{"id":9266,"date":"2020-06-11T20:46:01","date_gmt":"2020-06-11T20:46:01","guid":{"rendered":"https:\/\/stevepedwards.today\/stevepedwards.com\/ElectronicsStuff\/?p=9266"},"modified":"2020-08-07T19:22:08","modified_gmt":"2020-08-07T18:22:08","slug":"lm358-dual-op-amp-tester","status":"publish","type":"post","link":"https:\/\/stevepedwards.today\/ElectronicsStuff\/lm358-dual-op-amp-tester\/","title":{"rendered":"LM358 Dual Op Amp Tester"},"content":{"rendered":"<p>LM358 - Same pins as:<\/p>\n<p>TL092<\/p>\n<p>6558\/6552<\/p>\n<p>M5219<\/p>\n<p>This is the modified version of the LM 741 Op Amp tester in the older Post:<br \/>\n<a href=\"https:\/\/stevepedwards.today\/circuitdigest.com\/electronic-circuits\/opamp-lm741-tester-circuit\">https:\/\/stevepedwards.today\/circuitdigest.com\/electronic-circuits\/opamp-lm741-tester-circuit<\/a><br \/>\n<img decoding=\"async\" src=\"https:\/\/stevepedwards.today\/circuitdigest.com\/sites\/default\/files\/circuitdiagram\/opamp-tester-circuit-diagram.png\" alt=\"opamp tester circuit diagram\" \/><br \/>\nI'll draw it out correctly, but basically it's twice the above circuit with pin 7 Vcc changed to pin 8, and the LM358 amps are pins 2-;3+;1 out; 6-;5+; 7 out with pin 4 gnd the same. I changed 10k to 8.2k as I have more of them:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9446\" src=\"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2020\/06\/LM358Tester.png\" alt=\"\" width=\"768\" height=\"498\" \/><br \/>\nThe plots at the cap - charging\/discharging - and LED show why the LED blinks with square wave pulses. Now build the other side the same for pins 5,6,7.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-9448\" src=\"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2020\/06\/plot-1024x640.png\" alt=\"\" width=\"840\" height=\"525\" \/><br \/>\n<iframe loading=\"lazy\" title=\"LM358 dual op amp tester\" width=\"1778\" height=\"1000\" src=\"https:\/\/www.youtube.com\/embed\/pTaCK0h9fcE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><br \/>\nI have used it to test the original M5219P tone amp in the Technics V1X that I thought had a duff side until I found the link cable pin short, but it's fine.<br \/>\nIt's a handy tester to have if you work on stereo amps with tone control stage op amps in them.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>LM358 - Same pins as: TL092 6558\/6552 M5219 This is the modified version of the LM 741 Op Amp tester in the older Post: https:\/\/stevepedwards.today\/circuitdigest.com\/electronic-circuits\/opamp-lm741-tester-circuit I'll draw it out correctly, but basically it's twice the above circuit with pin 7 Vcc changed to pin 8, and the LM358 amps are pins 2-;3+;1 out; 6-;5+; 7 <a href=\"https:\/\/stevepedwards.today\/ElectronicsStuff\/lm358-dual-op-amp-tester\/\" class=\"more-link\">...<span class=\"screen-reader-text\">  LM358 Dual Op Amp Tester<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-9266","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts\/9266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/comments?post=9266"}],"version-history":[{"count":2,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts\/9266\/revisions"}],"predecessor-version":[{"id":9380,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts\/9266\/revisions\/9380"}],"wp:attachment":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/media?parent=9266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/categories?post=9266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/tags?post=9266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}