2021年12月16日 · Could someone help me to repair this DT830B digital multimeter, Please? Problem is can't measure DCV and it gave me 1 only. pls see video. This happened when I tested the 300 DCV with Diode mode in somehow. I saw the R5 in the circuit board is burnt. Is it the cause and what is the...

2013年2月24日 · DT830x Multimeter Circuit Diagram. Thread starter Electroenthusiast; Start date Feb 24, 2013; Status

2010年11月12日 · I recently purchased a DT-830B digital multimeter, something like this The DT830B pocket-size digital multimeter, from ebay. The item arrived early and the packaging seems intact. However, when I powered it up using a newly bought 9V battery, it doesn't seem to work. Switching the dial will only...

2016年9月23日 · Normally, would this multimeter only beep when in continuity mode? If so, there might be something shorted or damaged in the continuity buzzer circuitry. You will probably want to reverse engineer the circuitry to determine if it is handled through a separate circuit or through the main COB (Chip On Board) controller.

2018年2月11日 · -The circuit above can switch road up to 1000 Wattage of 220/110 VAC ,but you can increase the road driving ability by replacing relay with the big one (high current switching relay) -This circuit can also be used to switch very high voltage and high current devices if it connected to high current conductors which will be switched on by relay.

2024年1月7日 · Now I checked the test with a 1n4007 diode, I put the series test lamp in the circuit and the ammeter of the dt832 multimeter, the amperage is measured, but due to the power loss compared to the diode, it does not show 0.39A, instead it shows 0.22A. Vrms=230v r filament lamp stat off = 33 ohm i = 0.39A i with diode =0.22A

2012年1月9日 · Hey fellows, need a hand on this circuit here with a LM2576T-ADJ switching regulator **broken link removed** There is an item in the diagram called uH and I cant find anything on Google as to what this pertains. I want to be able to adjust the output voltage on the fly, preferably with a pot, not sure if thats what its calling for.

2013年1月28日 · The black lead goes to the COM terminal (which is the reference point) and the red lead goes to the IN+ terminal of the multimeter circuit. The voltage to be measured is supplied to the IN+ terminal. The input voltage applied at the IN+ terminal is appropriately scaled (based on the selected range) through an on-board circuit before it is fed ...

2009年12月3日 · Circuit diagram of a Micronta 22-220A Multimeter?. leal New Member ... electronic circuit diagram for ...

2014年6月3日 · I agree with mvs sarma, the schematic says 'M830B theory diagram'. So it may be just a reference for the standard model. In different models and year of production, there may be variations of the circuit addons and different PCB design. So it is likely that R17 of the OP's meter might not be the R17 in the schematic.