zero cross detector circuit

robotdyn

how to connect AC dimmer to microcontroller

circuitar , has dectection pulse, but no opto-isolation

pyboard aliexpress:

another module?

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劣質洗衣機入水喉

上面白色是最易找到,$2x. 但漏水. 灰色, $4x, 是假冒 "MADE IN ITALY" 假冒 "MADE IN ITALY" 的標緻左面是白色膠喉的喉頭, 右面是灰色膠喉的喉頭, 上圖左面是真正好貨 ( MADE IN ITALY )灰色膠蓋.右面是冒牌白色膠蓋. 膠蓋在安裝扭緊時爆開上圖左面是真正好貨 , 標了其他規格.右面是冒牌, 單單印了 MADE IN ITALY 好貨的膠蓋是可以下移, 露出喉頭及黑色軟膠墊黑色軟膠墊是有坑紋. 質感較柔軟. 緊後可以"迫實"水龍頭及喉蓋, 沒有滲漏正板 MADE IN ITALY 賣 $4x, 價錢絕對合理. 冒牌貨在旺角新填地街買的, 也是$4x. 真是要小心!!! NB: MADE IN ITALY 是否真正意大利制造實在無從考証

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ES8311 and ES8388 codec IC

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sharpstar 150mm f/2.8 hyperbolic astrograph

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Hello!! It's Joseph

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