For regulating a solar panel’s output, there are several possible ways. A linear series regulator can be used, but has the disadvantage of causing some voltage drop and having some internal power consumption at times when the sun is weak and the load is heavy. It’s much better to use a shunt regulator, which is [...]
Basically a high-efficiency dimmer, but can also be used as a flasher. In dimmer mode, the LM358 (dual op-amp) is wired to send pulses at a constant frequency. By adjusting the width of these pulses, brightness of the bulb is controlled. In flasher mode, the same potentiometer is used to control the frequency - from [...]
Use this circuit as a low cost alternative to a commercial DAC. It is important that the latch be a CMOS device, so that the outputs drive to Vcc when they are high. (TTL devices only drive to 2.4 volts or so). I have shown the ‘573 latch rather than the ‘373 which can also [...]
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