Search results

Search Forums New Posts
  1. Martaine2005

    A Stretch

    Very true, nothing is perfect, this is the real world. Might be a couple of millivolts off. But keeping it simple for me and the OP, it gives a general way of testing. Martin
  2. Martaine2005

    A Stretch

    There are a couple of ways to check the op amps on their own. Power them Vcc as normal. Connect inv and non inv to ground then check output. It should 0V. Leave inv at ground and put a voltage on non inv, say 5V, the output should now be 5V. This is a ‘follower’ or ‘buffer’. This should show...
  3. Martaine2005

    The Adventure Continues......

    @hevans1944 it seems like a mine field in the shops too with hundreds of foot pedal/switches. There is really only 6 or 7 different types. Vibrato, chorus, delay/echo, fuzz/distortion, phaze, EQ and compressor etc. They are all pretty much the same except for the high and low filtering, gain and...
  4. Martaine2005

    Ceiling Fan Capacitor Question

    Yes it will work just fine and much cheaper!. Martin
  5. Martaine2005

    12VDC Battery Backup Switch - Mini UPS DIY

    https://fubu.com.au/12v-battery-backup-lighting-solar-pcb-lighting-blackouts-sheds-homes-business/ It doesn’t say whether it switches back when power is restored. I imagine it would though. Martin
  6. Martaine2005

    Ceiling Fan Capacitor Question

    Actually, I think the Amazon one is 110v.
  7. Martaine2005

    Ceiling Fan Capacitor Question

    Are you sure it’s 4 wires?. I can find the the CBB61 with 5 wires no problem. Looking at the wiring, both REDs are in parallel anyway. So really a 4 wire. https://www.gladiatorlighting.com/cbb61-5-wire-4-8-6-6uf-microfarad-ceiling-fan-capacitor.html The Amazon one is the same but has 2 grey...
  8. Martaine2005

    Jumper Wires and Breadboards

    I also use solid core mainly on breadboard. Obviously you can’t always and Dupont male to male / male to female wires along with header pins come in handy too. It keeps the breadboard tidy without having wires hanging everywhere. Those hanging wires are not only antennas but are also a PITA...
  9. Martaine2005

    Stereo Receiver Right Channel Distortion.

    Would you kindly explain what the prroblem was and how you came to that conclusion before successfully repairing it?. Trying to help in ‘text’ version over the internet is hard enough, we don’t have the unit in front of us. It would be appreciated and could help somebody else in future with the...
  10. Martaine2005

    A Stretch

    I have a suggestion. Watch this video from EEvlog Martin
  11. Martaine2005

    A Stretch

    Have you connected pin 6 and 7 together?. Amp B inverting input and amp B output? Martin
  12. Martaine2005

    HDMI Cable EMI compliance performance

    Can you be more specific to the interference you are receiving?. What and how is the interference doing and affecting? Martin
  13. Martaine2005

    A Stretch

    Have you checked the voltages that @Audioguru pointed you to?. Stay with the breadboard. You can solder the circuit on pcb when you have it working. Also, what voltage have you got on the input of the opamp?. Martin
  14. Martaine2005

    FFC Cable

    https://www.google.co.uk/amp/s/uk.rs-online.com/mobile/amp/c/cables-wires/ribbon-flat-cable/ffc-cables/ RS have many types. The silver coating is more than likely shielding either for heat or RF. I don’t think there is a real reason for one side being longer other than where the cable bends, it...
  15. Martaine2005

    A Stretch

    Well spotted. Martin
  16. Martaine2005

    A Stretch

    That link provided by @bertus is great. Follow it, read it and understand it. When the circuit is complete and working, you can change cap values to see the differences. Use a good or new battery. Or use a bench supply. Don’t assume it’s not working straight away. Push components into the...
  17. Martaine2005

    A Stretch

    I get the same login page. Permission is required. Read my post in your other thread. But above all, follow the steps in the video. He starts very simply. Use the pause button and take screen shots. This is such a simple circuit, be methodical. Martin
  18. Martaine2005

    Radio Shack 61-1065 Digital Timer User Maual

    Well I never, how things change!. I used to solder through hole components with just my eyes. Now I need glasses and a magnifying glass.. SMD with an electronic microscope and screen. Half the things I want to repair, I can’t. It’s simple enough to replace a microcontroller but the firmware is...
  19. Martaine2005

    The Adventure Continues......

    That’s why I said the first circuit is easier for you. Take your time and follow @Harald Kapp s advice with his approach to wiring the breadboard. Start with your power rails. Then make sure each component is placed correctly. Be methodical and double check everything before applying power. I...
  20. Martaine2005

    Adding aux functionality to old boat radio

    Yes, as @dave9 kindly linked to the manual, your speakers are all colour coded indicating negatives are separate too unlike your existing unit. It’s still easy to use and connect your speakers and power to the new unit. Martin
Top