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  1. Old Steve

    What does this capacitor do?

    Still OT: It's amazing what a good night's sleep can do. ;)
  2. Old Steve

    Unusual 12V SLA Charger Circuit

    That's exactly what I thought. The top cap is charged by the supply, then the MOSFET pulls the C2/C1 junction high, pulling the top of C2 above the battery voltage and discharging the cap into the battery. Effectively a switched-capacitor system. I agree that the lower cap would keep some...
  3. Old Steve

    Good book for Electronics

    I can't point you to anything specific, but it might be worthwhile browsing through some of the stuff here:- http://www.freebookcentre.net/Electronics/Basic-Electronics-Books.html
  4. Old Steve

    What does this capacitor do?

    Yep, that would be a good reason to put a polyswitch in series with the battery lead.
  5. Old Steve

    TV commercial automatic muting device design ideas

    VideoReDo Plus doesn't do too bad a job, but certainly nowhere near 95% accuracy. I haven't used their 'Ad Detective' for quite a while, but from memory it was more like 75% to 80%. It definitely helped when manually editing afterwards, having markers to all of the ads, but only because I could...
  6. Old Steve

    Bad Capacitor?

    I missed that bit. No problem.
  7. Old Steve

    CROSA Pendulum clock..

    He's referring to a very old thread from 2011:- https://www.electronicspoint.com/threads/need-help-with-pendulum-clock.242141/ It appears to be a common problem. @pendulum 02 , can you give us more information? A clear photo of the relevant part of the clock might help, (the separate circuit...
  8. Old Steve

    What does this capacitor do?

    I agree. It looks very similar to these:- http://hitano.manufacturer.globalsources.com/si/6008800251343/pdtl/Resettable-fuse/1046375919/Resettable-Fuse.htm
  9. Old Steve

    TV commercial automatic muting device design ideas

    Yep, I figured there'd be a similar thing for live TV. You'll have to think of something else to invent. :D
  10. Old Steve

    LP2950 Indecision - How would you do it?

    I tested this circuit this afternoon. I only tested the 'B' version and didn't bother with the 'A'. I had a 100uF electro cap on the input, and 10uF tant caps across the 47 ohm resistor and from output to ground. From an oscillations point-of-view, it's fine, with or without a cap across the...
  11. Old Steve

    TV commercial automatic muting device design ideas

    It only works on recordings, in *.mpg format, but I'm sure that similar technology could be applied to live TV. They provide a free trial of the software, too. Here's a link to their site:- http://www.videoredo.com/en/index.htm
  12. Old Steve

    TV commercial automatic muting device design ideas

    It already exists. I have software called VideoReDo Plus, which captures ads in a TV recording and automatically marks them for removal. It's a bit hit-and-miss though, so I do it manually. It detects the black frame at the beginning and end of ads, and has adjustable sensitivity. Still triggers...
  13. Old Steve

    Op Amp circuit

    @balram , I chose not to reply again in the other thread. It's a hijacking. So I guess you're effectively designing an operational transconductance amplifier chip for simulation. Designing one to compare with a commercial one is beyond my ability, but perhaps reading some of the results from...
  14. Old Steve

    Footprint - Relay and button on Altium Designer

    Childhood??? That's a current pic of me. :D Edit: Oops, you did say 'second', so yep.
  15. Old Steve

    Arduino vs raw PIC, Atmel etc

    Thanks for that link. Interesting to read the history. And not just the 'Processing' IDE is written in Java. The whole 'Processing' language is Java-based, as I've learned. Much like the Arduino language is C/C++-based. I had to get some help from the Processing forums in writing a bargraph...
  16. Old Steve

    Footprint - Relay and button on Altium Designer

    You'll be extremely lucky to get the footprint of the relay, and you haven't even mentioned dimensions or part number for the 4-pin pushbutton, so you have no chance there. Perhaps you should quickly read up on creating component footprints in Altium Studio in the manual. It can't be that hard...
  17. Old Steve

    Voltage Issue with Dual L298 ICs wired to Raspberry Pi

    Hi Steve, I'm with Adam, I'm afraid. I don't think that type of board is very suitable either. That copper tape is a recipe for disaster, too. I'd also recommend Veroboard. Besides other considerations, it's better to work with and the tracks won't lift off the board while soldering, as I can...
  18. Old Steve

    LP2950 Indecision - How would you do it?

    I will. My headset was due today, but didn't turn up, so tomorrow I guess. Most of the similar hacks that I've seen have used a micro in the headset, but I don't see the need, since the TGAM1 outputs serial data at 9600 baud anyway. I already have everything else ready to go. I want to do motor...
  19. Old Steve

    LP2950 Indecision - How would you do it?

    Yep, I usually do put a diode backwards across the regulator, Adam, I just didn't worry on that diagram. After AK's response, I pretty much made up my mind to go with B, but I still haven't had a chance to put it together and test it with and without the capacitor across the 47 ohm resistor...
  20. Old Steve

    Bad Capacitor?

    How did you go with this, Dave? Get it sorted out? I've been wondering if that was a crack around that pin. It's always good to give this sort of topic closure, for the benefit of those who are following.
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