Your project may be free-as-in-speech, but that doesn’t mean it has to be free-as-in-beer. This handy coin validator/acceptor module is just like the ones you’ve seen in arcades. First, program it with what coin you want it to accept, any coin from 10.8mm to 25.1mm in diameter can be used. When a valid coin is inserted, the output line will pulse for 20-60ms (configurable). The acceptor looks for diameter, thickness, dropping speed, etc to determine if a coin is valid. You can select 3 different “strictness” levels.
Comes with the acceptor itself, mounting hardware, and a cable for power/signal.
To program the validator: power with 12VDC (red wire goes to +12VDC, black wire to common ground). Press and hold the little button on top for 5 seconds and release. The LED will be on. Now insert 30 sample coins of the value you want to detect (say 30 quarters or 30 Euro coins). Once the LED goes out it’s programmed! Connect a 10K (1K to 100K is fine) pullup resistor from the white wire to your microcontroller’s VCC line (for Arduino, this is a +5V). Insert a coin, and verify that the LED line pulses high for about 40 milliseconds.
- Power requirements: 12VDC (+- 20%)
- Quiescent current: ~25mA
- Peak current (for solenoid): 400mA
- Accepts coins from 10.8mm to 15.1mm in diameter, 1.2mm to 3.0mm thick
- Programmable for a single coin
There’s also a 4-coin model: Coin Acceptor – Programmable 4 Coin Type
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — How Intel Makes a Chip
Wearables — Tape tactics
Electronics — Ground connections cooler via more vias
Biohacking — Itch Tracker for Apple Watch
No comments yet.
Sorry, the comment form is closed at this time.