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  1. bertus

    Hello, Welcome! (Introduce yourself)

    Hello, @Delta Prime , Welcome over here. I have seen you more often at All About Circuits , wich is the partner site of this site. Hope you also like it over here. Bertus
  2. bertus

    Video over laser

    Hello, You might find some info on transmitting/receiving data by light in the Ronja project: http://ronja.twibright.com/ Bertus
  3. bertus

    25 PF Capacitor sub

    Hello, As @kpatz said, the capacitor is used to avoid oscillation of the opamp. Read this article for more info: https://e2e.ti.com/blogs_/archives/b/thesignal/archive/2012/05/30/taming-the-oscillating-op-amp Bertus
  4. bertus

    Need schematic for Tenma 72-585 signal generator

    Hello, Have a look at the attached PDF. Page 9 shows a schematic. There are however no details on the coils. Bertus
  5. bertus

    25 PF Capacitor sub

    Hello, Show the schematic. It can be the value is not that critical. If you really want 25 PF, take the 10 and 15 PF capacitors from kit 3 in parallel. Bertus
  6. bertus

    Book Reviews

    Hello, An other book to learn the electronics basics is Electronics from Wikibooks: https://archive.org/download/electronicswikibooks/Electronics-Wikibooks.pdf Bertus
  7. bertus

    Marine Beacon schematics for project

    Hello, A SOS on morse is : dot dot dot dash dash dash dot dot dot A dot is 1 time unit. A dash is 3 time units. The time between dots is also 1 time unit. The time between two signs is 3 time units. Bertus
  8. bertus

    Connecting TV to PC with HDMI, fried TV mainboards...

    Hello, The new TV I have has also no grounded mains connector. It uses a mains cord like this: These are quite common in the region I live. Bertus
  9. bertus

    Tacx T2240 turbo trainer - blown resistor

    Hello, @Meaddog , there are special tweezer style soldering irons to use with SMD resistors and capacitors. Here is an example: https://www.circuitspecialists.com/Tweezer-Style-Soldering-Iron-For-SMD.html It shows the USA version, but there will also be EU versions around. Bertus
  10. bertus

    CRT TV screen problem.

    Hello, You might also find some tips for repairing on SAM's page: http://www.repairfaq.org/sam/tvfaq.htm Bertus
  11. bertus

    tinning

    Hello, Perhaps the attached PDF's will help. Bertus
  12. bertus

    Schematic that doesn't specify components ?

    Hello, The leds in the footswitch assembly are probably red leds. Read this blog for more info: https://www.megadix.it/blog/diy-fender-princeton-dsp-65-footswitch/ Bertus
  13. bertus

    Comedy Thread

  14. bertus

    Schematic that doesn't specify components ?

    Hello, From page 6 of the given manual: From the footnotes: Bertus
  15. bertus

    More current to stepper motor

    Hello, @01sporty , The L298 is not going to work. It can deliver 2 A per channel, but total device current is 4 A. Bertus
  16. bertus

    Help identifying SMD diode

    Hello, There are several diodes with the B code: https://smd.yooneed.one/code4200.html You will need the packagename to narrow the search. Bertus
  17. bertus

    Resistor codes

    Hello, As @Martaine2005 said, have a list of possible values ready. The 220 Ohms does not exist in E48 , E96 and E192. See the attached PDF for the values. Bertus
  18. bertus

    Resistor codes

    Hello, I would say that that resistor is 10k 2%. Often the tolerance band is wider as the rest, or the distance between the tolerance band and the rest is wider. Bertus
  19. bertus

    Unusual Touchscreen Monitor Power Supply - Never saw before

    Hello, Wich pins are occupied in the connector? It looks a bit like the power supply in the link: https://miltonwares.com/wares/artesyn-lp68783795-ad2412n3l1-12v-ac-power-supply-adaptor-100-220v-skbawa-000/ Also take a look at the shape of the connector. There are some corners that are in...
  20. bertus

    Resistor codes

    Hello, Did you see this picture on the page I in the thread I linked to: Bertus
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