Jelc.Builder

All Versions of Jelc.Builder

• 
  1.24(26)This is the latest versionLatest

  XAPK

  Oct 24, 20268.6 MBAndroid 7.0+What's New
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  What's new in the version 1.24

  Updated on Oct 24, 2026

  Two new windows in Settings:
  
  • Parts: a data sheet for each of the 87 parts, with the symbol shown large, the name of every pin and what it is for.
  • Models: a data sheet for the 129 circuits, with the drawing, how it works, what to measure and what to check if it fails. Plus a button to build it.
  
  The palette grows from 76 to 87 parts.
  
  And 14 circuits that did not do what their name promised were fixed.
  
  And the app now tells you when a new version is on Google Play.

• 
  1.22(24)

  XAPK

  Aug 25, 202615.3 MBAndroid 7.0+What's New
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  What's new in the version 1.22

  Updated on Aug 25, 2026

  Now in 13 languages: Japanese, Chinese and Urdu join in, with all 102 circuits and the help translated.
  
  The palette grows from 43 to 57 parts: push button, SPDT switch, photoresistor, NTC thermistor, speaker, electrolytic capacitor, Schottky, bridge rectifier, RGB LED, battery and Darlington.
  
  Plus 8 new signal generators.
  
  The values it picks are ones you can actually buy, and the worksheet prints a shopping list.
  
  Ask by goal: "a 30 second timer".

• 
  1.20(22)

  XAPK

  Aug 23, 202615.2 MBAndroid 7.0+What's New
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  What's new in the version 1.20

  Updated on Aug 23, 2026

  Now in 10 languages: Spanish, English, Portuguese, German, French, Italian, Polish, Russian, Turkish and Hindi — the whole app, including the 94 circuits with their descriptions, the help and the printable worksheet.
  
  Schematics read better: no wire runs over another component's pin any more, and the amplifier output is marked OUT.
  
  Plus several minor fixes.

• 
  1.18(20)

  XAPK

  Aug 21, 202615.2 MBAndroid 7.0+What's New
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  What's new in the version 1.18

  Updated on Aug 21, 2026

  Now in 10 languages: Spanish, English, Portuguese, German, French, Italian, Polish, Russian, Turkish and Hindi — the whole app, including the 94 circuits with their descriptions, the help and the printable worksheet.
  
  Schematics read better: no wire runs over another component's pin any more, and the amplifier output is marked OUT.
  
  Plus several minor fixes.