HREM ATtiny85 Door Latch Reminder Bare PCB
$2.00
US$2.00 per bare PCB. 2 copper layers. PCB production lead time: 2-3 days.
Door-latch reminder prototypes and low-power embedded learning.
One unpopulated board only. Electronic components, external modules and accessories are excluded. Images are upstream design references and may show assembled components.
PCBA production lead time: 5-10 days, subject to component availability and assembly-scope confirmation. Shipping transit time is additional.
Choose your PCB color: Green, Purple, Red, Yellow, Blue, White, Black or Matte Black.
For bare PCB orders, please enter your preferred soldermask color in the order notes at checkout. If ordering multiple products, specify the product name and color for each item. Example: Arisu PCB – Purple. Product images are references; the supplied PCB color follows your confirmed order requirements.
Prefer to order with your Gerber files? Upload your Gerber files on our PCB/PCBA online ordering page, select your PCB color and manufacturing specifications, and place your order directly. Pricing is calculated from your uploaded files and selected options.
5% of this product’s net sales goes to the shared DIYIPCB Open Hardware Fund, at no extra charge.
See the fund & rules →In stock
Description
HREM ATtiny85 Door Latch Reminder Bare PCB
Manufactured by DIYIPCB using the open hardware design from bazhenov/hrem. Selected version: Repository master fabrication design.
Design functions
Battery-powered reminder design that checks a magnetic door-latch sensor and sounds a buzzer when the latch remains open.
Typical applications
Door-latch reminder prototypes and low-power embedded learning.
Main chips and components in the design
ATtiny85 microcontroller and HT7733A boost converter, with an external Honeywell SS49 Hall sensor in the reference design.
These describe the assembled design. Components are not supplied with the bare PCB, and firmware or host software may be required.
What you receive
One unpopulated PCB. US$2.00 per board. Battery, magnet, Hall sensor, buzzer and all components are excluded. This is a reminder project, not a certified security alarm.
Images are upstream design references and may show components or accessories that are not included. Soldermask color may differ.
PCB and order details
- Copper layers: 2
- Nominal board thickness: 1.6 mm
- PCB production lead time: 2-3 days; shipping transit time is additional.
- Estimated shipping weight: 50 g per board including packaging allowance.
Complete PCBA service
DIYIPCB provides component sourcing, SMT assembly, through-hole and hand soldering, and worldwide shipping. For an assembled board, send us your required quantity and any firmware, testing or accessory requirements. PCBA production lead time: 5-10 days, subject to component availability and assembly-scope confirmation. PCBA pricing is confirmed by quotation.
Contact Us for PCBA or email service@diyipcb.com.
Open-source design and manufacturing files
License and attribution
Design license: MIT. Original copyright notices are reproduced below. DIYIPCB is an independent manufacturer and is not endorsed by the upstream project.
Upstream license and notices
MIT License Copyright (c) 2020 Denis Bazhenov Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
5% of eligible net product sales supports the Open Hardware Fund, at no extra charge.
Additional information
| Weight | 0.05 kg |
|---|---|
| PCB Layers | 2 |
| Version | Repository master fabrication design |
| Build Option | Bare PCB; PCBA by quotation |
| PCB Production Lead Time | 2-3 days |
| PCBA Production Lead Time | 5-10 days |
| PCB Color (Order Notes) | Green, Purple, Red, Yellow, Blue, White, Black, Matte Black |
Maker & product resources
Maker / seller: DIYIPCB; design: bazhenov/hrem
Hardware license: MIT
Source repository: https://github.com/bazhenov/hrem
Documentation: https://github.com/bazhenov/hrem
Check the product description for specifications, included items, stock and fulfillment details.
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