Electronics Bank
The electronics workstation in one map — cabinets 1A-13B with their drawer contents and SMT tower slots inside.
One map for the whole electronics workstation: every box is a cabinet or drawer you can walk to, labelled with its code (rows 1–13, letters A–B, then the thin C–I drawers below), and the text inside says what's in it. The cabinets from 8 onwards hold the SMT towers, whose drawer codes (R/C/D/Q/U) are decoded in the value charts further down; drawers 5B and 6B hold the printed sensor and MCU boxes.

Finding things
Search the grid for a part name — heatshrink, 0805, Modules — and matching drawers light up with their coordinates. Full screen expands the whole bank; merged boxes mirror the physical bins, one box per drawer.
Empty slot, or the part you need isn't there? Hit Request a restock above the grid and pick the part (or "Something else…"); it lands in exco's ops dashboard queue. No account needed.
The 5B and 6B boxes — sensors and MCUs
Drawers 5B and 6B each hold three printed boxes side by side. The sensor box (1) is one tall unit that spans both drawers — 1aa faces 5B and 1ba faces 6B — printed with the same category list; the module and MCU boxes sit separately in each drawer. Click any box code below to highlight its drawer on the grid.
Where: box 1aa in drawer 5B, box 1ba in drawer 6B.
| Row | What goes here |
|---|---|
| Temp / Humidity | DHT11, DHT22, LM35, raw thermistors |
| Motion / PIR | HC-SR501 PIR sensors, passive IR motion sensors |
| Distance / Ultrasonic | HC-SR04 ultrasonic sensors, IR obstacle sensors |
| Light / LDR | Photoresistors (LDR), photodiodes, phototransistors |
| Color / IR | Color sensor ICs, IR receivers, IR emitters |
| Sound / Microphone | Microphone capsules, sound detection sensors |
| Magnetic / Touch | Hall effect sensors, reed switches, capacitive touch pads |
| IMU / Accelerometer | MPU6050, accelerometers, gyroscopes, magnetometers |
| Current / Voltage | ACS712, INA219, voltage sensor ICs |
| Gas / Air Quality | MQ-series gas sensors, air quality sensors |
| RTC / Timing | DS3231, DS1307, oscillator chips |
| Force / Flex | Force sensitive resistors (FSR), flex sensors |
| Water / Soil | Water level sensors, soil moisture sensors, rain sensors |
| Reserved | (left empty for future sensor expansion) |
Where: box 2ba in drawer 5B.
| Row | What goes here |
|---|---|
| Temp / Humidity Modules | DHT22 modules, SHT30, BME280, AM2320 (pre-soldered boards) |
| Motion / Distance Modules | HC-SR04 modules, TOF sensors (VL53L0X), PIR modules |
| IMU / Compass Modules | MPU6050 modules, MPU9250, HMC5883L, GY-521 boards |
| Light / Color Modules | TCS3200, TCS34725, BH1750, UV sensor modules |
| Gas / Air Quality Modules | MQ-2, MQ-3, MQ-7, CCS811, SGP30, air quality breakout boards |
| Current / Voltage Modules | ACS712 modules, INA219, INA226, voltage sensor boards |
| Sound / Audio Modules | MAX9814, MAX4466, sound detection modules, audio breakout boards |
| RTC / Timing Modules | DS3231, DS1307, PCF8523 modules with battery holders |
| Biometric / Specialty Modules | Heart rate (MAX30100), fingerprint, flex, force sensor modules |
| Other / Misc Sensors | Any remaining sensors or modules that don't fit the above |
Where: box 2bb in drawer 6B.
| Row | What goes here |
|---|---|
| Switches & Buttons | Tactile buttons, toggle switches, rotary encoders, DIP switches |
| Batteries | Li-Po batteries, 18650 cells, coin cells (CR2032), battery packs |
| Reserved | (left empty for future use) |
Where: box 3aa in drawer 5B.
| Row | What goes here |
|---|---|
| Arduino Nano / Mini | Arduino Nano, Arduino Pro Mini, Arduino Micro |
| ESP32 Mini / C3 | ESP32-C3 Mini, ESP32-S2 Mini, ESP8266 (D1 Mini) |
| Raspberry Pi Pico | Raspberry Pi Pico, Pico W, Pico 2 |
| Other Small MCUs | Teensy 4.0, STM32 Blue Pill, any other small-form boards |
| Reserved | (left empty for future use) |
Where: box 3bb in drawer 6B.
| Row | What goes here |
|---|---|
| Arduino Uno | Arduino Uno R3, Uno R4, Uno WiFi |
| Arduino Mega | Arduino Mega 2560, Mega 2560 Pro |
| Arduino Due / Zero | Arduino Due, Arduino Zero, Arduino Giga |
| ESP32 DevKit | ESP32 DevKitC, ESP32-WROOM, ESP32-WROVER |
| ESP8266 Boards | NodeMCU, Wemos D1 Mini (full size), ESP8266 Dev boards |
| STM32 Boards | STM32 Nucleo, STM32 Discovery, STM32 Black Pill |
| Raspberry Pi | Raspberry Pi 3, 4, 5 (full-size single-board computers) |
| FPGA / Specialty | FPGA boards, custom dev boards, other niche MCUs |
| Other Big MCUs | Any remaining larger microcontroller boards |
| Reserved | (left empty for future use) |
SMT Drawer Values
The SMT towers (cabinets 8 onwards on the grid above) are organised by component letter and drawer code — every code below links to the drawer that holds it on the grid. Resistor values follow the standard E-series: E24 (9.1 × each decade), with E12 and E6 subsets for the coarser drawers.
R1 — 1/4W & 1/6W or 1/8W THT R
| 1 | 1.2 | 1.5 | 1.8 | 2.2 |
| 2.7 | 3.3 | 3.9 | 4.7 | 5.6 |
| 6.8 | 8.2 | 10 | 11 | 12 |
| 13 | 15 | 16 | 18 | 20 |
| 22 | 24 | 27 | 30 | 33 |
| 36 | 39 | 43 | 47 | 51 |
R7 — 1206 1Ω-100Ω
| 1 | 1.1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.8 | 2 | |
| 2.2 | 2.4 | 2.7 | 3 | 3.3 | 3.6 | 3.9 | 4.3 | |
| 4.7 | 5.1 | 5.6 | 6.2 | 6.8 | 7.5 | 8.2 | 9.1 | |
| 10 | 11 | 12 | 13 | 15 | 16 | 18 | 20 | |
| 22 | 24 | 27 | 30 | 33 | 36 | 39 | 43 | |
| 47 | 51 | 56 | 62 | 68 | 75 | 82 | 91 | |
R8 | Content: | 1206 100Ω-10K | Label: | R8 | 1206 100Ω-9.1K | |||
| 100 | 110 | 120 | 130 | 150 | 160 | 180 | 200 | |
| 220 | 240 | 270 | 300 | 330 | 360 | 390 | 430 | |
| 470 | 510 | 560 | 620 | 680 | 750 | 820 | 910 |
R16 — 0805 1Ω-100Ω
| 1 | 1.1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.8 | 2 | |
| 2.2 | 2.4 | 2.7 | 3 | 3.3 | 3.6 | 3.9 | 4.3 | |
| 4.7 | 5.1 | 5.6 | 6.2 | 6.8 | 7.5 | 8.2 | 9.1 | |
| 10 | 11 | 12 | 13 | 15 | 16 | 18 | 20 | |
| 22 | 24 | 27 | 30 | 33 | 36 | 39 | 43 | |
| 47 | 51 | 56 | 62 | 68 | 75 | 82 | 91 | |
R17 | Content: | 0805 100Ω-10K | Label: | R17 | 0805 100Ω-9.1K | |||
| 100 | 110 | 120 | 130 | 150 | 160 | 180 | 200 | |
| 220 | 240 | 270 | 300 | 330 | 360 | 390 | 430 | |
| 470 | 510 | 560 | 620 | 680 | 750 | 820 | 910 |
R25 — 0603 1Ω-100Ω
| 1 | 1.1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.8 | 2 | |
| 2.2 | 2.4 | 2.7 | 3 | 3.3 | 3.6 | 3.9 | 4.3 | |
| 4.7 | 5.1 | 5.6 | 6.2 | 6.8 | 7.5 | 8.2 | 9.1 | |
| 10 | 11 | 12 | 13 | 15 | 16 | 18 | 20 | |
| 22 | 24 | 27 | 30 | 33 | 36 | 39 | 43 | |
| 47 | 51 | 56 | 62 | 68 | 75 | 82 | 91 | |
R26 | Content: | 0603 100Ω-10K | Label: | R26 | 0603 100Ω-9.1K | |||
| 100 | 110 | 120 | 130 | 150 | 160 | 180 | 200 | |
| 220 | 240 | 270 | 300 | 330 | 360 | 390 | 430 | |
| 470 | 510 | 560 | 620 | 680 | 750 | 820 | 910 |
R34 — 0402 1Ω-100Ω
| 1 | 1.1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.8 | 2 |
| 2.2 | 2.4 | 2.7 | 3 | 3.3 | 3.6 | 3.9 | 4.3 |
| 4.7 | 5.1 | 5.6 | 6.2 | 6.8 | 7.5 | 8.2 | 9.1 |
| 10 | 11 | 12 | 13 | 15 | 16 | 18 | 20 |
| 22 | 24 | 27 | 30 | 33 | 36 | 39 | 43 |
| 47 | 51 | 56 | 62 | 68 | 75 | 82 | 91 |
R35 | Content: | 0402 100Ω-10K | Label: | R35 | 0402 100Ω-9.1K | ||
| 100 | 110 | 120 | 130 | 150 | 160 | 180 | 200 |
| 220 | 240 | 270 | 300 | 330 | 360 | 390 | 430 |
| 470 | 510 | 560 | 620 | 680 | 750 | 820 | 910 |
C1 — THT Capacitors
| 10pF | 22pF | 33pF | 47pF | |
| 100pF | 220pF | 330pF | 470pF | |
| 1nF | 2.2nF | 3.3nF | 4.7nF | |
| 10nF | 22nF | 33nF | 47nF | |
| 100nF | 220nF | 330nF | 470nF | |
| 1uF | 2.2uF | 3.3uF | 4.7uF | 6.8uF |
| 10uF | 22uF | 33uF | 47uF | 68uF |
| 100uF | 220uF | 330uF | 470uF | 680uF |
| 1000uF | 2200uF | 3300uF | 4700uF | 6800uF |
C2 — 1206 1pF-8.2nF
| 1 | 1.2 | 1.5 | 1.8 | 2.2 | 2.7 | 3.3 | 3.9 | |
| 4.7 | 5.6 | 6.8 | 8.2 | 10 | 12 | 15 | 18 | |
| 22 | 27 | 33 | 39 | 47 | 56 | 68 | 82 | |
| 100 | 120 | 150 | 180 | 220 | 270 | 330 | 390 | |
| 470 | 560 | 680 | 820 | 1n | 1.2n | 1.5n | 1.8n | |
| 2.2n | 2.7n | 3.3n | 3.9n | 4.7n | 5.6n | 6.8n | 8.2n |
C15 — 0805 1pF-8.2nF
| 1 | 1.2 | 1.5 | 1.8 | 2.2 | 2.7 | 3.3 | 3.9 | |
| 4.7 | 5.6 | 6.8 | 8.2 | 10 | 12 | 15 | 18 | |
| 22 | 27 | 33 | 39 | 47 | 56 | 68 | 82 | |
| 100 | 120 | 150 | 180 | 220 | 270 | 330 | 390 | |
| 470 | 560 | 680 | 820 | 1n | 1.2n | 1.5n | 1.8n | |
| 2.2n | 2.7n | 3.3n | 3.9n | 4.7n | 5.6n | 6.8n | 8.2n |
C13 — 0603 1pF-8.2nF
| 1 | 1.2 | 1.5 | 1.8 | 2.2 | 2.7 | 3.3 | 3.9 | |
| 4.7 | 5.6 | 6.8 | 8.2 | 10 | 12 | 15 | 18 | |
| 22 | 27 | 33 | 39 | 47 | 56 | 68 | 82 | |
| 100 | 120 | 150 | 180 | 220 | 270 | 330 | 390 | |
| 470 | 560 | 680 | 820 | 1n | 1.2n | 1.5n | 1.8n | |
| 2.2n | 2.7n | 3.3n | 3.9n | 4.7n | 5.6n | 6.8n | 8.2n |
C11 — 0402 1pF-8.2nF
| 1 | 1.2 | 1.5 | 1.8 | 2.2 | 2.7 | 3.3 | 3.9 |
| 4.7 | 5.6 | 6.8 | 8.2 | 10 | 12 | 15 | 18 |
| 22 | 27 | 33 | 39 | 47 | 56 | 68 | 82 |
| 100 | 120 | 150 | 180 | 220 | 270 | 330 | 390 |
| 470 | 560 | 680 | 820 | 1n | 1.2n | 1.5n | 1.8n |
| 2.2n | 2.7n | 3.3n | 3.9n | 4.7n | 5.6n | 6.8n | 8.2n |
C3 — 1206 >10nF
| 10n | 12n | 15n | 18n | 22n | 27n | 33n | 39n | |
| 47n | 56n | 68n | 82n | 100n | 120n | 150n | 180n | |
| 220n | 270n | 330n | 390n | 470n | 560n | 680n | 820n | |
| 1u | ||||||||
| 10u |
C16 — 1206 >10nF
| 10n | 12n | 15n | 18n | 22n | 27n | 33n | 39n | |
| 47n | 56n | 68n | 82n | 100n | 120n | 150n | 180n | |
| 220n | 270n | 330n | 390n | 470n | 560n | 680n | 820n | |
| 1u | ||||||||
| 10u |
C14 — 0603 >10nF
| 10n | 12n | 15n | 18n | 22n | 27n | 33n | 39n | |
| 47n | 56n | 68n | 82n | 100n | 120n | 150n | 180n | |
| 220n | 270n | 330n | 390n | 470n | 560n | 680n | 820n | |
| 1u | ||||||||
| 10u |
C12 — 0402 >10nF
| 10n | 12n | 15n | 18n | 22n | 27n | 33n | 39n |
| 47n | 56n | 68n | 82n | 100n | 120n | 150n | 180n |
| 220n | 270n | 330n | 390n | 470n | 560n | 680n | 820n |
| 1u | |||||||
| 10u |
D1 — THT Diodes
| 1N4001 | |||
| 1N4148 | 1N5822 | ||
| 1N5824 | 1N4004 | ||
| 1N5404 | 1N4007 | ||
| 1N5408 | |||
| 1N4728 | |||
| 1N4733 | 1N4742 | ||
| 1N4751 | 6A10 | ||
| 10A10 | |||
| 1N5819 |
- | | | | | FR107 FR157 | FR207 FR307 | | |
D2 — THT F3/F5/F10 LEDs
| Red | Orange | Yellow | Green |
| Blue | |||
| Red | |||
| (clear) | Orange | ||
| (clear) | Yellow | ||
| (clear) | Lime | ||
| (clear) | |||
| Green | |||
| (clear) | Blue | ||
| (clear) | Magenta | ||
| (clear) | White | ||
| (clear) |
D3 — 0603 LEDs
D4 — 0805 LEDs
D5 — 1206 LEDs
D12 — SOD-123, SOD-323
D13 — SOD-123, SOD-323
D14 — SOD-123, SOD-323
D15 — SMA, SMB, SMC
U1 — 74xx Series ICs
| 74HC4072 | 74HC374 | |||||||
| 74HC541 | 74HC595 | 74HC574 | 74LS160 | 74HC164 | 74LS257 | 74LS283 | 74LS76 | 74LS92 |
| 74HC86 | 74LS90 | 74LS137 | 74HC147 | 74HC155 | 74HC194 | 74HC273 | 74HC390 | 74HC393 |
| 74HC00 | 74HC02 | 74HC04 | 74HC08 | 74HC14 | 74HC21 | 7HC27 | 74HC32 | 74HC47 |
U2 — 4000 Series ICs
| OP497 | AD767 | MCP3002 | DG308A |
U3 — Analogue ICs
| CD40102 | CD40103 | CD4007 | CD4012 | |||||
| CD4072 | CD4081 | CD4511 | CD4541 | |||||
| CD4001 | CD4002 | CD4040 | CD4047 | CD4051 | CD4053 | CD4069 | CD4070 | CD4071 |
| CD4011 | CD4013 | CD4016 | CD4017 | CD4018 | CD4020 | CD4026 | CD4028 | CD4029 |
U4 — Power ICs
| LM2577 | MBRB2545 | STPS745FP | STPS745G | ||
| LM7805 | LM317 | LM7812 | LM7824 | LM7809 | LM7818 |
U5 — Opto ICs
U9 — General ICs
U10 — General ICs
U11 — Power ICs
U12 — Power ICs
U13 — General ICs
U14 — General ICs
Drawer index
Every drawer with its contents, as a plain list — click a code to jump to the grid with that drawer highlighted.
| Drawer | Contents |
|---|---|
1A | Storage |
1B | 3D printing storage · Storage |
2A | Storage |
2B | Connectors |
2D | Terminals, sockets, crimps, breadboards, perfboards · Heatshrink tube spools · Connectors Storage |
3A | Storage |
3B | Tools |
3C | Tools |
3D | Tools |
3E | Tools |
3F | Tools |
3G | Tools · Cables & Adaptors · Stationary · Soldering equipment · Other Tools |
4A | Storage |
4B | Battery holders |
4C | Battery holders |
4D | Jumper wires, connector wires · Wire spools · Wire Storage |
5A | Storage |
5B | 1aa Sensors · 2ba Sensor modules · 3aa Small MCUs |
5C | Modules |
5D | Modules |
5E | Modules |
5F | Modules |
5G | Modules |
5H | Modules |
5I | Modules · M Storage · Displays · Power supplies · K Storage · Ribbon Cables · Speakers |
6A | Storage |
6B | 1ba Sensors · 2bb Switches, buttons, batteries · 3bb Big MCUs |
6C | Modules · Micro controllers |
6D | Modules · Micro controllers |
6E | Micro controllers · Modules |
6F | Modules · Micro controllers · Microcontrollers, SBCs · Motors & controllers · Other Expensive Items · Storage |
7A | Storage |
7B | Storage |
8A | Storage |
8B | U7 |
8C | U5 |
8D | U5 |
8E | U3 |
8F | U3 |
8G | U1 |
8H | U1 |
8I | S1 · S Storage · Q Storage · D Storage · U Storage · Y Storage · F Storage |
9A | Storage |
9C | Q1 · S Storage · Q Storage · D Storage · U Storage · Y Storage · F Storage |
9D | S Storage · Q Storage · D Storage · U Storage · Y Storage · F Storage |
10A | Storage |
10B | U8 |
10C | U6 · U4 · U2 · D1 · Bin |
11A | Storage |
11B | U17 · U16 · U15 |
11C | U14 |
11D | U13 |
11E | U12 |
11F | U11 · U10 · U9 · D2 (LED) · Shop towel · Cleaning equipment |
12A | Storage |
12B | Q10 · Q9 · Q8 · Q7 · Q6 |
12C | R Storage · C Storage · L Storage |
13A | Storage |
13B | Storage |