| Electronics > Projects, Designs, and Technical Stuff |
| Optically transparent electrical isolation of analog signal |
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| ricko_uk:
Hi, what is the best solution to transfer with highest accuracy an electrical signal (0 to 5V - up to 30KHz) from outside a faraday cage to insode it? 1) I was wondering if there are optically-transparent RF-shielding materials and then use some optocoupling means? 2) maybe there are already ready-made module solutions? 3) magnetically couple? but I am looking for a good fidelity signal transfer... Any suggestions? Many thanks :) |
| mikeselectricstuff:
Fibre optic through a metal tube |
| tggzzz:
Digitise to whatever standard suits you, then use optical fibre to transmit the digits, reconstruct on the outside. Since you didn't include a latency specification, you could also transfer the digits on paper or magnetic tape :) |
| ricko_uk:
thank you Mike, nice idea about the optical fibre. Any advantages using the tube over cutting a small round hole for the optical fibre into the enclosure? It would still leave that small area open, or am I missing something? Thank you :) |
| mikeselectricstuff:
The tube just gives more isolation than a simple hole. bear in mind the hole may need to be big enough to get a connector through |
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