The bench's parts list

Printable: NES controller-port bridge, v1b: drawing package TM-NESB-001 rev P (PDF); v1b as built, the checks called out on the photograph (PNG); NES controller-port bridge, v2b: drawing package TM-NESB-002 rev A (PDF).

Generated by tools/parts.py from tools/draw-schematics.py, which is the same file that draws the schematics. Nothing here is typed except the status column: a drawing cannot know what is in a drawer.

The console, the Pi, the scope, the relay contacts and the port connectors are drawn on the sheets with conn=True, which marks a thing the bench CONNECTS TO rather than a part to buy, and this list skips them for that reason. So everything below is something that has to exist in a drawer before a sheet can be built.

What to gather

Every distinct part across every sheet, with where it is.

part	status	note
74HCT04	on hand	SN74HCT04N, the tube that arrived 2026-09-09
74HC165	on hand	the TI bag. v2b needs a second one
100nF	on hand	v2b runs seven
1k	on hand	R2, the clock pin's series element, placed 2026-09-15
100pF	on hand	C4, the clock pin's filter, placed 2026-09-15
Arduino UNO R3 (ATmega328P)	on hand	the pile
74HC595	on hand	the box of 30
100R	on hand	the trigger
PC817 module	on hand	module, for the reset pads
relay module, 5 V coil	on hand	5 V coil with an opto input
LM1881N	TO ORDER	the one real order. An old National part, mostly resellers now: buy two
680k	check	LM1881 RSET. One resistor
74HCT165	on hand	the C6 sheets' register. HCT there because the C6 drives it at 3.3 V
74LVC245	on hand	C6 sheets only; no UNO sheet uses one any more
ESP32-C6-DevKitC-1 v1.2	on hand	DevKitC-1 v1.2, the alternative build
10k	on hand	pad adapter only; fitted on the P4 build 2026-09-27. The first part fitted there was 10 ohms: read the bands
TP4056 + protection	to order	pad adapter only
MCP1700-3302 LDO	to order	pad adapter only
slide	to order	pad adapter only, the power switch
power	to order	pad adapter only, the battery
+330R	check	pad adapter only, the LED
ESP32-WROOM-32 devkit	on hand	the 30-pin devkit on the breadboard, the BLE build since 2026-09-30

bench-v1b

Build this first. The UNO bridge, one port, everything at 5 V.

ref	part	on the sheet
U1	74HCT04 at +5V	2.0 V threshold: safe on NMOS OUT0
U2	74HC165 at +5V (the TI bag)	H shifts out first
C1	100nF	+5V to GND
C2	100nF	+5V to GND
C3	100nF	+5V to GND
R2	1k	CON_CLK to CP
C4	100pF	CP to GND
A1	Arduino UNO R3 (ATmega328P)	5 V logic, 16 MHz
U3	74HC595 at +5V	one RCLK edge = one byte
R1	100R	TRIG to EXT_TRIG

bench-v1b-head

v1b sheet 3: the head's hands, reset and power from the Pi (bring-up 6.2 and 6.3).

ref	part	on the sheet
OK1	PC817 module	open collector across the reset button
K1	relay module, 5 V coil	MEASURED: GPIO27 high powers the console

bench-v2b

Build this second. Two ports on one SPI chain, sync counted, still one UNO.

ref	part	on the sheet
U1	74HCT04 at +5V	4 spare inputs to GND
U2	74HC165 at +5V	H shifts out first
U6	74HC165 at +5V	H shifts out first
C1	100nF	+5V to GND
C2	100nF	+5V to GND
C3	100nF	+5V to GND
C4	100nF	+5V to GND
C5	100nF	+5V to GND
C6	100nF	+5V to GND
A1	Arduino UNO R3 (ATmega328P)	serial 115200 to the Pi
U5	74HC595 at +5V	port 1's byte, shifted in second
U7	74HC595 at +5V	port 2's byte, chained from U5
U8	LM1881N at +5V	5 V outputs: no 245 needed
C7	100nF	VIDEO to VID_AC
R2	680k	RSET to GND
C8	100nF	RSET to GND
R1	100R	TRIG to EXT_TRIG

bench-v1

The ESP32-C6 alternative to v1b. Not the build.

ref	part	on the sheet
U1	74HCT04 at +5V	5 spare inputs to GND
U2	74HCT165 at +5V	H shifts out first
C1	100nF	+5V to GND
C2	100nF	+5V to GND
U3	74LVC245 at 3V3	5V tolerant inputs, A to B
C3	100nF	3V3 to GND
U4	ESP32-C6-DevKitC-1 v1.2	RISC-V, BLE 5, Wi-Fi 6
R1	100R	TRIG to EXT_TRIG
OK1	PC817 module	open collector across reset
K1	relay module, 5 V coil	opto in, active low

bench-v2

The C6 alternative to v2b. Not the build.

ref	part	on the sheet
U1	74HCT04 at +5V	4 spare inputs to GND
U2	74HCT165 at +5V	H shifts out first
U6	74HCT165 at +5V	H shifts out first
U5	74HC595 at 3V3	port 1 byte
U7	74HC595 at 3V3	port 2 byte, chained
C1	100nF	+5V to GND
C2	100nF	+5V to GND
C3	100nF	3V3 to GND
C4	100nF	3V3 to GND
U8	LM1881N at +5V	composite sync out
C6	100nF	VIDEO to VID_AC
R2	680k	RSET to GND
C7	100nF	RSET to GND
U3	74LVC245 at 3V3	six lines down to 3V3
U4	ESP32-C6-DevKitC-1 v1.2	RISC-V, BLE 5, Wi-Fi 6
R1	100R	TRIG to EXT_TRIG

pad-adapter

The original pad as a wireless HID device. A separate project.

ref	part	on the sheet
R1	10k	PAD1_D0 to 3V3
R2	10k	PAD2_D0 to 3V3
U1	ESP32-C6-DevKitC-1 v1.2	NimBLE HID; no USB device
U2	TP4056 + protection	LiPo charger module
U3	MCP1700-3302 LDO	or the devkit's own 3V3 from VBUS
SW1	slide	MODE_SW to GND
SW2	power	VBAT to VBAT_SW
LED1	+330R	LED to GND

pad-ble

The C6 design, superseded. One pad, one pullup, the C6 on USB power; the board never accepted a flash, see pad-ble-p4.

ref	part	on the sheet
R1	10k	PAD1_D0 to 3V3
U1	ESP32-C6-DevKitC-1 v1.2	NimBLE HID keyboard; no USB device controller
C1	100nF	3V3 to GND

pad-ble-p4

The one to build. The same circuit on the board that actually flashes: a Waveshare ESP32-P4-Module-DEV-KIT, wired at header P6.

ref	part	on the sheet
R1	10k	PAD1_D0 to 3V3
C1	100nF	3V3 to GND

pad-ble-esp32

The BLE build, on the board with a radio of its own. The same circuit on a classic ESP32-WROOM-32 devkit, pins D25, D26 and D27; the C6 died and the P4 cannot do BLE.

ref	part	on the sheet
R1	10k	PAD1_D0 to 3V3
U1	ESP32-WROOM-32 devkit	30 pins; the labels are the board's own silkscreen; D is GPIO
C1	100nF	3V3 to GND

Pulled at build time from nes-bench/docs/parts.md; the repository is the one copy. The reports use some working words of their own: Words the reports use.