A simple bench power supply using an LRS-150-12 psu and a 32v DC-DC buck converter. I designed this before I really knew how to design so terminals on the power switch collide with the buck unless the wires are soldered. I have supplied the STEP file incase someone wants to adjust this.

PSU: https://www.aliexpress.com/item/33060819096.html?spm=a2g0o.order_list.order_list_main.80.5ed61802C2ze3N

Buck: https://www.aliexpress.com/item/1005001984464381.html?spm=a2g0o.productlist.main.115.4eb5TAUPTAUP4n&algo_pvid=c2ba0ccf-e255-44e6-878e-7f0e61884b54&algo_exp_id=c2ba0ccf-e255-44e6-878e-7f0e61884b54-57&pdp_npi=4%40dis%21NZD%2126.75%2123.00%21%21%21113.08%2197.25%21%402101f04d17297091434454358e938c%2112000018315289757%21sea%21NZ%21134768421%21X&curPageLogUid=4b0zq2J7kW4c&utparam-url=scene%3Asearch%7Cquery_from%3A

Female Banana Plug: https://www.aliexpress.com/item/32817241604.html?spm=a2g0o.productlist.main.5.2ad7ZwoWZwoWYy&algo_pvid=4e9ece11-33a3-4b44-971d-4f464b0e2878&algo_exp_id=4e9ece11-33a3-4b44-971d-4f464b0e2878-2&pdp_npi=4%40dis%21NZD%213.45%213.45%21%21%212.04%212.04%21%402101f04d17297092840621735e93b3%2164701807858%21sea%21NZ%21134768421%21X&curPageLogUid=lfdp2Ye6MBlf&utparam-url=scene%3Asearch%7Cquery_from%3A

Power Switch: https://www.aliexpress.com/item/32857063415.html?spm=a2g0o.order_list.order_list_main.57.44651802PD38VU