Ultra low voltage voltage converter 1,5 volts. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Voltage converters, rectifiers, inverters
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Below is a diagram of an ultra-low-voltage self-oscillating voltage converter with just one transistor. The efficiency is somewhere around 80% and depends on the load current and can reach up to 94%.
From it you can power: 80% of radio microphones, LED backlight (works for a very long time), VLF, receivers, energy-dependent memory chips, can be used as a portable charger for mobile phones by purchasing 1 battery. An excellent device to make batteries DEATH.
Technical specifications
Supply voltage 1,5 volts.
The oscillator starts at a voltage of at least 390 millivolts and remains operational at a voltage of 200 millivolts and below!
Can be used to generate low frequency oscillations under harsh supply voltage conditions (e.g. from a single solar panel)!
You can try to change the transistor to GT402-4, GT703 GT705 OR THEM LIKE THE OTHERS WILL NOT SUIT!
If the converter refuses to work, then it is necessary to change the ends of the secondary winding!
C1 mainly affects the efficiency.
The converter transformer is a ferrite ring with a permeability of about 2000HH, the inner diameter is 8mm, the rest is 5mm. 10 turns of 1.3 mm wire and 53 turns of 0.5 mm wire.
Transformer winding method: first, the first winding is wound turn to turn. Then we wind the secondary winding in the same way until the entire ring is filled.
Author: neitronnaia burya, dendroiduz [dog] mail.ru; Publication: cxem.net
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