Anode Control Circuit - Arduino nixie v41 Operating Instructions Manual

Anode Control Circuit:

Parts List:
S24 SOCKET 24
OK1 EL817
OK2 EL817
OK3 EL817
OK4 EL817
OK5 EL817
OK6 EL817
R1 1k
R2 1k
R3 1k
R12 1k
R13 1k
R14 1k
R4 2.7k
R5 2.7k
R6 2.7k
R15 2.7k
R16 2.7k
R17 2.7k
SV3 CONN_ANODE
This circuit controls passing the HV to the anodes of the tubes. The micro-controller multiplexes the
anodes by turning each of them on it turn for a very short period of time. The software controls the rate of
the multiplexing and the order in which the anodes are activated.
Notes:
The Opto-Isolators fit into the 24 pin socket snugly. Be careful to put them in the right way round.
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The dot denotes pin 1 and should be on the side closest to the micro-controller. All 6 should fit
perfectly into the 24 pin socket.
The Opto-Isolators are socketed because they are sensitive to heat and are easily destroyed if you
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apply too much heat to them. Putting them in a socket means that we don't run the risk of
destroying them while soldering.
If you receive the connector header as a single strip, break off 6 pins for SV3.
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