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  1. bertus

    Do you know portable apps ?

    Hello, I came accross this site: https://portableapps.com/ How do you like to have all your favourite programs on a USB sick? Bertus
  2. bertus

    Quick n Dirty answer needed

    Hello, When you lower the value of the 100k the flash will go faster. Here is more info on the 555 circuits: Bertus
  3. bertus

    Quick n Dirty answer needed

    Hello, On the given page : Model: NE555P Package: DIP-8 Frequency: 500KHz of Voltage: 4.5V~16V You will need to power the 555 with the mentioned voltage. Bertus
  4. bertus

    Quick n Dirty answer needed

    Hello, What type of 555 are you using? A bipolair type will work between 4.5 and 16 Volts. Bertus
  5. bertus

    Quick n Dirty answer needed

    Hello, I do not see a connection to pin 1 (ground) of the 555: Looking further, the circuits seems to be a hysterestic 555 oscillator , as pin 7 is not used: (this is an example schematic). Bertus
  6. bertus

    COVID-19

    Hello, Thai elevator with pedas, no buttons to touch: Bertus
  7. bertus

    Cross reference lists

    Hello, Here I have a list of cross reference lists that I collected over the years. Bertus
  8. bertus

    welding pit

    Hello, The add for the wire is in italian, so I assume the TS is from itali. Google gives this for welding crucible ...
  9. bertus

    My electronics workshop

    Hello, The TS also started a thread on the AAC: https://forum.allaboutcircuits.com/threads/my-electronics-workshop.170096/ Over there other members also have shown their workshops. Bertus
  10. bertus

    Quick n Dirty answer needed

    Hello, An other page where you can find a lot of links and other information is the EDUCYPEDIA: http://educypedia.karadimov.info/electronics/electronicaopening.htm Each page has a lot of links for you. Bertus
  11. bertus

    Quick n Dirty answer needed

    Hello, The wiki gives an explanation on Vcc Vdd Vee and Vss: https://en.wikipedia.org/wiki/IC_power-supply_pin As for the questions, read my signature. Bertus
  12. bertus

    Comedy Thread

  13. bertus

    Power supply downgrade

    Hello, You could use some of these boards: https://www.amazon.ca/Converter-Circuit-Adjustable-Linear-Regulator/dp/B01FDD4J96/ref=sr_1_1?crid=1O2HX437FO153&keywords=lm317&qid=1590503425&s=electronics&sprefix=lm317%2Celectronics%2C228&sr=1-1 If that is even to difficult, perhaps a power adapter...
  14. bertus

    Battery charging question

    Hello, It looks like that the mentioned charger is to strong for your battery. Read the following pages of the battery academy about the battery and charging methods: https://batteryuniversity.com/index.php/learn/article/lead_based_batteries...
  15. bertus

    Battery charging question

    Hello, This one is likely special for a 7 Ah SLA battery: https://www.ebay.com/itm/Mighty-Max-12V-1Amp-SLA-Charger-Maintainer-for-Amstron-12V-7Ah-Battery/381542908637?hash=item58d5bac2dd:g:RbwAAOSwAKxdUY8R Bertus
  16. bertus

    Battery charging question

    Hello, I do not read french, but it looks like a SLA battery. Use a charger specialy made for SLA batteries, to avoid over pressure. Bertus
  17. bertus

    SPI Signal Overshoot (to WIFI chip)

    Hello, Do the signals look a bit like the ones on this stack exchange page: https://electronics.stackexchange.com/questions/459322/spi-signals-show-overshoot-and-ringing-does-that-affect-reliability Bertus
  18. bertus

    Power supply downgrade

    Hello, As @Harald Kapp said, a voltage regulator will do a better job as a resistor. You can use a LM7806 , a LM317 with some adustment resistors or a LD1117-adj with the adjustment resistors. Bertus
  19. bertus

    Quick n Dirty answer needed

    Hello, Here is a PDF with some more schematics. It also contains some tables for the values. Bertus
  20. bertus

    Quick n Dirty answer needed

    Hello, Did you already have a look at the thread I posted from the AAC forum? In there in section 12 there is a part on special effects with the 555 and some transistors to drive the leds. https://forum.allaboutcircuits.com/threads/leds-555s-flashers-and-light-chasers.19075/#post-117649 Bertus
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