BRAND/COLLATERAL · REV 2.0 SYSTEM: CIRCUIT/ESSENTIALS · NODE/LUNDGREN-01
// BRAND · /collateral 06 PIECES · LOCKED

The brand on paper, in inboxes, on the box.

Six pieces of brand collateral built on the same engineer's-notebook tokens as the website: industrial yellow #F7B500 against a deep charcoal bench, Manrope for narrative type, JetBrains Mono for metadata and part numbers, and a strict 24-grid silkscreen.

Palette Typography Business cards Letterhead Email signature Kit box label
[ 01 ]

Palette

9 tokens · web + paper

Dark surfaces drive every screen; paper variants kick in on print. Industrial yellow is the only accent — used sparingly to draw the eye, never used decoratively.

Bench#0B0E12
Paper (dark)#14181D
Deep#080A0D
Industrial yellow#F7B500
Stock-in#6EE787
Technical gray#7C868E
Trace line#E8ECEF
Paper bg#F4F6F8
Signal lost#ff5c5c
[ 02 ]

Typography

Manrope · JetBrains Mono
// MANROPE · NARRATIVE
Real circuits.
The bench every tutorial is verified against.
Deep-sleep an ESP32-C3 to under 12µA.

Verified engineering reference for embedded systems. Every tutorial bench-tested against a logic analyzer, a power profiler, and an oscilloscope.

// JETBRAINS MONO · METADATA
// SECTION LABEL
[ 01 ] CHIP / IDX PLATE
11.8µA @ 3.3V
$ ce-notify subscribe_
CONFIG_ESP_BROWNOUT_DET=n
CONFIG_PM_ENABLE=y
CONFIG_FREERTOS_USE_TICKLESS_IDLE=y
[ 03 ]

Business cards

3.5 × 2 in · 2-sided

Front is a clean lockup with name + role; back becomes a quiet spec sheet. Both sides print in single-color black + an amber spot — no gradients, no varnish.

Circuit/Essentials

Joe Lundgren

Firmware engineer · Founder
circuitessentials.com REV 014
03a · Front · dark stockSOFT-TOUCH BLACK
Circuit/Essentials

Joe Lundgren

Firmware engineer · Founder
circuitessentials.com REV 014
03b · Front · paperUNCOATED 18PT
[ 04 ]

Letterhead

US Letter · 8.5 × 11 in
Circuit/Essentials
Bench-tested electronics tutorials
CIRCUITESSENTIALS.COM
joe@circuitessentials.com
+1 555 014 0114 · UTC-7
Adafruit Industries
Attn: Affiliate Program · 150 Varick St · New York, NY 10013
RE: Affiliate application — Circuit Essentials

Affiliate application — bench-tested editorial review.

Hi Adafruit,

I run Circuit Essentials, an electronics-education site with one rule: every tutorial is bench-tested before it's published — verified code, real scope measurements, and named gotchas. I'm writing to apply to the Adafruit affiliate program for the part links in my parts-list tables.

Happy to send a list of upcoming articles. Thanks for considering.

Joe Lundgren
Founder · Firmware engineer
BENCH-GROUNDED PAGE 1 / 1 · 2026.05.17 · SHA a91f4c2
04 · US Letter · live recipient template1-COLOR + AMBER SPOT
[ 05 ]

Kit box label

3 × 2 in · adhesive · 1-color amber
BENCH-TESTED · LOT 2026-05 SKU-014
ESP32-C3 deep-sleep starter kit
Module · TPS62840 buck · 2× AA holder · caps · programmer
11.8µA @ 3.3V · VERIFIED QC-PASS · SHA a91f4c2
05 · Kit label · adhesive paper1-COLOR + AMBER SPOT