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Build your homemade casio calculator cable

Learn how to program. Code snippets for creating sprites etc. Submit your own or use those of others.
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Calculators: Casio fx-9860G

Re: Build your homemade casio calculator cable

Postby Razumikhin » Thu Aug 01, 2013 9:19 pm

Would it be possible to use a prebuilt rs232 to ttl converter as a casio cable? I assume all i would need extra is the 2.5mm jack.

http://www.ebay.co.uk/itm/RS232-To-TTL- ... 19ca595338

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Calculators: Casio fx-7400GII, Casio fx-7400GII (SH4), Casio fx-9750 G II, Casio fx-9750 G II (SH4), Casio fx-9860G, Casio fx-9860 G SD, Casio fx-9860G Slim, Casio fx-9860 GII SD, Casio fx-9860 GII SD Power Graphic 2, Casio Classpad 330 plus, Casio fx-CG 20, Casio Classpad fx-cp400, Casio fx-CG 50

Re: Build your homemade casio calculator cable

Postby SimonLothar » Fri Aug 02, 2013 9:08 am

Razumikhin wrote:Would it be possible to use a prebuilt rs232 to ttl converter as a casio cable? I assume all i would need extra is the 2.5mm jack.

http://www.ebay.co.uk/itm/RS232-To-TTL- ... 19ca595338
Active converter powered by some USB-port. TTL-RXD, TTL-TXD and GND ready to be distributed freely by some patch wires, which you have to connect to the 2.5mm only.
I'd say yes! This should save some soldering time.
I'll be back!

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Joined: Fri May 19, 2017 12:34 pm
Calculators: Casio Cfx Series

Re: Build your homemade casio calculator cable

Postby ant » Fri May 19, 2017 5:09 pm

Hmm. There is a possible danger that running it from a 5v USB port will mean the transmit will be at 5v not 3.3v as you want. It states power from 3.3v to 5v. Ask if output voltage is selectable. TTL volts can be different and incompatible.

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Posts: 8
Joined: Fri May 19, 2017 12:34 pm
Calculators: Casio Cfx Series

Re: Build your homemade casio calculator cable

Postby ant » Fri May 19, 2017 8:02 pm

You should be able to buy a 3 3v regulator module for about 50p. Just to be safe.

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Joined: Fri May 19, 2017 12:34 pm
Calculators: Casio Cfx Series

Re: Build your homemade casio calculator cable

Postby ant » Sat May 20, 2017 5:16 pm

You put it between the USB and the unit. These things often run at the voltage they are supplied with.

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