The number 1, for example, needs only two segments to light up, and so for the row representing 1, there are only two diodes, i.e. two dabs of electrolyte where the rows overlap the columns for ...

You can build a simple low-current voltage regulator from a resistor and a Zener diode. This type of regulator is often adequate for noncritical applications such as internal bias voltages. The ...

Discrete Driver Circuit Many laser diode manufacturers supply application notes which suggest control circuits to drive their laser diodes. As an example, Figure 1 shows a typical discrete APC 1 laser ...