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Suppliers/Dealers or anyone selling with a commercial view in mind CANNOT post here unless responding to a specific request of a member in a "wanted" post.
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2020 Jimny front camera
01 Oct 2020 11:10 #228671
by DrRobin
2011 Blue Jimny SZ3, Hankook Dynapro/Maxxis Worm-Drive, BB Classics BB6 Sports Seats, Radius Arm protectors, Android Head, DAB, 360 Camera, TPMS, K&N, Bosch Aerotwin, boot light, parcel shelf, boot box, dash box, Osram Nightbreakers, CTEK Battery Sense, Front & Rear Recovery points, CB Radio.
Replied by DrRobin on topic Re:2020 Jimny front camera
This is the circuit I used to combine front and rear cameras on a Gen 3 fitted with an Xtrons (Android Head Unit) and AV cameras. It might not be suitable for the factory fit unit on a Gen 4.
I haven't shown the NE555 circuit details it was a module I bought, although the circuit is well known. The trigger input is positive edge triggered and I wanted negative edge, so I passed it through a capacitor and resistor to generate the correct signal on the negative edge. I can detail this if you are interested.
In operation, go in to reverse, the reversing lights signal fires the relay and connects the AV output of the camera to the Xtrons AV input and also provides 12V to the Xtrons reverse camera input so the head unit switches to the camera display.
When I come out of reverse, the NE555 activates the front camera and provides 12V to the Xtrons reverse camera input. Since the relay now drops out the AV signal from the front camera is fed to the Xtrons unit and it displays the front camera. After 5 seconds or so the NE555 times out and the front camera goes off, the Xtrons display goes back to normal.
If I switch the dashboard front switch on this powers the front camera and also sends 12V to the Xtrons to say there is a camera to display. Since the relay is not activated the front camera is displayed.
If the front camera is displayed by either the switch or by the NE555 timer and I go back in to reverse the rleay changes and I get the reverse camera.
It now means I get the rear camera when I reverse and then when I go forwards I get 5 seconds of front camera. I can also have the front camera on at any time, handy to see the pot hole/ditch the front is about to go in to when off road, until the mud covers the camera.
I haven't shown the NE555 circuit details it was a module I bought, although the circuit is well known. The trigger input is positive edge triggered and I wanted negative edge, so I passed it through a capacitor and resistor to generate the correct signal on the negative edge. I can detail this if you are interested.
In operation, go in to reverse, the reversing lights signal fires the relay and connects the AV output of the camera to the Xtrons AV input and also provides 12V to the Xtrons reverse camera input so the head unit switches to the camera display.
When I come out of reverse, the NE555 activates the front camera and provides 12V to the Xtrons reverse camera input. Since the relay now drops out the AV signal from the front camera is fed to the Xtrons unit and it displays the front camera. After 5 seconds or so the NE555 times out and the front camera goes off, the Xtrons display goes back to normal.
If I switch the dashboard front switch on this powers the front camera and also sends 12V to the Xtrons to say there is a camera to display. Since the relay is not activated the front camera is displayed.
If the front camera is displayed by either the switch or by the NE555 timer and I go back in to reverse the rleay changes and I get the reverse camera.
It now means I get the rear camera when I reverse and then when I go forwards I get 5 seconds of front camera. I can also have the front camera on at any time, handy to see the pot hole/ditch the front is about to go in to when off road, until the mud covers the camera.
2011 Blue Jimny SZ3, Hankook Dynapro/Maxxis Worm-Drive, BB Classics BB6 Sports Seats, Radius Arm protectors, Android Head, DAB, 360 Camera, TPMS, K&N, Bosch Aerotwin, boot light, parcel shelf, boot box, dash box, Osram Nightbreakers, CTEK Battery Sense, Front & Rear Recovery points, CB Radio.
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