Spark and Load

circuit pair — Spark is the source (voltage, current generation, battery / generator). Load is the work-being-done (the device that consumes the current — bulb, motor, speaker). Together they teach that no circuit works without both giver and receiver.

A story read by Spark and Load

Press play to listen along. The line being read lights up as you go.

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01 Opening
Spark and Load beat 1 of 5

- "whirring" - "BEEP" - "BOOP" - "BEEP-BOOP-BOOP" - "BEEP-BOOP" - "ZAP" - "BUZZ" - "HUM" - "ON" - "OFF" gate-allow-text-pattern: '^(-?[A-Z]{1,5}(-[A-Z]{1,5})*|[a-z]{4,10}|[0-9]{1,3}V?|[0-9]{1,3}A)$'

02 Spark and Load
Spark and Load beat 2 of 5

On the big, clean workbench of the Circuitforge, two friends sat on opposite sides of a wide, green mat. On the left sat Spark, a small, cheerful box with a big, friendly dial. A low, happy hum came from inside, and a warm light pulsed gently from a little window on its front. Spark was full of fizz, pop, and go-power.

On the right sat Load. Load wasn't just one thing, but a whole team of quiet gadgets. There was a little glass bulb with a tiny wire asleep inside it, a small motor with a bright yellow propeller, and a round speaker with a neat mesh screen. They were all silent and still, waiting patiently.

"Feeling the buzz today, Load!" Spark called out. Its light pulsed a little faster. "I've got the zoomies, the tingles, the big-time VROOM! Ready to make something happen!"

The little bulb on Load’s side wiggled just a bit. The motor’s propeller gave a hopeful twitch. "We hear you, Spark," Load’s voice replied, a calm sound that seemed to come from all the gadgets at once. "We are ready, too. We are ready to shine, and spin, and sing. But we are... well, we're just sitting here."

03 Spark and Load
Spark and Load beat 3 of 5

Spark focused all its energy. Inside its box, tiny bits of lightning-fast cheer whizzed around with nowhere to go. Spark turned its big dial up a little, from a friendly 3 to an excited 5. The hum grew louder, the light brighter. "I'll just... I'll just send some energy your way!" Spark declared.

With a great effort, Spark pushed. A tiny, glittering speck of light shot out from its connector, flew a few inches through the air, and then vanished with a sad little pfft. It was like trying to throw a whisper across a busy room. It just got lost.

"Did you get it? Did you get it?" Spark asked, sounding a little less sure of itself.

From across the bench, Load was as still and dark as before. "We saw it!" Load answered kindly. "It was a very nice spark. Very bright. But it didn't quite... arrive."

04 Spark and Load
Spark and Load beat 4 of 5

Over on the other side, Load waited. The little bulb dreamed of glowing, of pushing back the shadows on the workbench. It wanted to be a tiny sun, even for just a moment. The motor with the yellow propeller longed to feel the whir and spin, to send a tiny breeze across the green mat. The speaker practiced a happy little tune in its head, a series of beeps and boops it was dying to share.

"It is a strange feeling," the speaker-part of Load murmured to the others. "I know exactly what to do. I have a song all ready."

"I know how to spin," the motor added. "Clockwise, counter-clockwise, fast, slow. I just need the... the push."

"And I know how to shine," sighed the little bulb. "It’s the one thing I was made for."

Load sat there, a collection of perfect plans and wonderful ideas with no way to bring them to life. They had all the how, but none of the get-up-and-go. Being full of purpose with no power felt like being a kite on a day with no wind. You could be the best kite in the world, but you were still just stuck on the ground.

"This isn't working," Spark said, its light pulsing in a worried rhythm. "I have all this energy, and you have all those amazing jobs to do."

05 Closing
Spark and Load beat 5 of 5

"If you clipped one end to me," Spark buzzed, its excitement returning, "and the other end to... say... the lightbulb..."

"Then the path would be open," Load finished, a hopeful tone in its collective voice. "Your go-power would have a road to travel on, straight to us."

The idea hung in the air, full of possibility. It was a little scary. What would it feel like? But sitting apart wasn't working at all. They had to try. One shiny clip on the red wire slowly reached over and gently clamped onto Spark’s connector. The other clip hovered over the little bulb.

"Ready?" Spark hummed.

The CircuitForge ensemble

Spark and Load is part of CircuitForge's distributed-narrative cast. Each character embodies a different curricular primitive; together they teach the full subject.