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  1. bertus

    Capacitive dropper circuit

    Hello, An other option is a second string of leds: Bertus
  2. bertus

    Project question

    Hello, Here is the essential part of the given image: The schematics do have the texts light and dark on them. You might be interested in this booklet by Forrest Mims: https://archive.org/details/Engineers_Mini-Notebook_Sensor_Projects_Forrest_Mims/mode/2up You can also find more light...
  3. bertus

    How to create an equation to solve for resistance in this circuit

    Hello, The internet archive has some books and other documents for the PIC's: https://archive.org/search.php?query=electronics%20pic&and[]=mediatype%3A%22texts%22&and[]=loans__status__status%3A%22-1%22 Bertus
  4. bertus

    CCTV CAMERA LINGO

    Hello, PAL is also interlaced: Phase Alternating Line (PAL) is a colour encoding system for analogue television used in broadcast television systems in most countries broadcasting at 625-line / 50 field (25 frame) per second (576i). It was one of three major analogue colour television...
  5. bertus

    Questions silicone gel in plastic and rubber, good ou bad?

    Hello, Depends on the gel quality. There are gels that contain acids that will attack the plastics and rubber. If you want to use such gel, look for an acid free type. Bertus
  6. bertus

    Oscilloscope Reticle Alumination Miniature Lamp Availability

    Hello, You might want to have a look at the following PDF for relpacement lamps available at Farnell or Newark: www.farnell.com/datasheets/1182711.pdf If you want the service manual of the scope, have a look here: https://bruce.edebris.com/manuals/philips/pm3335/ Bertus
  7. bertus

    Can you identify this part?

    Hello, I have taken out the section where you showed the part: As there are no markings visible, we can not say what the part should be. Bertus
  8. bertus

    Through hole Diode Identification

    Hello, The 1N914 or 1N4148 will likely do in the circuit. Bertus
  9. bertus

    Through hole Diode Identification

    Hello, It looks like the diodes are part of a switch matrix. I do not think that they are defective, as very low currents are normaly used in those switch matrixes. Bertus
  10. bertus

    Resistor Question

    Hello, An other piece of information is on this page: https://www.allaboutcircuits.com/textbook/reference/chpt-2/resistor-color-codes/ There you also see the different E-series and the tolerances. Bertus
  11. bertus

    Through hole Diode Identification

    Hello, It could be an 1N914: https://www.ebay.com/itm/Genuine-1N914-High-Speed-Switching-Diode-200mA-100V-x20-Arduino-AVR/131664061807?hash=item1ea7ca256f:g:69QAAOSw3ydV3SAM https://www.pedalhackerelectronics.com/ECG519-General-Purpose-Si-Diode-Matsushita-1N914-p/ecg519-20.htm Most times they...
  12. bertus

    Basic Electronic Tutors (Seattle)

    Hello, The third edition of "The art of electronics" can be downloaded from the internet archive as community texts: https://archive.org/details/the-art-of-electronics-3rd-ed-2015/mode/2up There are also a lot of books and other documents as opensource at the internet archive...
  13. bertus

    CCTV CAMERA LINGO

    Hello, PAL is used in Holland as standard for analog TV. The Phase Alternating Line system is more stable for the colors. When you use PAL, the monitor or recording system must also be PAL. The joke on NTSC is Never The Same Color...
  14. bertus

    Actuator control for my nuclear missile complex

    Hello, Looking at the datasheet, the needed current to operate is between 2 A (no load) and 9 A (full load). Are the actuators driven one at the time or are there situations where more actuators are driven at the same time? Bertus
  15. bertus

    Drive an heating element for an homemade oven.

    Hello, You might be interested in the discussion in this thread of pizzamaking.com: https://www.pizzamaking.com/forum/index.php?topic=44395.0 Bertus
  16. bertus

    Drive an heating element for an homemade oven.

    Hello, On wich group is the oven used? As the others say, the element is intended to be used with a fan. Bertus
  17. bertus

    Acer Aspire 4738 laptop intermittent shut off

    Hello, As you see, the Hiren's boot CD is good to have around. There are many tools on it to solve computer problems. I hope that all problems are solved. If you want to see if some linux is running on the laptop, you could try some of the many live cd's: https://livecdlist.com/ Bertus
  18. bertus

    How to connect piezo speakers to an amplifier

    Hello, Have a look at this: http://www.simonsdialogs.com/2015/12/ultrasonic-pest-chaser-final-design/ Bertus
  19. bertus

    How to connect piezo speakers to an amplifier

    Hello, Did you see the adjustable module at the site you linked: https://www.kemo-electronic.de/en/Animal-Repeller/Car/Modules/M094N-Marten-repeller.php Bertus
  20. bertus

    Drive an heating element for an homemade oven.

    Hello, This is the desciption on the given page: High Quality Compatible Fan Oven Element 1500W Have you noticed that the fan oven is not heating up as usual? Well, this could be due to a faulty fan oven element. This element is the circular element in the oven, and can fail if the internal...
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