Rotary compression tester

bilka00·rotary_compression_tester·pcb/RotaryCompressionTester.kicad_pcb

Rotary compression tester PCB layout, top view — open source board by bilka00

About the Rotary compression tester PCB

Rotary compression tester is an open source PCB design by bilka00, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 69.9 × 35.6 mm, with 23 components from 13 distinct parts.

Other key parts include the AMS1117-5.0 and Mini560. By type, the board carries 9 connectors, 8 resistors, 4 capacitors and 2 ICs.

It belongs with the power & battery and sensors designs in this gallery.

From the project

A Wi-Fi compression tester for Wankel (rotary) engines, built on a LOLIN D1 mini (ESP8266) and an ADS1115 ADC. The device raises its own access point and serves a single-page web UI, so any phone or laptop becomes the display — no screen, no buttons, no app.

A Wi-Fi compression tester for Wankel (rotary) engines, built on a LOLIN D1 mini (ESP8266) and an ADS1115 ADC. The device raises its own access point and serves a single-page web UI, so any phone or laptop becomes the display — no screen, no buttons, no app.

Unlike a piston-engine gauge, a rotary tester has to report three separate peaks per rotor revolution — one per rotor face — plus the cranking RPM they were taken at. RECT captures all three in one crank, logs them, and draws the pressure trace.

Rotary compression tester, from the project README — From the project README

Main components on the Rotary compression tester

AMS1117-5.0 Mini560

Rotary compression tester bill of materials (BOM)

23 components, 13 distinct parts.

Qty	Part	Footprint	Refs
1	AMS1117-5.0	SOT-223-3_TabPin2	U1
1	Mini560	Mini560	U2
1	ADS1115	PinHeader_1x10_P2.54mm_Vertical	J1
2	LOLIN D1 mini	PinHeader_1x08_P2.54mm_Vertical	J2, J3
2	Type-C PD/QC	PinHeader_1x02_P2.54mm_Vertical	J4, J5
1	Sen0	TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal	J6
1	Sen1	TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal	J7
1	Sen2	TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal	J8
1	Sen3	TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal	J9
2	10uF	C_0805_2012Metric	C1, C3
2	100nF	C_0805_2012Metric	C2, C4
4	5.11K	C_0805_2012Metric	R1, R3, R5, R7
4	10K	C_0805_2012Metric	R2, R4, R6, R8

Rotary compression tester design files

The KiCad project lives in the bilka00/rotary_compression_tester repository on GitHub; these links point at the commit this page was built from.

Layoutpcb/RotaryCompressionTester.kicad_pcb
Schematicpcb/RotaryCompressionTester.kicad_sch

Rotary compression tester: common questions

How big is the Rotary compression tester PCB?

The Rotary compression tester measures 69.9 × 35.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Rotary compression tester?

23 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the Rotary compression tester design files?

From the bilka00/rotary_compression_tester repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Rotary compression tester design in my own project?

Yes, under the terms of its GPL-3.0 license, which bilka00 chose for the repository.

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