Hi.
Is it possible to wire 10 of your “Reflective Infrared IR Optical Sensor with 470 and 10K Resistors”(PRODUCT ID: 2349) to one micro controller so that a punchcard could be read? Or would it be better to buy the photo transistors and leds separately and wire them on opposite sides of one another? Also is there a suggested microcontroller for this? I’ve been thinking that I could create a circuit python punchcard reading HID device to interact with the terminal on a raspberry pi. Sort of like the punchcard reader on an old teletype asr model 33. I want to create a keyboard with an attached punchcard reader. Just because I think it might be possible to emulate that older technology in a smaller form factor
Thank you for everything you do. I appreciate you guys so much.
-Lesley
Optical punchcard reader and photo transistors
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- lesvaden3
- Posts: 33
- Joined: Sat Feb 01, 2020 3:38 pm
- lesvaden3
- Posts: 33
- Joined: Sat Feb 01, 2020 3:38 pm
Re: Optical punchcard reader and photo transistors
Like a punchcard reading macropad
- adafruit_support_bill
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Re: Optical punchcard reader and photo transistors
The ones we carry are aligned for best detection at a couple of mm. There are smaller ones tuned for closer operation that would likely work better. DigiKey & Mouser carry hundreds of different types.
That said, I think LEDs & photo transistors on opposite sides of the card would work better. There is an example of that here on Hackaday:
https://hackaday.com/2014/11/21/tweet-m ... nch-cards/
That said, I think LEDs & photo transistors on opposite sides of the card would work better. There is an example of that here on Hackaday:
https://hackaday.com/2014/11/21/tweet-m ... nch-cards/
- lesvaden3
- Posts: 33
- Joined: Sat Feb 01, 2020 3:38 pm
Re: Optical punchcard reader and photo transistors
Sounds good. Thank you for helping me. I will def buy everything that I can from you guys and will get the transistors with them.
I really appreciate you.
I really appreciate you.
Please be positive and constructive with your questions and comments.