A simple sawtooth generator on a UJT transistor.
More details in our [VK Group](vk.com/hobbyelectronics) or on [YouTube channel](https://www.youtube.com/channel/UCLdTNOjun7iI2_GlNZORhcw).
PWM generator for test 1/4 bridge, half bridge and full bridge power circuits. 1 side PCB was disined for Iron technolodgy.
This circuits was accembled and work fine.
Note: 78L12 must be change on 7812 if use power > 18V
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