The answers to Circuit Cellar’s September electronics engineering crossword puzzle are now available. 
Across
3. ZUSE—German engineer inventor and engineer (1910–1995) who is credited with creating the Z3, a program-controlled Turing-complete computer
5. ROOTMEANSQUARE—Alternating voltage/current with the exact same energy content as the same value of direct current; a.k.a., quadric mean [three words]
10. BLOB—Stores binary data; synonym: drop
13. KLYSTRON—A specialized linear-beam vacuum tube
16. ELECTROMAGNET—English physicist and inventor William Sturgeon (1783-1850) is credited with using electric current to develop the first one of these objects in 1825
17. LACOSTE—Circuit Cellar columnist who frequently writes about frequency
18. SMARTSWITCH—An energy-saving device that was the topic of Fergus Dixon’s article (Circuit Cellar, 263 2012) [two words]
19. PICOAMMETER—Measures low current
Down
1. PUBLICKEYCRYPTOGRAPHY—Decodes using two pieces of information, one public and one private [three words]
2. COMPRESSIONDRIVER—A loudspeaker that achieves high efficiencies by using a consolidating technique [two words]
4. SPIDER—The flexible collar that helps keep a voice coil magnetically centered
6. MICROPOWERIMPULSERADAR—A pocket-sized radar that runs off AA batteries and is often used as a basic motion sensor for security applications [three words]
7. ALPHATESTING—Check performed by an independent team on a system installed at a place other than the targeted customer’s site [two words]
8. ATOMICOPERATION—An action that is non-interruptible by any other one and never presents partial results to an outside observer [two words]
9. EMBEDDED—As Circuit Cellar prepares to celebrate its 25th anniversary, a past, present, and future key theme of the magazine centers on this type of technology
11. SIGNALPROCESSING—Involves measuring physical quantities with time and spatial variances [two words]
12. FLOWCHARTING—Jeff Bachiochi describes how to use this technique to write code in this issue
14. CONVOLUTION—Mark Csele’s article, “DSP-Based Color Organ” (Circuit Cellar, 249 2012), used this technique to create high-performance filters
15. MULTIPLEXER—A device that combines input signals, shares a single transmission channel, and enables data compression
Circuit Cellar is the only publication that provides intensive, exploratory articles about hardware and software methods for embedded-control systems.
