Difference between revisions of "MHS-5200A DDS Signal Generator"
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== Replace Wall-wart Power Supply == | == Replace Wall-wart Power Supply == | ||
| − | * Wall warts put AC on the | + | * Wall warts put AC on the BNC grounds. |
** Fix it by replacing with an AC/DC linear supply | ** Fix it by replacing with an AC/DC linear supply | ||
* '''Diodes backwards on silkscreen/image''' | * '''Diodes backwards on silkscreen/image''' | ||
| Line 15: | Line 15: | ||
* 3x [https://www.mouser.com/ProductDetail/710-860020375018 Aluminum Electrolytic Capacitors - Radial Leaded WCAP-ATG5 1200uF 16V 20% Radial] | * 3x [https://www.mouser.com/ProductDetail/710-860020375018 Aluminum Electrolytic Capacitors - Radial Leaded WCAP-ATG5 1200uF 16V 20% Radial] | ||
* 4x [https://www.mouser.com/ProductDetail/583-1N5822-T 1N5822-T Schottky Diodes & Rectifiers Vr/40V Io/3A T/R] | * 4x [https://www.mouser.com/ProductDetail/583-1N5822-T 1N5822-T Schottky Diodes & Rectifiers Vr/40V Io/3A T/R] | ||
| + | ** '''Silkscreen cathode stripe on wrong end''' - Kicad library problem | ||
* 2x 5mm terminal blocks | * 2x 5mm terminal blocks | ||
| Line 45: | Line 46: | ||
[[File:Pwr-Sply-Repl-P17226-720px.jpg]] | [[File:Pwr-Sply-Repl-P17226-720px.jpg]] | ||
| + | |||
| + | * Works | ||
| + | |||
| + | [[File:Pwr-Sply-Repl-P17229-720px.jpg]] | ||
== Simulation == | == Simulation == | ||
Latest revision as of 16:33, 8 November 2020
Replace Wall-wart Power Supply
- Wall warts put AC on the BNC grounds.
- Fix it by replacing with an AC/DC linear supply
- Diodes backwards on silkscreen/image
Parts
- POWER XFMR 6.3Vct@1.2A 115V CHASSIS MOUNT w/LEADS/F-14X
- LF50ABV Voltage Regulator 5.0V 0.5A Positive
- Won;t work since unit draws 550 mA
- Using 7805
- 3x Aluminum Electrolytic Capacitors - Radial Leaded WCAP-ATG5 1200uF 16V 20% Radial
- 4x 1N5822-T Schottky Diodes & Rectifiers Vr/40V Io/3A T/R
- Silkscreen cathode stripe on wrong end - Kicad library problem
- 2x 5mm terminal blocks
Installation
- Plenty of room inside
- Inside view of rear panel
- Fit AC socket/switch where DC switch was located
- Cut with tin snips
- File for tight fit
- With AC socket/switch installed
- With transformer/Power Supply board installed and wired
- Power switch close-up
- DC switch looped back
- Works
Simulation
6.8Vrms = 9.615V peak
Reviews / Fixes
