Flickering candle
A yellow LED that never sits still: two clocks running at once, and the brightness is their sum.
Spooky Shack
Seven Halloween circuits you can build on the spring-terminal board, and an October mission over the experiments they rest on. A candle that never sits still, eyes that blink the opposite way round, a tripwire that screams and a ghost that remembers you crossed the room. Every one of them runs on the real simulator.
Each card opens on the bench. Press Wire it for me and the board does itself. Turn on Night Shift first — the shop after closing, with only the parts carrying current lit, is the whole point.
Eyes in the bushes
Two red LEDs blinking the opposite way round: when one is lit the other is out, about three times every two seconds.
Lightning
A rattling burst of flashes for about three quarters of a second, then nothing for about the same, over and over.
Creaky door
Hold the button to wind it up. Let go and the tone groans downward for ten seconds, slower and slower, until the door is shut.
Tripwire scream
Keep a light on the cell and the shop is quiet. Break the beam — slide the light toward the moon, or cover the camera — and it screams.
Ghost in the wires
Slide ON to arm it. Something crosses the shadow once and the buzzer starts — and keeps going after whatever it was has gone. Only the slide shuts it up.
The theremin
Drag the light slider under the CdS cell (or turn on the camera and cover it) and the pitch changes.
Spooky Shack
The shop is shut, the lights are off, and something in the 200-in-1 is still running.
6 chapters, laid over experiments the shop already teaches: Two Lamps Taking Turns · The Wail · The Groan · The Tripwire · It Remembers You · The Candle's Own Clock
Spooky Shack returns in OctoberThe bench is open all year, and so are these circuits. Only the mission is seasonal.