MaskMoistureMeter
About the MaskMoistureMeter PCB
MaskMoistureMeter is an open source PCB design by RickP, published on GitHub. It is a 2-layer board measuring 41 × 37 mm, with 11 components from 9 distinct parts.
Other key parts include the TLC555IDR. By type, the board carries 3 resistors, 2 diodes, 2 capacitors, 1 IC, 1 battery holder and 1 buzzer.
From the project
A simple device that measures the moisture of face masks. It uses a 555 timer to measure the resistance of cloth.
A simple device that measures the moisture of face masks. It uses a 555 timer to measure the resistance of cloth.
If the mask is dry, it lights up a green LED. If the mask is moist it blinks a red LED and also beeps with a piezo buzzer. The faster is blinks and the higher the beepers pitch the more moisture is in your mask.
Replace and/or wash moist masks immediately as wearing a wet mask is dangerous to your health.
Main components on the MaskMoistureMeter
MaskMoistureMeter bill of materials (BOM)
11 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TLC555IDR | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | Battery_Cell | BatteryHolder_Keystone_1060_1x2032 | BT1 |
| 1 | Buzzer | Buzzer_Murata_PKMCS0909E4000-R1 | BZ1 |
| 1 | SW_Push | SW_SPST_TL3342 | SW1 |
| 1 | YELLOW | LED_0805_2012Metric_Castellated | D1 |
| 1 | RED | LED_0805_2012Metric_Castellated | D2 |
| 2 | 0.1uF | C_0603_1608Metric | C1, C2 |
| 2 | R75 | R_0603_1608Metric | R1, R2 |
| 1 | 1k | R_0603_1608Metric | R3 |
MaskMoistureMeter design files
The KiCad project lives in the RickP/MaskMoistureMeter repository on GitHub; these links point at the commit this page was built from.
- Layoutpcb/maskmeter.kicad_pcb
MaskMoistureMeter: common questions
How big is the MaskMoistureMeter PCB?
The MaskMoistureMeter measures 41 × 37 mm, has 2 copper layers and is 1 mm thick.
How many components are on the MaskMoistureMeter?
11 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the MaskMoistureMeter design files?
From the RickP/MaskMoistureMeter repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MaskMoistureMeter design in my own project?
The repository has no license, so all rights stay with RickP. Use it as a reference, and ask the author before reusing the design.