http://www.elecfree.com/electronic/12vdc-negative-voltage-dc-converter-by-555/ Sat, 13 Mar 2010 17:02:38 +0000 http://wordpress.org/?v=2.6.5 http://www.elecfree.com/electronic/12vdc-negative-voltage-dc-converter-by-555/#comment-1955 convert 0-5v pluses to +/-15v pulses - Electronic Circuits Projects Diagrams Free Wed, 14 Oct 2009 20:47:46 +0000 http://www.elecfree.com/electronic/12vdc-negative-voltage-dc-converter-by-555/#comment-1955 [...] this to generate -15V from a +15V supply: 12VDC Negative Voltage DC Converter by 555 | Circuit Project Electronic Use that to power an opamp. (-) input biased by a voltage divider at +2.5V. (+) input driven by [...] [...] this to generate -15V from a +15V supply: 12VDC Negative Voltage DC Converter by 555 | Circuit Project Electronic Use that to power an opamp. (-) input biased by a voltage divider at +2.5V. (+) input driven by [...]

]]> http://www.elecfree.com/electronic/12vdc-negative-voltage-dc-converter-by-555/#comment-1018 12VDC Negative Voltage DC Converter by 555 | วงจร โครงงาน อิเล็กทรอนิกส์ Wed, 01 Oct 2008 06:45:42 +0000 http://www.elecfree.com/electronic/12vdc-negative-voltage-dc-converter-by-555/#comment-1018 [...] The circuit is very simple, and is easily made on Veroboard or similar. Construction is not critical, and the schematic is shown in Figure 1 below. Rectifier diodes should be ultrafast (UF4004 or similar) … วงจรแปลงจากไฟบวก 12V เป็นไฟลบ 12V โดยใช้ IC 555 ง่ายดี อ่านต่อ [...] [...] The circuit is very simple, and is easily made on Veroboard or similar. Construction is not critical, and the schematic is shown in Figure 1 below. Rectifier diodes should be ultrafast (UF4004 or similar) … วงจรแปลงจากไฟบวก 12V เป็นไฟลบ 12V โดยใช้ IC 555 ง่ายดี อ่านต่อ [...]

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