Parking Monitoring USB Wifi Dashcam

Update: Lid_taller_akku_charge.stl added. This can be used to compensate for manufacturing tolerances of stepdown module.

Please pinch off the protruding wires, at the bottom of the stepdown module, before installation, so that the installation height is lower.

Small control box for parking lot monitoring of your own car. For protection against vandalism. (Data protection regulations of the respective country in which the product is used must be observed).

The control box controls a wifi dashcam/parking lot camera in 3 possible scenarios. The main focus is always on charging the powerbank, which supplies power to the camera while the vehicle is stationary.

The advantage of the control box with external power bank is obvious: car battery is conserved, so that the starting ability of the car is not affected.

Similarly, the power bank can also be charged at home via AC adapter during short trips.

Can only be used on 12V on-board power supply!

The control box is connected to KL15 / ignition / car socket.

The USB "Charge" port charges the power bank and is connected to the power bank with charging cable.

The "output akku" connector connects to the output of the powerbank.

The USB port "camera" is used to connect the dashcam/camera.

Stage 1 Ignition on: Powerbank is charging. Camera is off.

Stage 1 Ignition off: Camera is on - Parking lot monitoring is running. Battery is not charging

Stage 2 Ignition on: Power bank is charging. Camera on. Dashcam operation. (IMPORTANT: Requirement, the powerbank supports simultaneous charging when consumer is connected).

Stage 2 Ignition off: Powerbank is not charging. Camera is on - Parking lot monitoring on. .

Level 0 Ignition on: Powerbank is charging. Camera is off.

Stage 0 Ignition off: Camera is off. Powerbank is not charging.

In the files is the schematic of how to wire the whole thing in very simple representation way.

Here are the parts to order:

Dashcam used: https://de.aliexpress.com/item/1005004392903076.html?spm=a2g0o.cart.0.0.10744ae4c7H1Hj&mp=1&gatewayAdapt=glo2deu

USB port for camera: https://de.aliexpress.com/item/32265708803.html?spm=a2g0o.cart.0.0.10744ae4c7H1Hj&mp=1&gatewayAdapt=glo2deu

Relay 5 pin 12V 40A: https://de.aliexpress.com/item/4000144664741.html?spm=a2g0o.cart.0.0.10744ae4c7H1Hj&mp=1&gatewayAdapt=glo2deu

Metal bracket must be removed from relay.

Switch: https://de.aliexpress.com/item/33021344043.html?spm=a2g0o.cart.0.0.10744ae4c7H1Hj&mp=1&gatewayAdapt=glo2deu

KZF plug: https://de.aliexpress.com/item/1005003025719560.html?spm=a2g0o.cart.0.0.10744ae4c7H1Hj&mp=1&gatewayAdapt=glo2deu

USB A cable for "output battery" connection https://de.aliexpress.com/item/1000007049130.html?spm=a2g0o.cart.0.0.10744ae4c7H1Hj&mp=1&gatewayAdapt=glo2deu

USB step down for "charge battery" connection

https://de.aliexpress.com/item/1005004989035127.html?spm=a2g0o.productlist.0.0.11895fb91SyFCe&algo_pvid=afc4568d-220f-4366-93ae-6ff5cfafec65&aem_p4p_detail=202212121211587705535417734840001521208&algo_exp_id=afc4568d-220f-4366-93ae-6ff5cfafec65-4&pdp_ext_f=%7B%22sku_id%22%3A%2212000031255618472%22%7D&pdp_npi=2%40dis%21EUR%210.84%210.58%21%21%211.6%21%21%400b0a0ac216708759183381454e16df%2112000031255618472%21sea&curPageLogUid=07ZutiDAP6uX&ad_pvid=202212121211587705535417734840001521208_5&ad_pvid=202212121211587705535417734840001521208_5

You will also need 5 M3x8 cylinder head bolts plus two M3 washers.

The washers are required when mounting the switch block.

M3 threads must be cut yourself.

Commercially available cable ties should be used to fix the cables.

So, now have fun soldering ;)

Material used: ABS

Layer height: 0.2mm

Infill: 10%

No support necessary.