Hello, I have a project where I am using a Photon to set a pin (momentarily) to HIGH to trigger a camera. The challenge is that the camera is about 25 feet away so the voltage received by the camera becomes too low. How can I boost the voltage to say 8V or 10V so that I can get at least 4-5v at t…

You are looking for a “buffer” and not a step-up regulator. A simple op-amp in voltage follower configuration would do the job.

THANK YOU @kennethlimcp . I am glad there is a way. Would you please send me a link as I have no idea what an op-amp is or how it would be connected :-).

[image] kennethlimcp: op-amp in voltage I am sending a GND and GPIO.

Without a power source, it’s not possible to locate the buffer IC chip near the destination (camera side) though…

What voltage are you measuring on the GPIO set to HIGH with reference to GND on the camera side? Trying measuring without connecting to the camera first.

At camera, I am only getting about 1.5VDC (25-foot wire). The camera was not connected. What did you mean earlier by "…Without a power source, it’s not possible to locate the buffer IC chip near the destination (camera side) )? Thanks again.

Would something like this work? [image] Amazon.com: 5PCS 200 Times Gain 5V-12V LM386 Audio Amplifier Module for Arduino EK1236: Home Audio & Theater Specification: Onboard LM386 Chip. 200 multiplier benefits circuit design. On-board speaker wiring Block. on-board 10K variable resistor, …

Can you measure the GPIO voltage on the Photon side and see if the voltage is indeed 3.3v?

I did. Yes, it is 3.3V. Thanks.

Boosting voltage from pins due to wire length

Hardware

kennethlimcp June 15, 2017, 6:52am 4

Hmm… On second thought, you are only wiring a ground and GPIO pin to the camera?

Or only 1 wire?

Topic		Replies	Views
Send pulse from one Photon to another 30 feet away Hardware	5	1130	May 23, 2017
Extending TTL signals Hardware	6	3014	June 26, 2018
2-wire 4-20ma transducer setup [SOLVED] General	31	5867	December 15, 2016
Sudden Photon Death Troubleshooting	11	3246	July 2, 2016
Photon & rs-485 General	29	11685	January 14, 2017

Boosting voltage from pins due to wire length

Related topics