stopped turning. the motor shaft doesn't move. I opened it up, checked for 6...
  10. Martaine2005

    Pioneer Spec 4 outputs

    Very difficult to say without seeing the circuit. Are the required voltages present?
  11. Martaine2005

    Pioneer Spec 4 outputs

    Most of the time, it’s not necessary to power it up. If a short was present with the transistors in and no short with them removed, it’s fairly safe to replace them and power it up. I always use current limiting bulb (dim bulb tester) to double check on first power up.
  12. Martaine2005

    How to SafeGuard against EMP/High Frequency Attacks, Forced System Reset and Force System Failure

    You seem to have covered all the bases, however, you omitted the all important Flux Capacitor and a personal tin foil hat.
  13. Martaine2005

    Schematic Help

    @SparkyCal The diagram below shows PIN numbers vs inputs and outputs. It does not follow as one would expect. Output 0 = pin 3 Output 1 = pin 2 etc.
  14. Martaine2005

    Schematic Help

    That R1 along with the other half of the schematic should have been cropped out. My mistake. My point was simply to show where to place the diodes. I use series resistors for each LED.
  15. Martaine2005

    Schematic Help

    Use diodes like this example.
  16. Martaine2005

    Replacement LR44 Battery Holder with Switch for LEDs

    You can easily repair that board. Or make your own with perf board. To repair, simply scrape the area to reveal fresh copper track and solder the battery holder back on. There are also ‘eyelets’ that you can push in the hole and solder to that. Many ways to repair the board.
  17. Martaine2005

    Component acquisition for hobbyists?

    Nope!. I also buy through Amazon and eBay for bulk. But you can get caught with fake components. We ‘relatively’ youngsters compared to the field engineer of yester year will never catch up. My personal experience is that it’s a dyeing trade for real component repair. Even in the 80s, a board...
  18. Martaine2005

    Question about 18650 cells

    This completely depends on the topology of the charger. A universal multi charger will be different to a dedicated charger for a particular type of equipment. If you have a bench power supply, set it for 4.8V @ 0.8A for 20 minutes. DO NOT leave it unattended. The lithium cell could vent. After...
  19. Martaine2005

    Question about 18650 cells

    3.3V should be a healthy LOW voltage. A cut off voltage is typically 2.5V to 3V. Some single cells have a BMS under the heat shrink but not all. So you might be dealing with two BMS. Now, if you like to live dangerously, you could try using a known good charged cell and using it to jump start...
  20. Martaine2005

    Identifying and replacing a small DC motor

    This is what I see by clicking the image.
Top