## Board layout goes a lot faster with help from Mho and Hans – Circuit Playground

Board layout goes a lot faster with help from Mho and Hans

Mho has a laid back, passive personality. He likes to do as little work as possible, and prefers to simply let the world happen around him. Mho is kind of a hippy, and is very quiet and gentle. He is best friends with Ruby, the red LED, who shares his idealism, though he’s often reluctant to go off with her on her adventures because he thinks they will probably end up in trouble. Mho has sort of a nasally, hippie voice (California accent, but not a surfer). His catch phrase is “no worries, man. it’s all easy.”

Resistors are passive electrical devices that resist the flow of an electrical current. The voltage across and the current through a resistor are related by Ohm’s law. Unlike capacitors and inductors, the resistance of a resistor does not change with its frequency. The amount a resistor constricts the flow of a current is its resistance. ‘Thru-hole’ resistors are labeled by their resistance using a color band scheme.

Get Mho!

Hans is the ‘old man’ of the group. He tends to be nervous and is often indecisive. Hans frequently changes his mind, and is a little fidgety (he oscillates) when he’s not moving around. He is very meticulous and precise in other ways; Hans does not like to compromise, preferring to be in a steady state until a dramatic change is called for. Hans speaks with the voice of a kindly old man with a Swiss-German accent, though his voice can become more nasally when he’s upset or feels strongly about something. His catchphrase is “maybe so, but perhaps not.”

The 555 timer IC was designed by Hans Camenzind in 1971. It consists of two threshold triggers, an RS flip-flop, and an output buffer. The 555 provides an easy, reliable way to create rectangular waveforms of adjustable pulse width and frequency by using different external component values.

Get Hans!

Just watch out for the blue smoke monster

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